2010 Cadillac Truck SRX FWD V6-3.0L Page 361

2010 Cadillac Truck SRX FWD V6-3.0L Page 361

* 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 B396C 08

- Liftgate Mode Switch Circuit Performance Signal Invalid

DTC B396D 02

- Front Liftgate Actuator Switch Circuit Short To Ground

Diagnostic Fault Information

Circuit/System Description

The interior liftgate rotary control switch contains 3 resistors which are in series for the liftgate mode, depending upon which position is selected

will determine which combination of resistors are used. The liftgate module monitors the voltage level in the liftgate mode signal circuit, as each

mode is selected, the voltage within the signal circuit incrementally drops. It is this method the liftgate module will determine if mode switch is in

the manual mode, garage mode or the maximum open mode.

The interior liftgate control switch has of a push button switch to command the liftgate to open and close. The liftgate module monitors the voltage

level on the open/close signal circuit, when the switch is not being pressed the voltage level is at the system voltage. When the switch is pressed a

contact within the interior liftgate control switch closes providing a ground path for the signal circuit causing the voltage level to drop to near zero

volts. The liftgate module will detect the voltage drop and will then command the liftgate to open or close depending upon the current state of the

liftgate at the time the switch is pressed.

Conditions for Running the DTC

The system voltage is 9-16 V.

Conditions for Setting the DTC

B396C 08

The liftgate control module detects an out of range condition in the mode switch signal circuit.

B396D 02

The liftgate control module detects a short to ground in the rear liftgate open/close switch signal circuit for greater than 60 seconds.

Action Taken When the DTC Sets

B396C 08

The manual mode function and the garage mode function will be inoperative.

B396D 02

The liftgate module will ignore the switch input from the interior liftgate control switch and the liftgate operations will only be available from the

liftgate switches located on the liftgate panel or by an open or close request from the remote control keyless entry module.

Conditions for Clearing the DTC

* The DTC will be current for as long as the fault is present.

* When the fault is no longer present, the DTC will be a history DTC.

* A history DTC will clear after 50 ignition cycles.

Diagnostic Aids

* If the liftgate will not release from the closed position, refer to Opening the Liftgate Without Electrical Power (See: Body and Frame/Doors,

Hood and Trunk/Trunk / Liftgate/Service and Repair/Procedures) for the appropriate procedure