Friday, February 14, 2020

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 262

2010 Cadillac Truck SRX AWD V6-2.8L Turbo 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.

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