Without 7 Inch Display

ECV (ELECTRICAL CONTROL VALVE)

Description

The ECV (electrical control valve) is installed on the compressor and controls it for emitting appropriate amount of refrigerant when necessary.


Diagnosis Procedure


1. CHECK FUSE

Check 10A fuse [No. 3, located in the fuse block (J/B)].
NOTE:
Fuse Block - Junction Box (J/B).
Is the inspection result normal?
YES- GO TO 2.
NO- Replace the fuse after repairing the applicable circuit.

2. CHECK ECV POWER SUPPLY CIRCUIT

1.Turn the ignition switch OFF.
2.Disconnect the ECV connector.
3.Turn the ignition switch ON.
4.Check voltage between the ECV harness connector and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- Repair the harnesses or connectors.

3. CHECK ECV CONTROL SIGNAL

With CONSULT
1.Turn the ignition switch OFF.
2.Connect the ECV connector.
3.Perform the "HVAC TEST": MODE 5 of HVAC active test mode.
4.Check output waveform between the A/C auto amp. harness connector and ground with the oscilloscope.





Is the inspection result normal?
YES- Replace the compressor.
NO- GO TO 4.

4. CHECK CONTINUITY BETWEEN ECV AND A/C AUTO AMP.

1.Turn the ignition switch OFF.
2.Disconnect the ECV connector.
3.Disconnect the A/C auto amp. connector.
4.Check continuity between the ECV harness connector and A/C auto amp. harness connector.





5.Check for continuity between the ECV harness connector and ground.





Is the inspection result normal?
YES- GO TO 5.
NO- Repair the harnesses or connectors.

5. CHECK ECV

Check continuity between the ECV connector terminals.





Is the inspection result normal?
YES- Replace the A/C auto amp.
NO- Replace the compressor.