2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 422
9. Command the body control module-keyless entry control module-accessory power mode indicator test with a scan tool. The test lamp should
turn ON and OFF when changing between the commanded states.
瀚慖f the test lamp is always ON, test the control circuit for a short to voltage. If all circuits test normal, replace the K9 BCM.
瀚慖f the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If all circuits test normal, replace
the K9 BCM.
10. If all circuits test normal, replace the S38 ignition mode switch.
Component Testing
1. Ignition OFF, disconnect the harness at the S38 ignition mode switch.
2. Place a jumper wire between ignition mode switch terminal 4 and ground.
3. Place a fused jumper wire between the circuit terminals of the ignition mode switch listed below and B+:
* Ignition mode switch terminal 2
* Ignition mode switch terminal 5
瀚慖f the either LED does not light, replace the S38 ignition mode switch.
4. Without the button pressed, test for 4,870 ohm between the ignition mode switch terminals listed below:
* Ignition mode switch terminals 3 and 7
* Ignition mode switch terminals 4 and 6
瀚慖f not the specified value, replace the S38 ignition mode switch.
5. With the button pressed, test for 1,300 ohm between the ignition mode switch terminals listed below:
* Ignition mode switch terminals 3 and 7
* Ignition mode switch terminals 4 and 6
瀚慖f not the specified value, replace the S38 ignition mode switch.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Ignition and Start Switch Replacement (See: Powertrain Management/Ignition System/Sensors and Switches - Ignition System/Ignition
Switch/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, programming and setup
B1000
DTC B1000
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 B1000 XX
- Electronic Control Unit
Circuit/System Description
The internal fault detection is handled inside the control module. The symptom byte listed in the DTC Descriptor is for engineering reference only.
No external circuit diagnosis is involved.
Conditions for Running the DTC
The module runs the program to detect an internal fault when power up is commanded. The only requirements are voltage and ground. This
program runs even if the voltage is out of the valid operating range.
