## Air Conditioning

#### Compressor Clutch Circuit Troubleshooting (cont'd)

21-20

A/C Pressure Switch Circuit Troubleshooting

1. Check for continuity between the No. 1 terminal of the compressor clutch relay 4P socket and the No. 1 terminal of the compressor clutch 1P connector.

COMPRESSOR CLUTCH RELAY 4P SOCKET

COMPRESSOR CLUTCH 1P CONNECTOR

Wire side of female terminals

Is there continuity?

YES - Check the compressor clutch clearance and the compressor clutch coil (see page 21-26).

NO - Repair open in the wire between the compressor clutch relay and the compressor clutch.

KE Model

1. Disconnect the A/C pressure switch 4P connector.

1. Turn the ignition switch ON (II).

1. Measure the voltage between the No. 1 terminal of the A/C pressure switch 4P connector and body ground.

A/C PRESSURE SWITCH 4P CONNECTOR

Wire side of female terminals

Is there battery voltage?

YES - Go to step 4.

NO - Repair open in the wire between the A/C diode A, the ECM and the A/C pressure switch.

1. Turn the ignition switch OFF.

1. Check for continuity between the No. 1 and No. 4 terminals of the A/C pressure switch.

A/C PRESSURE SWITCH

Is there continuity?

YES - Go to step 6.

NO - Go to step 10.

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