Inspection and Verification: Notes

WARNING: This page is about a different car, the 2007 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.

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

Inspect to determine if one of the following mechanical or electrical concerns apply:

VISUAL INSPECTION CHART

Mechanical	Electrical
Loose, missing or damaged A/C compressor drive belt Loose or disconnected A/C clutch Broken or binding door/actuator Loose, misrouted or damaged vacuum lines^a Broken or leaking vacuum control motor^a Broken or leaking refrigerant lines	Smart junction box (SJB) fuse: 27 (10A) Battery junction box (BJB) fuses: 13 (30A) 25 (10A) Blower motor inoperative A/C compressor inoperative Circuit open/shorted Disconnected electrical connectors

^a A leak in the vacuum control circuit may occur during acceleration (slow leak), may exist at all times (large leak) and may exist only when specific functions are selected (indicating a leak in that portion of the circuit). The vacuum hoses used in the passenger compartment control circuit are constructed from PVC plastic material. The vacuum hoses used in the engine compartment are constructed of Hytrel®. Because of the materials used, never pinch the vacuum hoses off during diagnosis to locate a leak. A wood golf tee can be used as a plug when it is necessary to plug one end of the vacuum hose for leak test purposes.

If the inspection reveals obvious concern(s) that can be readily identified, repair as required.

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 communicate with the VCM:
- check the VCM connection to the vehicle.
- check the scan tool connection to the VCM.
- refer to MODULE COMMUNICATIONS NETWORK article, No power to the scan tool, to diagnose no communication with the scan tool.
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 MODULE COMMUNICATIONS NETWORK article to diagnose no response from the powertrain control module (PCM).
Carry out the network test.
- If the scan tool responds with no communication for one or more modules, refer to MODULE COMMUNICATIONS NETWORK article.
- If the network test passes, retrieve and record continuous memory diagnostic trouble codes (DTCs).
Clear the continuous DTCs and carry out the self-test diagnostics for the PCM.

NOTE: Some PCM DTCs may inhibit air conditioning (A/C) operation. If any PCM DTCs are retrieved, diagnose those first. REFER to the INTRODUCTION - GASOLINE ENGINES article.

If the DTCs retrieved are related to the concern, go to INTRODUCTION - GASOLINE ENGINES article.

If no DTCs related to the concern are retrieved, go to Symptom Chart .

POWERTRAIN CONTROL MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX

DTC	Description	Action
P1460	Wide Open Throttle A/C Primary Circuit Malfunction	REFER to the INTRODUCTION - GASOLINE ENGINES article.
P1464	A/C Demand Out Of Self-Test Range	REFER to the INTRODUCTION - GASOLINE ENGINES article.
P1469	Low A/C Cycling Period	REFER to the INTRODUCTION - GASOLINE ENGINES article.