Inspection and Verification

WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Verify the service disconnect plug is correctly inserted and locked into the LOCK position.

Verify the customer concern.

Visually inspect for obvious signs of mechanical or electrical damage.

VISUAL INSPECTION CHART

Mechanical	Electrical
A/C compressor Broken or binding door/actuator Broken or leaking refrigerant lines Obstructed in-vehicle temperature/humidity sensor	Battery Junction Box (BJB) fuse(s): 3 (10A) 12 (40A) 14 (10A) Smart Junction Box (SJB) fuse(s): 15 (10A) 45 (5A) Circuitry

If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.

NOTE: Make sure to use the latest scan tool software release.

If the cause is not visually evident, connect the scan tool to the Data Link Connector (DLC).

NOTE: The Vehicle Communication Module (VCM) LED prove-out confirms power and ground from the DLC are provided to the VCM .

If the scan tool does not communication with the VCM:
- check the VCM connection to the vehicle.
- check the scan tool connection to the VCM .
- refer to PINPOINT TESTS , No Power To The Scan Tool, to diagnose no power to the VCM .
If the scan tool does not communicate with the vehicle:
- verify the ignition key is in the ON position.
- verify the scan tool operation with a known good vehicle.
- refer to PINPOINT TEST A: THE PCM DOES NOT RESPOND TO THE SCAN TOOL to diagnose no response from the PCM.
Carry out the network test.
- If the scan tool responds with no communication from one or more modules, refer to PINPOINT TEST T: NO HIGH SPEED CONTROLLER AREA NETWORK (HS-CAN) COMMUNICATION, ALL MODULES ARE NOT RESPONDING .
- If the network test passes, retrieve and record the Continuous Memory Diagnostic Trouble Codes (CMDTCs).
Clear the CMDTCs and carry out the self-test diagnostics for the HVAC, Air Conditioning Compressor Module (ACCM), Instrument Panel Cluster (IPC) or PCM.
If the HVAC DTCs retrieved are related to the concern, go to the HVAC MODULE DTC CHART . If the ACCM DTCs retrieved are related to the concern, go to the AIR CONDITIONING COMPRESSOR MODULE (ACCM) DTC CHART . If the PCM DTCs retrieved are related to the concern, go to the PCM DTC CHART . For all other DTCs, refer to DIAGNOSTIC TROUBLE CODE (DTC) CHART .

If no DTCs are present, GO to SYMPTOM CHART - CLIMATE CONTROL SYSTEMS for the appropriate diagnostic action.