Compressor Clutch Circuit Troubleshooting
15-31flowchart1
(from 15-30 page)
2
Turn the ignition switch OFF and reconnect the 4-P connector to the compressor clutch relay.
3
Turn the ignition switch on and connect the jumper wire between the YEL terminal and body ground.
4
Does the compressor clutch engage?
NO
Replace the compressor clutch relay.
YES
5
Turn the ignition OFF and disconnect the PGM-FI-ECU connector and connect the PGM-FI-ECU test harness.
6
Turn the ignition switch ON and connect the jumper wire between B-3 terminal and body ground.
7
Does the compressor clutch engage?
NO
Repair open in YEL wire between the compressor clutch relay.
YES
8
Substitute a known-good ECU and recheck. If prescribed voltage is now available, replace the original ECU.