Scan Tool Testing and Procedures

1. 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 the 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.
2. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool manual.

NOTE: The Audio Unit must be in AM, FM1, or FM2 mode to enter the diagnostic tool.

3. Carry out the DATA LINK DIAGNOSTIC TEST. Pinpoint Test PC (Precheck)
If the 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 audio unit, refer to Radio, Stereo, and Compact Disc.
^ NO RESP/NOT EQUIP for Cellular Phone Module (CPM), go to Pinpoint Test A. Test A: No Communication With Cellular Phone Module (CPM)
^ SYSTEM PASSED, retrieve and record the continuous Diagnostic Trouble Codes (DTCs), erase the continuous DTCs, and carry out self-test diagnostics for the CPM.
4. If the DTCs retrieved are related to the concern, go to the Audio Unit Diagnostic Trouble Code (DTC) Index Audio Unit Diagnostic Trouble Code (DTC) Index
or to the CPM Diagnostic Trouble Code (DTC) Index to continue diagnostics. Cellular Phone Module (CPM) Diagnostic Trouble Code (DTC) Index
5. If no DTCs related to the concern are retrieved, proceed to the Symptom Chart to continue diagnostics. Symptom Related Diagnostic Procedures