2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2596

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2596

Schematic Reference

Hybrid Controls Schematics ()

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning)for scan tool information

Special Tools

J 38522 - Variable Signal Generator

For equivalent regional tools, refer to Special Tools ().

Circuit/System Verification

1. Ignition ON with the engine OFF, command the Aux. Trans. Pump Speed to 50 percent with the scan tool. Attempt to maintain pump

operation for at lease 60 seconds.

2. Observe the aux. trans. fluid pump actual display and the aux. trans. fluid pump commanded displays with the scan tool. Actual pump speed

should be maintained within 10 percent of commanded. The pump should not make excessive noise or stall.

瀚慖f the actual speed is within 10 percent of commanded speed an electrical fault condition is not currently present, if an aux. trans. fluid

pump pressure fault is suspected, test the aux. trans. pump line pressure output. Refer to Line Pressure Check (See: Transmission and

Drivetrain/Automatic Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/2ML70 - Automatic

Transmission/Line Pressure Check).

瀚慖f the difference between actual and commanded speed is greater than 10 percent, the pump is noisy, or the pump stalls, proceed to

Circuit/System Testing.

Circuit/System Testing

1. Inspect for DTC P0C2B. Diagnose P0C2B before performing this procedure.

2. Ignition ON, engine OFF, observe the Aux. Trans. Fluid Pump Fault Status 1 and Aux. Trans. Fluid Fault Status 2 displays with the scan

tool.

3. Command the aux. trans. fluid pump speed to 50 percent with the scan tool while observing the fault status displays.

瀚慠efer to the applicable diagnostic procedure below for the fault status indicated by the scan tool display.

瀚慖f No Fault status is displayed, review the Freeze Frame/Failure Records and perform the diagnosis indicated by the Fault Status

parameter display.

PWM Input Fault

1. Ignition OFF, disconnect PIM connector X1.

2. Ignition ON, test for 11-13V on the Trans. Aux. Oil Pump Control circuit from PIM connector X1 terminal 3 and chassis ground.

瀚慖f less than the specified range, test the control circuit for an open or short to ground. If the circuit tests normal, replace the ATFP Control

Module.

Note: Only connect the J 38522 - variable signal generator to the auxiliary transmission fluid pump control circuit when adjusted to 50

percent duty cycle. Duty cycles of less than 50 percent may damage the auxiliary transmission fluid pump assembly.

3. Pre-Adjust the J 38522 - variable signal generator to 50 percent duty cycle @ 250 Hz.

4. Connect the J 38522 - variable signal generator to the Trans. Aux. Oil Pump Control circuit, from the PIM connector X1 terminal 3 and

ground and listen for auxiliary transmission fluid pump motor operation.

瀚慖f pump operation is audible, replace the PIM.

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2526

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2526

Schematic Reference

Automatic Transmission Controls Schematics (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Diagrams)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Description and Operation

* Transmission General Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission General Description)

* Transmission Component and System Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission Component and System Description)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning)for scan tool information

Circuit/System Verification

1. Engine ON, accessories OFF, measure and record the battery voltage with a DMM. The battery voltage should be between 12.5-14.5 volts.

瀚慖f the voltage is not within the specified value, or the charge indicator light is ON, refer to Symptoms - Engine Electrical (See: Starting

and Charging/Testing and Inspection/Symptom Related Diagnostic Procedures/Symptoms - Engine Electrical).

2. Observe the scan tool TCM Ignition Voltage parameter. The reading should be between 12.5-14.5 volts.

3. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the

conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

1. Ignition OFF, disconnect the X1 16-way harness connector at the T12 automatic transmission assembly.

2. Ignition OFF, test for less than 5 ohms on the vehicle harness connector X1 terminal 5 and ground at the transmission case.

瀚慖f greater than then specified valve, test the ground circuit for an open/high resistance.

3. Ignition ON, verify that a test lamp illuminates at connector X1 vehicle harness side and the following terminals:

* Terminal 4 and ground at the transmission case

* Terminal 12 and ground at the transmission case

瀚慖f the test lamp does not illuminate on any circuit, test the ignition or B+ circuit for a short to ground or an open/high resistance.

4. If all circuits test normal, replace the Q8 control solenoid valve assembly.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

Perform the Service Fast Learn Adapts (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and

Inspection/Programming and Relearning) following all transmission related repairs.

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2129

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2129

Schematic Reference

* Automatic Transmission Controls Schematics (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Diagrams)

* Hybrid Controls Schematics ()

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information.

Circuit/System Verification

1. Engine running with the hood open, accessories OFF, measure and record the battery voltage. The voltage should be between 12.6-15.0 V.

瀚慖f not within the specified range, refer to DC Power Conversion Test ().

2. Observe the scan tool transmission data ignition voltage parameter. The reading should be between 12.6-15.0 V.

Circuit/System Testing

1. Ignition OFF, disconnect the X1 Q8 control solenoid assembly harness connector at the transmission.

2. Ignition ON, verify that a test lamp illuminates between the ignition voltage circuits listed below and ground.

* Terminal 4

* Terminal 12

瀚慖f the test lamp does not illuminate, test the ignition circuit for a Short to Ground or an Open/High Resistance.

3. If all circuits test normal, replace the Q8 control solenoid valve assembly.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

Control Module References (See: Testing and Inspection/Programming and Relearning) for control solenoid valve assembly replacement, setup,

and programming.

ECM

DTC P0563 (ECM)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2031

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2031

Schematic Reference

Engine Controls Schematics (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Description and Operation

Electronic Ignition System Description (See: Powertrain Management/Computers and Control Systems/Description and Operation/Electronic

Ignition System Description)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Special Tools

J 35616-A/BT-8637 - Connector Test Adapter Kit

Circuit/System Verification

1. Engine idling, observe the scan tool Crankshaft Position Active Counter parameter. The parameter should be incrementing.

2. Engine idling, observe the DTC information with a scan tool. DTC P0336 should not set.

3. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not set. You may also operate the vehicle within the

conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

Note: You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.

1. Ignition OFF, inspect the crankshaft position sensor for looseness and correct installation.

瀚慖f the crankshaft position sensor is loose, inspect the sensor and the O-ring for damage, replace as necessary.

2. Inspect the engine for the following conditions:

* Engine oil for debris and contamination

* Crankshaft reluctor wheel for damage

* The timing chain, tensioner, and sprockets for wear or damage

瀚慖f debris is found in the engine oil, inspect the internal engine components to determine the cause. Repair or replace any worn or damaged

components.

Component Testing

Note: You must perform the Circuit/System Testing before proceeding with Component Testing.

1. Inspect the crankshaft position sensor for correct installation. Remove the crankshaft position sensor from the engine and inspect the sensor

O-ring for damage.

瀚慖f the sensor is loose, incorrectly installed, or damaged, replace the crankshaft position sensor.

2. Connect the crankshaft position sensor harness connector to the crankshaft position sensor.

3. Ignition ON, engine OFF. Observe the Crankshaft Position Active counter parameter on the scan tool.

4. Pass a flat steel object across the tip of the sensor repeatedly. The Crankshaft Position Active counter parameter should increment with each

pass of the steel object.

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1764

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1764

Schematic Reference

Engine Controls Schematics (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

1. Ignition OFF, inspect the cooling system surge tank for the proper coolant level. Refer to Cooling System Leak Testing (See: Engine,

Cooling and Exhaust/Cooling System/Testing and Inspection/Component Tests and General Diagnostics) and Cooling System Draining and

Filling (Static Fill) (See: Engine, Cooling and Exhaust/Cooling System/Service and Repair/Cooling System Draining and Filling (Static Fill)

).

2. Inspect the thermostatically-controlled coolant heater, if equipped, for damage or modifications. Test for proper operation of the coolant

heater. Refer to Coolant Heater Inoperative (See: Engine, Cooling and Exhaust/Cooling System/Testing and Inspection/Symptom Related

Diagnostic Procedures/Coolant Heater Inoperative).

3. Ignition OFF for 8 h or greater.

4. Ignition ON, observe the scan tool IAT and ECT sensor parameters. The ECT, IAT, and ambient temperature should be within 6掳C (11掳F) of

each other.

5. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the

conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the B34 ECT sensor.

2. Ignition OFF for 90 s, test for less than 5 ohm between the low reference circuit terminal A and ground.

瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20

ECM.

3. Ignition ON, verify the scan tool ECT parameter is colder than -39掳C (-38掳F).

瀚慖f greater than the specified range, test the signal circuit terminal B for a short to ground. If the circuit tests normal, replace the K20 ECM.

4. Install a 3 A fused jumper wire between the signal circuit terminal B and the low reference circuit terminal A. Verify the scan tool ECT

parameter is greater than 149掳C (300掳F).

瀚慖f less than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace

the K20 ECM.

5. If all circuits test normal, test or replace the B34 ECT sensor.

6. Inspect for the proper operation of the OEM block heater cord by verifying that the thermostat has turned OFF the heater at temperatures

warmer than -10掳 (+14掳F).

Component Testing

Measure and record the resistance of the ECT sensor at various ambient temperatures, then compare those measurements to the Temperature Versus

Resistance (See: Powertrain Management/Computers and Control Systems/Specifications/Temperature Versus Resistance).

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1757

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1757

Schematic Reference

Engine Controls Schematics (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Special Tools

* J-35555 Metal Mityvac

* J-23738-A Mityvac

Circuit/System Verification

* Use the scan tool and compare the MAP Sensor parameter to a known good vehicle, under various operating conditions.

* Use the scan tool and compare the MAP Sensor parameter at ignition ON, with the engine OFF, to the Altitude vs Barometric Pressure table.

Refer to Altitude Versus Barometric Pressure (See: Powertrain Management/Computers and Control Systems/Specifications/Altitude

Versus Barometric Pressure).

Circuit/System Testing

Important: All electrical components and accessories must be turned OFF and allowed to power down.

1. Ignition OFF, disconnect the MAP harness connector at the MAP sensor.

2. Ignition OFF, test for less than 5 ohms between the low reference circuit and ground.

瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM.

3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit and ground.

瀚慖f less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,

replace the ECM.

瀚慖f greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the ECM.

4. Verify the scan tool MAP Sensor parameter is less than 12 kPa.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the ECM.

5. Install a 3A fused jumper wire between the signal circuit and the 5-volt reference circuit. Verify the scan tool MAP Sensor parameter is

greater than 103 kPa.

瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the ECM.

6. If all circuits test normal, test or replace the MAP sensor.

Component Testing

Important: You must perform the Circuit/System Testing in order to verify the integrity of the MAP sensor circuits before proceeding

with the Component Testing.

1. Turn ON the ignition, with the engine OFF, and remove the MAP sensor.

2. Install a 3A fused jumper wire between the 5-volt reference circuit and the corresponding terminal of the MAP sensor.

2010 Cadillac Truck Escalade RWD V8-6.2L Page 2596

2010 Cadillac Truck Escalade RWD V8-6.2L Page 2596

Schematic Reference

Hybrid Controls Schematics ()

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning)for scan tool information

Special Tools

J 38522 - Variable Signal Generator

For equivalent regional tools, refer to Special Tools ().

Circuit/System Verification

1. Ignition ON with the engine OFF, command the Aux. Trans. Pump Speed to 50 percent with the scan tool. Attempt to maintain pump

operation for at lease 60 seconds.

2. Observe the aux. trans. fluid pump actual display and the aux. trans. fluid pump commanded displays with the scan tool. Actual pump speed

should be maintained within 10 percent of commanded. The pump should not make excessive noise or stall.

瀚慖f the actual speed is within 10 percent of commanded speed an electrical fault condition is not currently present, if an aux. trans. fluid

pump pressure fault is suspected, test the aux. trans. pump line pressure output. Refer to Line Pressure Check (See: Transmission and

Drivetrain/Automatic Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/2ML70 - Automatic

Transmission/Line Pressure Check).

瀚慖f the difference between actual and commanded speed is greater than 10 percent, the pump is noisy, or the pump stalls, proceed to

Circuit/System Testing.

Circuit/System Testing

1. Inspect for DTC P0C2B. Diagnose P0C2B before performing this procedure.

2. Ignition ON, engine OFF, observe the Aux. Trans. Fluid Pump Fault Status 1 and Aux. Trans. Fluid Fault Status 2 displays with the scan

tool.

3. Command the aux. trans. fluid pump speed to 50 percent with the scan tool while observing the fault status displays.

瀚慠efer to the applicable diagnostic procedure below for the fault status indicated by the scan tool display.

瀚慖f No Fault status is displayed, review the Freeze Frame/Failure Records and perform the diagnosis indicated by the Fault Status

parameter display.

PWM Input Fault

1. Ignition OFF, disconnect PIM connector X1.

2. Ignition ON, test for 11-13V on the Trans. Aux. Oil Pump Control circuit from PIM connector X1 terminal 3 and chassis ground.

瀚慖f less than the specified range, test the control circuit for an open or short to ground. If the circuit tests normal, replace the ATFP Control

Module.

Note: Only connect the J 38522 - variable signal generator to the auxiliary transmission fluid pump control circuit when adjusted to 50

percent duty cycle. Duty cycles of less than 50 percent may damage the auxiliary transmission fluid pump assembly.

3. Pre-Adjust the J 38522 - variable signal generator to 50 percent duty cycle @ 250 Hz.

4. Connect the J 38522 - variable signal generator to the Trans. Aux. Oil Pump Control circuit, from the PIM connector X1 terminal 3 and

ground and listen for auxiliary transmission fluid pump motor operation.

瀚慖f pump operation is audible, replace the PIM.

2010 Cadillac Truck Escalade RWD V8-6.2L Page 2526

2010 Cadillac Truck Escalade RWD V8-6.2L Page 2526

Schematic Reference

Automatic Transmission Controls Schematics (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Diagrams)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Description and Operation

* Transmission General Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission General Description)

* Transmission Component and System Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and

Operation/6L45/6L50/6L80/6L90 - Automatic Transmission/Transmission Component and System Description)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning)for scan tool information

Circuit/System Verification

1. Engine ON, accessories OFF, measure and record the battery voltage with a DMM. The battery voltage should be between 12.5-14.5 volts.

瀚慖f the voltage is not within the specified value, or the charge indicator light is ON, refer to Symptoms - Engine Electrical (See: Starting

and Charging/Testing and Inspection/Symptom Related Diagnostic Procedures/Symptoms - Engine Electrical).

2. Observe the scan tool TCM Ignition Voltage parameter. The reading should be between 12.5-14.5 volts.

3. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the

conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

1. Ignition OFF, disconnect the X1 16-way harness connector at the T12 automatic transmission assembly.

2. Ignition OFF, test for less than 5 ohms on the vehicle harness connector X1 terminal 5 and ground at the transmission case.

瀚慖f greater than then specified valve, test the ground circuit for an open/high resistance.

3. Ignition ON, verify that a test lamp illuminates at connector X1 vehicle harness side and the following terminals:

* Terminal 4 and ground at the transmission case

* Terminal 12 and ground at the transmission case

瀚慖f the test lamp does not illuminate on any circuit, test the ignition or B+ circuit for a short to ground or an open/high resistance.

4. If all circuits test normal, replace the Q8 control solenoid valve assembly.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

Perform the Service Fast Learn Adapts (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and

Inspection/Programming and Relearning) following all transmission related repairs.

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 706

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 706

Schematic Reference

Wiper/Washer Schematics (See: Wiper and Washer Systems/Diagrams/Electrical Diagrams)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

Description and Operation

Wiper/Washer System Description and Operation (See: Wiper and Washer Systems/Description and Operation)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for diagnostic tester information

Circuit/System Verification

Operate the front washer by using the S80 Window Wiper/Washer Switch. Verify the G24 Windshield Washer Pump activates.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the X50A Fuse Block - Underhood.

2. Disconnect the harness connector X4 at the K9 Body Control Module.

3. Test for less than 5 ohm between the control circuit terminal 14 at the X50A Fuse Block - Underhood and the control circuit terminal 14 X4

at the K9 Body Control Module.

瀚慖f the value is not within the specified range, test the control circuit for a short to voltage or an open/high resistance.

瀚慖f the circuit tests normal, test or replace the K9 Body Control Module.

4. Test for infinite resistance between the control circuit terminal 14 at the X50A Fuse Block - Underhood and ground.

瀚慖f the value is not within the specified range, test the control circuit for a short to ground.

5. If all circuits test normal, test or replace the X50A Fuse Block - Underhood.

Component Testing

Relay Test

1. Ignition OFF, disconnect the harness connector X5 at the K9 Body Control Module.

2. Test for 60-200 ohm between control circuit terminal 14 X4 at the K9 Body Control Module and ground.

瀚慖f the value is not within the specified range, test the control circuit for a short to ground, short to voltage or an open.

瀚慖f all circuits test normal, test or replace the X50A Fuse Block - Underhood.

Output Control Tests

Ignition ON, command the Windshield Washer Relay Command ON and OFF with a scan tool. Observe that the KR11 Windshield Washer Pump

Relay clicks and the G24 Windshield Washer Pump runs.

If the KR11 Windshield Washer Pump Relay does not work, replace the X50A Fuse Block - Underhood.

If the KR11 Windshield Washer Pump Relay works, but the G24 Windshield Washer Pump does not run, test the washer fluid pump control circuit

and the washer fluid pump ground circuit.

If all circuits test normal, replace the G24 Windshield Washer Pump.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, setup, and programming

* Relay Replacement (Attached to Wire Harness) (See: Power and Ground Distribution/Power Distribution Relay/Service and Repair/Relay

Replacement (Attached to Wire Harness))Relay Replacement (Within an Electrical Center) (See: Power and Ground Distribution/Power

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2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 540

Schematic Reference

Heated/Cooled Seat Schematics (See: Body and Frame/Seats/Seat Temperature Element/Diagrams/Electrical Diagrams)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

Description and Operation

Heated/Vented Seat Description and Operation (See: Body and Frame/Seats/Seat Temperature Element/Description and Operation/Heated/Vented

Seat)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Testing

B2425 0B, B2425 0D, or B2425 0E

1. Ignition OFF, disconnect the X4 harness connector at the K40 seat memory control module.

2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 5 and ground.

瀚慖f the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

3. Ignition OFF, connect the X4 harness connector at the K40 seat memory control module and disconnect the harness connector at the E14A

seat back heating element.

Note: Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat unoccupied, then with

the seat occupied.

4. Test for 0.5 - 5 Ohms between terminal A and terminal B.

瀚慖f not within the specified range, replace the E14A seat back heating element.

5. Connect the harness connector at the E14A seat back heating element and disconnect the X3 harness connector at the K40 seat memory

control module.

Note: Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat unoccupied, then with

the seat occupied.

6. Test for 1 - 7 Ohms between control circuit terminal 11 and control circuit terminal 6.

瀚慖f less than the specified range, test for a short between the control circuits. If the circuits test normal, replace the E14B seat cushion

heating element.

瀚慖f greater than the specified range, test the control circuits for an open/high resistance. If the circuits test normal, replace the E14B seat

cushion heating element.

7. If all circuits test normal, replace the K40 seat memory control module.

B2430 0B, B2430 0D, or B2430 0E

1. Ignition OFF, disconnect the X4 harness connector at the K40 seat memory control module.

2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 5 and ground.

瀚慖f the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

3. Ignition OFF, connect the X4 harness connector at the K40 seat memory control module and disconnect the harness connector at the E14C

seat back heating element.

Note: Element resistance must be measured twice to ensure that all failure conditions are simulated. First with the seat unoccupied, then with

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2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 239

Schematic Reference

Instrument Cluster Schematics (See: Diagrams/Electrical Diagrams/Instrument Panel, Gauges and Warning Indicators/System Diagram/Instrument

Cluster Schematics)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

Description and Operation

Instrument Cluster Description and Operation (See: Instrument Panel, Gauges and Warning Indicators/Description and Operation/Instrument

Cluster)

Driver Information Center (DIC) Description and Operation (See: Instrument Panel, Gauges and Warning Indicators/Description and

Operation/Driver Information Center (DIC))

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

Ignition ON, observe the scan tool Ambient Air Temperature parameter. The reading should be between -40掳C (-40掳F) to +88掳C (+190掳F) and

change with air temperature changes.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the B9 Ambient Air Temperature Sensor.

2. Ignition ON, test for 4.8-5.2 V between the signal circuit terminal A and ground.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the P16 Instrument

Cluster.

瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the P16 Instrument Cluster.

3. Install a 3 A fused jumper wire between the signal circuit terminal A and the low reference circuit terminal B. Verify the scan tool Ambient

Air Temperature parameter displays greater than 54 掳C (130 掳F).

瀚慖f less than the specified range, test the low reference circuit a short to voltage or an open/high resistance. If the circuit tests normal,

replace the P16 Instrument Cluster.

4. If all circuits test normal, test or replace the B9 Ambient Air Temperature Sensor.

Component Testing

Static Test

1. Test the B9 Ambient Air Temperature Sensor by varying the sensor temperature while monitoring the sensor resistance.

2. Compare the readings with the Ambient Air Temperature Sensor Resistance (See: Heating and Air Conditioning/Ambient Temperature

Sensor / Switch HVAC/Specifications).

瀚慖f not within the specified range, replace the B9 Ambient Air Temperature Sensor.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Ambient Air Temperature Gauge Sensor Replacement (See: Instrument Panel, Gauges and Warning Indicators/Outside Temperature

Display/Outside Temperature Display Sensor/Service and Repair)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for module replacement, programming and setup

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2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 685

Schematic Reference

Sunroof Schematics (See: Body and Frame/Roof and Associated Components/Sunroof / Moonroof/Diagrams/Electrical Diagrams)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

Description and Operation

Sunroof Description and Operation (See: Body and Frame/Roof and Associated Components/Sunroof / Moonroof/Description and Operation)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Testing

Note: Because of the accessibility of the sunroof switch, perform the component testing before beginning the Circuit/System Testing.

1. Ignition OFF, disconnect the harness connector at the S72 sunroof switch.

2. Scan tool not connected, doors closed, wait 5 minutes and test for less than 10 ohm between the low reference circuit terminal 1 and ground.

瀚慖f greater than the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K61

sunroof control module.

3. Ignition ON, test for 4.5-5.5 V between the reference voltage circuit terminal 4 and ground.

瀚慖f less than specified range, test the reference voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal,

replace the K61 sunroof control module.

瀚慖f greater than the specified range, test the reference circuit for a short to voltage. If the circuit tests normal, replace the K61 sunroof

control module.

4. If all circuits test normal, test or replace the S72 sunroof switch.

Component Testing

Static Test

1. Ignition OFF, disconnect the harness connector at the S72 sunroof switch.

2. Test for 3.6-3.7k ohm between the switch terminals 1 and 4.

瀚慖f not within the specified range, replace the S72 sunroof switch.

3. Test for 430-440 ohm between the signal terminal 1 and the low reference circuit terminal 4 while pressing the open switch.

瀚慖f not within the specified range, replace the S72 sunroof switch.

4. Test for 96-100 ohm between the signal terminal 1 and the low reference circuit terminal 4 while pressing the express open switch.

瀚慖f not within the specified range, replace the S72 sunroof switch.

5. Test for 1.7-1.8k ohm between the signal terminal 1 and the low reference circuit terminal 4 while pressing the close switch.

瀚慖f not within the specified range, replace the S72 sunroof switch.

6. Test for 930-940 ohm between the signal terminal 1 and the low reference circuit terminal 4 while pressing the express close switch.

瀚慖f not within the specified range, replace the S72 sunroof switch.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

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2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 728

Schematic Reference

Trailer Connector/Provision Schematics (See: Diagrams/Electrical Diagrams/Starting and Charging/Power and Ground Distribution/System

Diagram/Trailer Connector/Provision Schematics)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

Description and Operation

Exterior Lighting Systems Description and Operation (See: Lighting and Horns/Description and Operation/Exterior Lighting Systems)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

Ignition ON, observe the function of the trailer stop lamps while commanding the Trailer Stop Lamp ON and OFF with a scan tool. The trailer stop

lamps should turn ON and OFF while changing between the commanded states.

Circuit/System Testing

1. Ignition OFF, disconnect the X1 harness connector at the K68 trailer lighting control module.

2. Test for infinite resistance between the control circuit terminal 10 and ground.

瀚慖f less than the specified value, test the control circuit for a short to ground. If the circuit tests normal, replace the X88 trailer connector.

3. Test for less than 1 ohm between the control circuit terminal 10 at the K68 trailer lighting control module and control circuit terminal 6 at the

X88 trailer connector.

瀚慖f greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal,

replace the X88 trailer connector.

4. If all the circuits test normal, replace the K68 trailer lighting control module.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

Control Module References (See: Testing and Inspection/Programming and Relearning) for trailer brake control module replacement,

programming and setup

B3891

DTC B3891

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC B3891 02

- Trailer Fog Lamps Circuit Short to Ground

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2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1013

Schematic Reference

Engine Controls Schematics (LAU) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)Engine Controls Schematics

(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

1. Observe the DTC information with a scan tool.

瀚慖f there are any throttle actuator control (TAC), throttle position (TP) sensor, accelerator pedal position (APP) sensor, or fuel rail pressure

(FRP) regulator DTCs set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code

Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).

2. Operate the engine within the conditions for running the DTCs for 1 minute. DTC P0506, P0507, or P050A should not set.

3. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the

conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

Engine operating, command the engine speed up to 1,400 RPM, down to 600 RPM, up to 1,400 RPM, and then exit using the scan tool. The engine

speed should steadily increase and decrease as commanded.

If the idle does not increase or decrease steadily, verify that none of the following conditions is present:

* Vacuum leaks

* The throttle valve for the correct operation-A throttle valve that does not close correctly sets this DTC.

* Restricted air intake system

* The throttle body for damage and/or tampering

* Incorrect or malfunctioning PCV system

* Excess deposits in the throttle body

* A parasitic load on the engine-For example, a transmission condition, a belt driven accessory condition

瀚慠epair the condition as necessary.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

P050C

DTC P0116 or P050C (LAU)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.