2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 480

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 480

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the infrared module.

2. Ignition OFF, test for less than 5.0 ohms between the ground circuit terminal 12 and ground.

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

3. Ignition ON, rear audio ON, test for 10.0-11.0 volts between the supply voltage circuit terminal 4 and ground.

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

replace the rear audio/HVAC module.

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

audio/HVAC module.

4. If all circuits test normal, replace the infrared module.

Repair Instructions

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

* Audio System Transceiver Module Replacement (See: Accessories and Optional Equipment/Radio, Stereo, and Compact

Disc/Radio/Stereo/Service and Repair/Audio System Transceiver Module Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for Rear Audio/HVAC Module replacement, setup,

and programming

B1453

DTC B1453

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 B1453 01

- Run and Crank/On and Start Power Circuit - Short to Battery

DTC B1453 06

- Run and Crank/On and Start Power Circuit - Short to Ground or Open

Diagnostic Fault Information

Circuit/System Description

The Run and Crank/On and Start Power signal connects the Serial Data Gateway Module (SDGM) along with numerous other modules to the

vehicle 12-volt system through a fused relay in the fuse block - underhood. This relay is closed by the Body Control Module (BCM) based on the

key being in either the Run or Crank position.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

B1453 01

Ignition is in ACC position.

B1453 06

Ignition is in RUN position.