2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 248

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