Compressor Clutch Circuit Troubleshooting
Compressor Clutch Circuit Troubleshooting1. Check the No.58 (20 A) fuse in the under-hood fuse/ relay box, and the No.3 (7.5 A) fuse in the driver's 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 higher than normal?
YES - Troubleshoot and repair cause of 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.
Is the relay OK?
YES - Go to step 4.
NO - Replace the compressor clutch relay.
4. Measure the voltage between the No.1 terminal of the compressor clutch relay 4P socket and body ground.
Is there battery voltage?
YES - Go to step 5.
NO - Replace the under-hood fuse/relay box.
5. Connect the No.1 and No.2 terminals of the compressor clutch relay 4P socket with a jumper wire.
Does the compressor clutch click ?
YES - Go to step 6.
NO - Go to step 14.
6. Disconnect the jumper wire.
7. Turn the ignition switch ON (II).
8. Measure the voltage between the No.4 terminal of the compressor clutch relay 4P socket and body ground.
Is there battery voltage?
YES - Go to step 9.
NO - Repair open in the wire between the No.3 fuse in the driver's under-dash fuse/relay box and the compressor clutch relay.
9. Turn the ignition switch OFF.
10. Reinstall the compressor clutch relay.
11. Make sure the A/C switch is OFF.
12. Turn the ignition switch ON (II).
13. Using the Backprobe Set, measure the voltage between the No. 17 terminal of the PCM connector A (32P) and body ground with the PCM connectors connected.
Is there battery voltage?
YES - Check for loose wires or poor connections at the PCM connector A (32P). If the connections are good, substitute a known-good PCM, and recheck. If the symptom/indication goes away, replace the original PCM.
NO - Repair open in the wire between the compressor clutch relay and the PCM.
14. Disconnect the jumper wire.
15. Disconnect the compressor clutch 1P connector.
16. Check for continuity between the No.2 terminal of the compressor clutch relay 4P socket and the No.1 terminal of the compressor clutch 1P connector.
Is there continuity?
YES - Check the compressor clutch clearance and the compressor clutch field coil.
NO - Repair open in the wire between the compressor clutch relay and the compressor clutch.