2010 Cadillac CTS Sedan AWD V6-3.6L Page 491

Circuit/System Description

The power liftgate handle switch circuit provides a single input to the liftgate module (LGM). The liftgate handle switch is supplied a signal

voltage, when the switch contact closes, the LGM detects the voltage drop and commands the liftgate to open.

Conditions for Running the DTC

The system voltage is 9-16 volts.

Conditions for Setting the DTC

The Liftgate Open Signal circuit is active for greater than 10 minutes.

Action Taken When the DTC Sets

The liftgate will be inoperative in the power mode and the manual mode.

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

Note: Before testing can be performed, the liftgate must be opened. 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.

Whenever the LGM loses power or is disconnected, the ignition must be cycled OFF then ON in order to reactivate the LGM.

Reference Information

Schematic Reference

Liftgate Schematics (See: Body and Frame/Locks/Diagrams/Electrical Diagrams/Liftgate Schematics)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Description and Operation

Liftgate Description and Operation (See: Body and Frame/Doors, Hood and Trunk/Trunk / Liftgate/Description and Operation/Liftgate

Description and Operation)

Electrical Information Reference

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit

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