2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 262
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
Control Module References (See: Testing and Inspection/Programming and Relearning) for seat memory control module replacement, setup, and
DTC B242A (With KA6)
* 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 B242A 01
- Seat Heaters Common Circuit Short to Battery
DTC B242A 02
- Seat Heaters Common Circuit Short to Ground
Diagnostic Fault Information
The rear seat heating control module controls seat heating operation for both left and right rear seats. The heating elements are controlled through
individual high side and low side control circuits. The low side control circuits for both seats are connected to a common reference point internal to
the module. This reference point is biased to approximately 2.5 V. Before the rear seat heating control module will allow heated seat operation, it
checks to see if this biased voltage is shorted to ground or voltage. Once the module verifies that it is not closing to a shorted heating element, it
allows for heated seat operation. The module will then continue to monitor the heating elements for a shorted circuit.
Conditions for Running the DTC
* DTC B1325 must not be present.
* The rear seat heating control module must be powered.
Conditions for Setting the DTC
The rear seat heating control module detects a short to voltage on the heater element control circuits
The rear seat heating control module detects a short to ground on the heater element control circuits.