2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 248
2. Ignition ON, verify that a test lamp illuminates between the wake up signal circuit terminal 3 and ground.
瀚慖f the test lamp does not illuminate, test the circuit for a short to ground or an open/high resistance.
3. Ignition OFF and scan tool disconnected, verify that a test lamp does not illuminate between the signal circuit terminal 3 and ground.
瀚慖f the test lamp illuminates, test the circuit for a short to voltage.
4. If all circuits test normal, replace the APM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* GMLAN Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Wiring Repairs/GMLAN Wiring Repairs)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for module replacement, setup, and programming
B153A
DTC B153A
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 B153A 00
- Liftgate Latch Switch Signal Circuit
DTC B153A 08
- Liftgate Latch Switch Signal Circuit Signal Invalid
Diagnostic Fault Information
