2010 Cadillac Truck SRX FWD V6-3.0L Page 262

2010 Cadillac Truck SRX FWD V6-3.0L Page 262

Repair Instructions

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

programming

With KA6

DTC B242A (With KA6)

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 B242A 01

- Seat Heaters Common Circuit Short to Battery

DTC B242A 02

- Seat Heaters Common Circuit Short to Ground

Diagnostic Fault Information

Circuit/System Description

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

B242A 01

The rear seat heating control module detects a short to voltage on the heater element control circuits

B242A 02

The rear seat heating control module detects a short to ground on the heater element control circuits.