Initial Inspection - Module Controlled

NOTE: Before starting electrical diagnosis, check for mechanical binds by manually operating the door locks. Operate lock system several times from each switch while observing the operation of all door locks. Be sure battery is fully charged.

1. Verify the customer concern by operating the system.

Visual Inspection Chart:

2. Visually inspect for obvious signs of mechanical and electrical damage.
3. If the concern remains after the inspection, connect the diagnostic tool to the Data Link Connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the diagnostic tool menu. If diagnostic tool does not communicate with the vehicle:
^ check that the program card is correctly installed.
^ check the connections to the vehicle.
^ check the ignition switch position.
4. If diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool manual.
5. Carry out the DATA LINK DIAGNOSTICS test. If diagnostic tool responds with:
^ CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to Module Communications Network (Information Bus).
^ NO RESP/NOT EQUIP for the DDM, refer to Multifunction Electronic Control Module (General Module).
^ NO RESP/NOT EQUIP for the LCM, refer to Multifunction Electronic Control Module (General Module).
^ SYSTEM PASSED, retrieve and record the continuous Diagnostic Trouble Codes (DTCs), erase the continuous DTCs and carry out self-test diagnostics for the DDM and LCM.
6. If the DTCs retrieved are related to the concern, go to the DDM Diagnostic Trouble Code (DTC) Index or LCM Diagnostic Trouble Code (DTC) Index to continue diagnostics. DDM Diagnostic Trouble Code (DTC) Index LCM Diagnostic Trouble Code (DTC) Index
7. If DTCs are retrieved that are not found in the following DDM Diagnostic Trouble Code (DTC) Index or LCM Diagnostic Trouble Code (DTC) Index, refer to the master DDM Diagnostics Trouble Code (DTC) Index or LCM Diagnostic Trouble Code (DTC) Index in Multifunction Electronic Control Module (General Module).
8. If no DTCs related to the concern are retrieved, proceed to the Symptom Chart to continue diagnostics. Module Controlled