Initial Inspection and Diagnostic Overview

1. Verify the customer concern by operating the system.
2. Visually inspect for obvious signs of mechanical and electrical damage.

Visual Inspection Chart:

3. If an obvious cause for an observed of reported concern is found, correct the cause (if possible) before proceeding to the next step.
4. If the scan tool does not power up, refer to the scan tool manual.
5. Carry out the DATA LINK DIAGNOSTICS test. If the scan 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 GEM, Refer to Multifunction Electronic Control Module (General Module).
^ SYSTEM PASSED, retrieve and record the continuous Diagnostic Trouble Codes (DTCs), erase the continuous DTCs, if the concern is with the front system, If the concern is with the rear wiper/washer system, carry out the GEM rear wiper/washer test.
6. If the DTCs retrieved are related to the concern, go to the GEM Diagnostic Trouble Code (DTC) Index to continue diagnostics. Diagnostic Trouble Code Tests and Associated Procedures
7. If no DTCs related to the concern are retrieved, proceed to Symptom Chart to continue diagnostics. Testing and Inspection
8. If the DTCs are retrieved that are not found in the following GEM Diagnostic Trouble Code (DTC) Index, refer to the master GEM Diagnostic Trouble Code (DTC) Index in Multifunction Electronic Control Module (General Module).