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 (if equipped with the optional Vehicle Theft Security System (VTSS), 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 DIAGNOSIS AND TESTING-POWER LOCK MOTOR  ).
• If the power lock system functions with both power lock switches, and both the door cylinder lock switches, but not with the RKE transmitter, proceed to the diagnosis of the transmitter. (Refer to DIAGNOSIS AND TESTING-REMOTE 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 Driver Door Module (DDM) for the driver side switch or to power lock switch for the passenger side switch. (Refer to DIAGNOSIS AND TESTING-DRIVER DOOR MODULE  ) and/or (Refer to DIAGNOSIS AND TESTING-POWER LOCK SWITCH  ).
• If the entire power lock system functions with the RKE transmitter, and both power lock switches, but not with one or all of the door cylinder lock switches, proceed to diagnosis of the door cylinder lock switches. (Refer to DIAGNOSIS AND TESTING-DOOR CYLINDER LOCK SWITCH  ).
• If one power lock motor fails to operate with both of the power lock switches, all of the door cylinder lock switches, and/or the RKE transmitter, proceed to diagnosis of the power lock motor. (Refer to DIAGNOSIS AND TESTING-POWER LOCK MOTOR  ).

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