Inspection and Verification
WARNING: This page is about a different car, the 2003 Mercury Mountaineer and 2003 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
- Verify the customer concern by operating the climate control system to duplicate the condition.
- Visually inspect for obvious signs of mechanical or electrical damage.
- As pinpoint tests and measurements are being carried out, be sure to inspect for any disconnected, loose-fitting, or incorrectly installed component, module and in-line electrical connectors and pins.
- If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
- If the cause is not visually evident, connect a diagnostic tool to the data link connector 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.
- If the diagnostic tool still does not communicate with the vehicle, Refer to Diagnostic tool operating manual.
- Carry out the DATA LINK DIAGNOSTICS test. If the diagnostic tool responds with:
- SCP+, SCP- or UBP circuits fault = ALL ECUS NO RESP/NOT EQUIP, refer to MODULE COMMUNICATIONS NETWORK 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 self-test diagnostics for the PCM.
- If the DATC module is not listed for a communication concern, execute self- test diagnostics for the DATC module.
- If any PCM or DATC DTCs are retrieved, and are related to the concern, go to DIAGNOSTIC TROUBLE CODE INDEX to continue diagnostics.
- If no DTCs related to the concern are retrieved, GO to SYMPTOM CHART to continue diagnostics.
- If the dual automatic temperature control module cannot be accessed by the diagnostic tool, GO to Pinpoint Test F.