Power Locks: Testing and Inspection

POWER LOCK & REMOTE KEYLESS ENTRY SYSTEM
The following tests include a preliminary diagnosis for the power lock system used only on vehicles equipped with the optional Remote Keyless Entry (RKE) system, which includes a high-line or premium Central Timer Module Body Control Module (CTM). These tests do not apply to the diagnosis of the power lock system on vehicles equipped with a base version of the CTM. (Refer to POWER LOCKS - DIAGNOSIS AND TESTING - POWER LOCK SYSTEM Power Locks).

These tests 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 and RKE system, the Chrysler Collision Detection (CCD) Information Bus data bus network and all of the electronic modules that provide inputs to, or receive outputs from the power lock and RKE system components must be checked.

The most reliable, efficient, and accurate means to diagnose the power lock and RKE system requires the use of a DRBIII scan tool. The DRBIII scan tool can provide confirmation that the CCD data bus is functional, that all of the electronic modules are sending and receiving the proper messages on the CCD data bus, that the CTM is receiving the proper hard wired inputs, and that the power lock motors are being sent the proper hard wired outputs by the CTM.

Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness connectors, splices and grounds.

Preliminary Tests
To begin this test, note the system operation while you actuate both the Lock and Unlock functions with the power lock switches, the door cylinder lock switches, and the RKE transmitter. Then, proceed as follows:

* If the entire power lock system fails to function with the power lock switches, the door cylinder lock switches, or the RKE transmitter, check the fused B(+) fuse in the Junction Block (JB). If the fuse is OK, proceed to the diagnosis of the power lock motors. (Refer to POWER LOCKS/ POWER LOCK MOTOR - DIAGNOSIS AND TESTING Power Door Lock Actuator).

* If the power lock system functions with both power lock switches, and both door cylinder lock switches, but not with the RKE transmitter, proceed to the diagnosis of the transmitter. (Refer to POWER LOCKS/REMOTE KEYLESS ENTRY TRANSMITTER - DIAGNOSIS AND TESTING Keyless Entry Transmitter).

* If the entire power lock system functions with the RKE transmitter, and both door cylinder lock switches, but not with one or both of the power lock switches, proceed to diagnosis of the power lock switches. (Refer to POWER LOCKS/POWER LOCK SWITCH - DIAGNOSIS AND TESTING Power Door Lock Switch).

* If the entire power lock system functions with the RKE transmitter, and both power lock switches, but not with one or both of the door cylinder lock switches, proceed to diagnosis of the door cylinder lock switches. (Refer to POWER LOCKS/DOOR CYLINDER LOCK SWITCH - DIAGNOSIS AND TESTING Power Door Lock Switch).

* If one power lock motor fails to operate with both of the power lock switches, both of the door cylinder lock switches and/or the RKE transmitter, proceed to diagnosis of the power lock motor. (Refer to POWER LOCKS/POWER LOCK MOTOR - DIAGNOSIS AND TESTING Power Door Lock Actuator).

* If the problem being diagnosed is related to one or more of the electronic features (automatic locks, door lock inhibit, enhanced accident response, illuminated entry, panic mode, or RKE horn chirp), further diagnosis should be performed using a DRB III scan tool. Refer to the appropriate diagnostic information.

* Body Control Module
* Information Bus