Component Tests and General Diagnostics

POWER LOCKS

The most reliable, efficient, and accurate means to diagnose the power lock system requires the use of a scan tool and the proper Diagnostic Procedures information.

Refer to the appropriate wiring information.

Following are tests that will help to diagnose the hard wired components and circuits of the power lock system. However, these tests may not prove conclusive in the diagnosis of this system. In order to obtain conclusive testing of the power lock system, the CAN data bus network and all of the electronic modules that provide inputs to, or receive outputs from the power lock system components must be checked.

PRELIMINARY DIAGNOSIS

As a preliminary diagnosis for the power lock system, note the system operation while you actuate both the Lock and Unlock functions with the power lock switches and with the Remote Keyless Entry FOBIK transmitter. Then, proceed as follows:

- If the entire power lock system fails to function with either the power lock switches or the FOBIK, check the fused B(+) fuse in the Totally Integrated Power Module (TIPM).
- If the power lock system functions with both power lock switches, but not with the FOBIK, proceed to diagnosis of the Remote Keyless Entry (RKE) system. Integrated Key FOB Transmitter - Remote Keyless Entry Transmitter or Testing and Inspection.
- If the power lock system functions with the FOBIK, but not with one or both power lock switches, proceed to diagnosis of the door lock switches. .
- If the driver side power lock switch operates only the driver side front door power lock motor, but all other power lock motors operate with the passenger side power lock switch or the FOBIK, use a scan tool and the appropriate diagnostic information to diagnose the CAN data bus.