Component Inspection

Component Inspection

1. Check A/C relay
(1) IG "OFF".
(2) Disconnect A/C relay.
(3) Measure the resistance between terminal 30 and 87 of A/C relay.
(4) Measure the resistance between terminal 85 and 86 of A/C relay.









(5) Is the measured resistance within specification?
YES
- Substitute with a known-good ECM and check for proper operation. If the problem is corrected, replace ECM and go to "Verification of Vehicle Repair" procedure.
NO
- Substitute with a known-good A/C relay and check for proper operation. If the problem is corrected, replace A/C relay and go to "Verification of Vehicle Repair" procedure.

CAUTION:
There is a memory reset function on scantool that can erase optional parts automatically detected and memorized by ECM. After testing ECM on the vehicle, use this function to reuse the ECM on the others