Scan Tool Diagnostics

1. If the concern remains after the inspection, connect the scan tool to the Data Link Connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the scan tool menu. If the scan 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.
2. If the scan tool still does not communicate with the vehicle, refer to the scan tool manual.
3. Carry out the DATA LINK DIAGNOSTIC TEST. Pinpoint Test PC (Precheck)
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 Hybrid Electronic Cluster (HEC), go to Pinpoint Test A. Test A: No Communication With The Hybrid Electronic Instrument Cluster (HEC)
^ NO RESP/NOT EQUIP for Generic Electronic Module (GEM), go to Pinpoint Test B. Test B: No Communication With The Generic Electronic Module (GEM)
^ SYSTEM PASSED, retrieve and record the continuous Diagnostic Trouble Codes (DTCs), erase the continuous DTCs and carry out self-test diagnostics for the HEC and GEM.
4. If the DTCs retrieved are related to the concern, go to the HEC Diagnostic Trouble Code (DTC) Index, or the GEM Diagnostic Trouble Code (DTC) Index to continue diagnostics. HEC Diagnostic Trouble Code (DTC) Index GEM Diagnostic Trouble Code (DTC) Index
5. If no DTCs related to the concern are retrieved, proceed to the HEC Dealer Test Mode to continue diagnostics. Instrument Cluster