2010 Cadillac CTS Sedan AWD V6-3.6L Page 630
Circuit/System Description
The exterior door handle switch signal circuit provides inputs to their respective door lock/window switch and to the keyless entry control module
when the exterior door handle switch is activated. This input allows the door lock/window switch and the keyless entry control module to detect a
door open request. The door lock/window switch and the keyless entry control module provides voltage to the exterior door handle switch via the
front door handle switch signal circuit. When the front door handle is activated, the switch closes and the voltage signals from the door
lock/window switch and the keyless entry control module are pulled to ground.
Conditions for Running the DTC
Battery voltage is between 9-16 V.
Conditions for Setting the DTC
The keyless entry control module detects the driver exterior door handle switch signal circuit is shorted to ground or closed for greater than 180
seconds.
Action Taken When the DTC Sets
The keyless entry control module ignores inputs from the driver exterior door handle switch.
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.
Reference Information
Schematic Reference
Door Lock/Indicator Schematics (See: Body and Frame/Locks/Diagrams/Electrical Diagrams/Door Lock/Indicator Schematics)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Power Door Latch Description and Operation (See: Body and Frame/Locks/Description and Operation)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit
Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
With the doors closed and locked, approach the vehicle with the keyless entry transmitter and pull the exterior left front door handle. The driver
door should unlock and unlatch allowing the door to be pulled open.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the B27D door handle switch-driver.
2. Test for less than 30ohm between the ground circuit terminal listed below and ground.
* Ground circuit terminal 1
