2010 Cadillac Truck SRX AWD V6-3.0L Page 544

2010 Cadillac Truck SRX AWD V6-3.0L Page 544

and programming

With KA6

DTC B2425 or B2430 (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 B2425 0B

- Left Seat Cushion Heater Circuit High Current

DTC B2425 0D

- Left Seat Cushion Heater Circuit High Resistance

DTC B2425 0E

- Left Seat Cushion Heater Circuit Low Resistance

DTC B2430 0B

- Right Seat Cushion Heater Circuit High Current

DTC B2430 0D

- Right Seat Cushion Heater Circuit High Resistance

DTC B2430 0E

- Right Seat Cushion Heater Circuit Low Resistance

Diagnostic Fault Information

Circuit/System Description

The left and right rear heated seats are controlled by the rear seat heating control module that is located behind the rear seat back cushion. When a

rear heated seat is active, the module applies power through a common voltage supply circuit to the seat heater elements. The module controls the

seat temperature by providing a pulse width modulation (PWM) ground through the seat heater element control circuit to the heater elements. The

module then monitors the current flow through the heating elements and the rate of change of the temperature sensor to verify correct heated seat

operation.

Conditions for Running the DTC

* DTC B1325 must not be present.

* The engine must be running.

* The rear seat heating control module must be powered and the heated seat must be enabled.