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Inspection and Verification

INSPECTION AND VERIFICATION

1. Verify the customer's concern by operating the climate control system to duplicate the condition.


Visual Inspection Chart:






2. Inspect to determine if one of the given mechanical or electrical concerns apply.
3. As pinpoint tests and measurements are being carried out, be sure to inspect for any disconnected, loose-fitting, or incorrectly installed component, module and inline electrical connectors and pins.
4. If the inspection reveals obvious concerns that can be readily identified, repair as necessary.
5. 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 vehicle selection cannot be entered:
- check that the program card is correctly installed.
- check the connections to the vehicle.
- check the ignition switch position.
- check that the battery voltage is greater than 9V.

If the scan tool still does not allow the vehicle selection to be entered, refer to the scan tool manual.

6. Carry out the Data Link Diagnostic Test using the scan tool. If the scan tool responds with:
- SCP+, SCP- or UBP circuits fault ALL MODULE NO RESPONSE/NOT EQUIPPED, go to Module Communication Network Diagnostics to diagnose the network concern.
- If the powertrain control module (PCM) is not listed for a communication concern, turn the A/C controls to OFF and execute the self-test diagnostics for the PCM.
- If the DATC module is not listed for a communication concern, execute the self-test diagnostics for the DATC module.

7. If any PCM or DATC DTCs are retrieved, and are related to the concern, go to the Powertrain Control Module Diagnostic Trouble Code (DTC) Index or the Dual Automatic Temperature Control (DATC) Module Diagnostic Trouble Code (DTC) Index to continue the diagnostics. Powertrain Control Module (PCM) Diagnostic Trouble Code Index Dual Electronic Automatic Temperature Control Module DTC Index
8. If no DTCs related to the concern are retrieved, GO to Symptom Chart to continue the diagnostics. Symptom Related Diagnostic Procedures
9. If the DATC module cannot be accessed by the scan tool, GO to Pinpoint Test A. Test A
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