## Air Conditioning

#### Radiator and Condenser Fans Common Circuit Troubleshooting (cont'd)

21-76

Compressor Clutch Circuit Troubleshooting

9. Measure the voltage between the No. 6 terminal of ECM/PCM connector B (24P) and body ground with the ECM/PCM connectors connected.

ECM/PCM CONNECTOR B (24P)

Wire side of female terminals

Is there battery voltage?

YES - Check for loose wires or poor connections at ECM/PCM connector B (24P). If the connections are good, substitute a known-good ECM/PCM and recheck. If the symptom/indication goes away, replace the original ECM/PCM.

NO - Repair open in the wire between the radiator fan relay, the condenser fan relay and the ECM/PCM.

1. Check the No. 1 (20A) fuse in the under-hood fuse/relay box and the No. 14 (10A) fuse in the under-dash fuse/relay box.

Are the fuses OK?

YES - Go to step 2.

NO - Replace the fuse(s) and recheck.

2. Check the engine coolant temperature (use the Honda PGM Tester PGM-FI data list if possible).

Is the coolant temperature above normal?

YES - Troubleshoot and repair the cause of the high engine coolant temperature.

NO - Go to step 3.

3. Remove the compressor clutch relay from the under-hood fuse/relay box and test it (see page 22-80).

Is the relay OK?

YES - Go to step 4.

NO - Replace the compressor clutch relay.

4. Measure the voltage between the No. 2 terminal of the compressor clutch relay 4P socket and body ground.

COMPRESSOR CLUTCH RELAY 4P SOCKET

Is there battery voltage?

YES - Go to step 5.

NO - Replace the under-hood fuse/relay box.