Faulty Signal

ECM-500A AIR CONDITIONING (A/C) PRESSURE SENSOR
FAULTY SIGNAL

Checking the air conditioning (A/C) pressure sensor



- Check cable between air conditioning (A/C) relay and air conditioning (A/C) compressor magnetic clutch for an intermittent open-circuit according to [1][2]Checking Wiring and Terminals. Intermittent Faults
- Check the pressure in the air conditioning (A/C) system.

- To localize the air conditioning (A/C) pressure sensor, Locations
- To access/replace air conditioning (A/C) pressure sensor, Pressure Switch/Pressostat, Replacing


Verification



Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off.
- Reconnect connectors, reinstall components
- Ignition on.
- Read air conditioning (A/C) pressure sensor signal.

The signal should be between 0.7 - 0.9 V.

Is the signal OK?
Yes - Testing Complete.
No - Continue below.


Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.