3. Ignition ON, rear audio ON, test for 10.0-11.0 volts between the supply voltage circuit terminal 4 and ground.
锟斤拷 If 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.
锟斤拷 If 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.
Conditions for Setting the DTC
B1453 01
Run and Crank/On and Start Power Circuit is more than 2.5 volts.
