Diesel Data: Automotive Repair

Compressor Clutch Relay: Testing and Inspection

MAGNETIC CLUTCH RELAY

INSPECTION
1. REMOVE BATTERY





2. REMOVE MAGNETIC CLUTCH RELAY (Marking: A/C COMP) FROM ENGINE ROOM R/B

3. INSPECT MAGNETIC CLUTCH RELAY




a. Inspect the relay continuity.
1. Using an ohmmeter, check that there is continuity between terminals 1 and 2.
If there is no continuity, replace the relay.

2. Check that there is no continuity between terminals 3 and 5.
If there is continuity, replace the relay.




b. Inspect the relay operation.
1. Apply battery positive voltage across terminals 1 and 2.
2. Using an ohmmeter, check that there is continuity between terminals 3 and 5.
If there is no continuity, replace the relay.

4. REINSTALL MAGNETIC CLUTCH RELAY

5. REINSTALL BATTERY