2010 Cadillac Truck SRX AWD V6-3.0L Page 205
* 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 B0978 01
- Power Mode Accessory Indicator Control Circuit Short to Battery
DTC B0978 02
- Power Mode Accessory Indicator Control Circuit Short to Ground
DTC B0978 04
- Power Mode Accessory Indicator Control Circuit Open
DTC B097B 00
- Power Mode Start Switch Circuit Malfunction
DTC B097B 02
- Power Mode Start Switch Circuit Short to Ground
DTC B097B 04
- Power Mode Start Switch Circuit Open
DTC B097B 08
- Power Mode Start Switch Circuit Performance - Signal Invalid
DTC B097B 61
- Power Mode Start Switch Circuit - Stuck
DTC B097C 01
- Power Mode Run/Start Circuit Indicator Short to Battery
DTC B097C 02
- Power Mode Run/Start Circuit Indicator Short to Ground
DTC B097C 04
- Power Mode Run/Start Indicator Circuit Open
Circuit/System Description
The ignition mode switch has 2 LED's that indicate the vehicle power mode. When the vehicle is in the off mode, both LED's will be off. Pressing
the ignition mode switch button once (without the brake pedal applied), the vehicle enters the accessory mode and the amber LED (ACC) will
illuminate. Pressing the ignition mode switch button a second time (without the brake pedal applied), the vehicle enters the run/start mode (without
the engine running) and the green LED (Run/Start) will illuminate. With the ignition off (with the brake pedal applied), pressing the ignition mode
switch button once, the vehicle will enter run/start mode and the green LED (run/start) will illuminate. This will start the engine. Both LED's have
the voltage supplied from the body control module (BCM). The ignition mode switch sends the ignition mode switch status to the passive entry
passive start module (PEPS) and to the BCM. The PEPS module sends a redundant signal to the BCM with the ignition mode switch status.
Conditions for Running the DTC
Voltage supplied to the module is in the normal operating voltage range of 9-16 V.
Conditions for Setting the DTC
B0978, B097C 01
* The BCM detects a short to battery in the respective indicator control circuit, when the output is active.
* The above condition exists for more than 1 second.
B0978, B097B, B097C 02
* The BCM detects a short to ground in the respective circuit, when the output is inactive.
* The above condition exists for more than 1 second.
B0978, B097B, B097C 04
* The BCM detects an open in the respective circuit, when the output is inactive.
* The above condition exists for more than 1 second.
B097B 00
* The BCM detects a difference between the ignition mode switch voltages to the BCM and PEPS module.
* The above condition exists for more than 1 second.
