Pinpoint Test Z: All Door Locks Are Inoperative From One Switch

Handles, Locks, Latches and Entry Systems - With Intelligent Access (IA)

Pinpoint Test Z: All Door Locks Are Inoperative From One Switch

Refer to Wiring Diagram Set 117, Remote Keyless Entry and Alarm for schematic and connector information Electrical Diagrams.

Normal Operation

The Body Control Module (BCM) sends voltage signals to the door lock control switches through the lock and unlock input circuits. When the lock or unlock switch is pressed, the corresponding voltage signal is routed to ground. The door lock control switches have a dedicated ground circuit. The BCM (Body Control Module) sends the lock or unlock request from the door lock control switch to the Remote Function Actuator (RFA) module over the Medium Speed Controller Area Network (MS-CAN).

The door lock control switches have a dedicated ground circuit.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Door lock control switch

- MS-CAN (Medium Speed Controller Area Network)

PINPOINT TEST Z : ALL DOOR LOCKS ARE INOPERATIVE FROM ONE SWITCH

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

Z1 CARRY OUT A NETWORK TEST

- Enter the following diagnostic mode on the scan tool: Network Test.

Does the RFA (Remote Function Actuator) module and BCM (Body Control Module) pass the network test?

Yes
GO to Z2.

No
REFER to Information Bus.

Z2 CHECK THE SUSPECT DOOR LOCK CONTROL SWITCH FOR CORRECT OPERATION

- Disconnect: Suspect Door Lock Control Switch.

- Carry out the door lock control switch component test.

Does the door lock control switch pass the component test?

Yes
REPAIR circuit GD133 (BK) or GD140 (BK/GN) for an open. TEST the system for normal operation.

No
INSTALL a new door lock control switch, REFER to Door Lock Control Switch - Edge or Door Lock Control Switch - MKX . TEST the system for normal operation.