Component Function Check
WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK REFRIGERANT PRESSURE SENSOR FUNCTION
- Start engine and warm it up to normal operating temperature.
- Turn A/C switch and blower fan switch ON.
- Check the voltage between ECM harness connector terminals as per the following.
ECM
Condition
Voltage
+
-
Connector
Terminal
Connector
Terminal
F78
70
(Refrigerant pressure sensor signal)
F79
97
[Engine is running]
- Warm-up condition
- Idle speed
- Both A/C switch and blower fan motor switch: ON (Compressor operates)
1.0 - 4.0 V
Is the inspection result normal?
YES
INSPECTION END
NO
Proceed to Diagnosis Procedure .