Compressor Clutch Relay: Testing and Inspection

Compressor Cut-Off Relay

Color Code Legend:

Checking ECU Ground Connections:

1. Turn ignition OFF.
2. Access fuel injection ECU by removing the passenger side kick panel and glove compartment.
3. Check fuel injection ECU ground connections. They should make good contact and fit tight.

Removing ECU Connector:

4. Remove fuse #1 (located in central electric unit behind ash tray) to interrupt the power supply. Then remove the ECU connector by pressing up the latch and folding out the wire cluster.

Removing Protective Sleeve:

5. Remove connector protective sleeve and reinstall fuse #1 for testing.
CAUTION: ^ Never check connections from the front. Connectors can get damaged and worsen the problem.
^ Check connections through the holes in the connector.
^ Connection pin numbers are printed on the connector side.
6. Disconnect A/C cut-out relay.
7. Measure resistance between ECU connector pin 14 and A/C cut-out relay terminal connector #2.

Reading: 0 ohm

If resistance is different, repair wire from ECU to relay. If wire is O.K. and an A/C system fault is suspected, see HEATING VENTILATION AND AIR CONDITIONING for testing of A/C system.
8. Disconnect the test equipment. Remove the #1 fuse and reconnect the ECU and all other connectors, install the kick panel and glove compartment. Ensure that the rubber seal in the ECU connector is installed before it is connected to the unit.
9. Reinstall the #1 fuse.