2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2336

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2336

5. Ignition ON, connect a 3A fused jumper wire between terminal 3 on the DT-47825-10 - jumper harness and ground at the transmission case.

Verify with a scan tool the Park/Neutral parameter displays Park/Neutral.

瀚慖f the Park/neutral parameter displays In Gear, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the

K20 ECM.

6. Ignition OFF, disconnect the DT-47825-10 - jumper harness from the X1 vehicle harness connector.

7. Connect the X1 vehicle harness connector to the Q8 control solenoid valve assembly.

8. Remove the transmission fluid pan. Refer to Automatic Transmission Fluid, Fluid Pan and/or Filter Replacement ().

9. Disconnect the B15 automatic transmission internal mode switch electrical connector from the K71 TCM.

10. Ignition ON, test for 11-13 volts between terminal F on the K71 TCM and ground at the transmission case.

瀚慖f not within the specified range, replace the Q8 control solenoid valve assembly.

11. If all circuits test normal, replace the B15 automatic transmission internal mode switch.

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 or ECM

replacement, setup, and programming.

Note: If the IMS switch has been replaced, inspect the valve body detent spring to be sure it is centered over the detent lever. This prevents

the detent spring from hitting the IMS switch.

* Manual Shift Shaft Position Switch Replacement (See: Powertrain Management/Computers and Control Systems/Sensors and Switches -

Computers and Control Systems/Transmission Position Sensor/Switch/Service and Repair/6L45/6L50/6L80/6L90 - Automatic Transmission

)for IMS replacement.

P0856

DTC C0242 or P0856

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 C0242 00

- Engine Control Module (ECM) Indicated TCS Malfunction

DTC P0856

- Traction Control Torque Request Circuit

Circuit/System Description

The electronic brake control module (EBCM) and the engine control module (ECM) simultaneously control the traction control. The EBCM sends

a serial data message to the ECM requesting torque reduction. When certain ECM DTCs are set, the ECM will not be able to perform the torque

reduction for traction control. A serial data message is sent to the EBCM indicating that traction control is not allowed.

Conditions for Running the DTC

Engine running.

Conditions for Setting the DTC

The ECM detects a fault that prevents it from performing a traction control function and sends a serial data message to the EBCM indicating that

torque reduction is not allowed.

Action Taken When the DTC Sets

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2242

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2242

5. Ignition ON, observe the scan tool EC Ignition Relay Feedback Signal parameter. The ECM should communicate, and the parameter should

display 9-14 V.

瀚慖f not the specified range, or the ECM does not communicate, test the ignition voltage circuit between the powertrain relay and the ECM

for a short to ground or for an open/high resistance. If the circuit/connections test normal, replace the K20 ECM.

6. Ignition OFF, verify that a test lamp does not illuminate between the control circuit terminal 86 and B+.

瀚慖f the test lamp illuminates, test the control circuit for a short to ground. If the circuit tests normal, replace the K20 ECM.

7. Connect a DMM set to the diode setting between the control circuit terminal 86 and ground.

8. Ignition ON, verify the DMM does not display OL.

瀚慖f the DMM displays OL, test the control circuit for a short to voltage, or an open/high resistance. If the circuit tests normal, replace the

K20 ECM.

9. If all circuits test normal, replace the KR75 powertrain relay.

Component Testing

Note: Depending on the application, the relay coil resistance will be within one of the following ranges.

1. Test for one of the following resistance specifications between terminals 85 and 86 of the KR75 powertrain relay:

* 70-100 ohm

* 200-250 ohm

瀚慖f not within the specified range, replace the KR75 powertrain relay.

2. Test for the infinite resistance between the following terminals to the KR75 powertrain relay:

* 30 and 86

* 30 and 87

* 30 and 85

* 85 and 87

瀚慖f not the specified value, replace the KR75 powertrain relay.

3. Install a 20 A fused jumper wire between relay terminal 85 and 12 V. Install a jumper wire between relay terminal 86 and ground. Test for

less than 2 ohm between terminals 30 and 87.

瀚慖f greater than the specified range, replace the KR75 powertrain relay.

Repair Instructions

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

* 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

Distribution Relay/Service and Repair/Relay Replacement (Within an Electrical Center))

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

P0700

DTC P0700

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 of the diagnostic category.

DTC Descriptor

DTC P0700

- Transmission Control Module (TCM) Requested MIL Illumination

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2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 322

5. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 3 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.

6. Test for less than 1V between the signal circuit terminal 1 and ground.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage.

7. Ignition OFF, test for infinite resistance between the signal circuit terminal 1 and ground.

瀚慖f not the specified value, test the signal circuit for a short to ground. If the circuit tests normal, test or replace the S43 ultrasonic intrusion

sensor disable switch.

8. Content theft disable switch closed, test for less than 10ohm between the signal circuit terminal 1 and ground.

瀚慖f greater than the specified range, test the signal circuit for an open/high resistance. If the circuit tests normal, test or replace the S43

ultrasonic intrusion sensor disable switch.

9. Ignition ON, verify the content theft disable indicator is not illuminated.

瀚慖f the indicator is illuminated, test the control circuit terminal 2 for a short to voltage.

10. Install a 3A fused jumper wire between the control circuit terminal 2 and B+. Verify the content theft disable indicator is illuminated.

瀚慖f the indicator is not illuminated, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or

replace the S43 ultrasonic intrusion sensor disable switch.

11. Disconnect the X6 harness connector at the K9 BCM.

12. Test for less than 1V between the serial data circuit terminal 16 and ground.

瀚慖f greater than the specified range, test the serial data circuit for a short to voltage.

13. Ignition OFF, test for infinite resistance between the serial data circuit terminal 16 and ground.

瀚慖f not the specified value, test the serial data circuit for a short to ground.

14. Test for less than 2ohm between the serial data circuit terminal 16 at the K9 BCM harness connector X6 and the serial data circuit terminal 4

at the B67 ultrasonic intrusion sensor harness connector.

瀚慖f greater than the specified range, test the serial data circuit for an open/high resistance.

15. If all circuits test normal, replace the B67 ultrasonic intrusion sensor. Verify DTC B291B is not set.

瀚慖f the DTC is set, replace the K9 BCM.

Repair Instructions

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

* Theft Deterrent Sensor Replacement (See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Antitheft Motion

Sensor/Service and Repair)

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

B297B

DTC B297B or B297C

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.