| 1. | Check the No. 11 (30A) fuse in the under-hood fuse/relay box, and the No. 22 (7.5A) fuse in the under-dash fuse/relay box. Are the fuses OK? YES - Go to 2. NO - Replace the fuse(s), and recheck.n |
| 2. | Check the engine coolant temperature throttle position, and idle speed (use the HDS PGM-FI data list if possible).
Is the coolant temperature, throttle position, and idle speed OK? YES - Go to 3. NO - Troubleshoot and repair the cause of the high engine coolant temperature, low idle, or excessively hight throttle position sensor reading.n |
| 3. | Remove the compressor clutch relay from the under-hood fuse/relay box, and test it. Is the relay OK? YES - Go to 4. NO - Replace the compressor clutch relay.n |
| 4. | Measure the voltage between the No. 2 terminal of the compressor clutch relay 5P socket and body ground.
Is there battery voltage? YES - Go to 5. NO - Replace the under-hood fuse/relay box.n |
| 5. | Connect the No. 1 and No. 2 terminals of the compressor clutch relay 5P socket with a jumper wire.
Does the compressor clutch click? YES - Go to 6. NO - Go to 14. |
| 6. | Disconnect the jumper wire. |
| 7. | Turn the ignition switch ON (II). |
| 8. | Measure the voltage between the No. 5 terminal of the compressor clutch relay 5P socket and body ground.
Is there battery voltage? YES - Go to 9.n NO - Repair open in the wire between the No. 22 fuse in the under-dash fuse/relay box and the compressor clutch relay.n |
| 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. | Measure the voltage between the No. 12 terminal of ECM connector E (40P) and body ground with the ECM connectors connected.
Is there battery voltage? YES - Check for loose wires or poor connections at ECM connector E (40P). If the connections are good, substitute a known-good ECM, and recheck. If the symptom/indication goes away, replace the original ECM.n NO - Repair open in the wire between the compressor clutch relay and the ECM.n |
| 14. | Disconnect the jumper wire. |
| 15. | Disconnect the compressor clutch 1P connector. |
| 16. | Check for continuity between the No. 1 terminal of the compressor clutch relay 5P socket and the No. 1 terminal of the compressor clutch 1P connector.
Is there continuity? YES - Check the compressor clutch clearance, the thermal protector, and the compressor clutch field coil.n NO - Repair open in the wire between the compressor clutch relay and the compressor clutch.n |