Component Inspection

P0645 A/C Clutch Relay Control Circuit

Inspection/Repair - Component Inspection

Component Inspection

1. A/C relay check
(1) Key "OFF".
(2) Disconnect A/C relay.
(3) Measure the resistance between terminal 1 and 2 of A/C relay component side.
(4) Measure the resistance between terminal 3 and 5 of A/C relay component side.
A. Specification :









(5) Is the measured resistance within specifications?
YES
1) 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.

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

NO
1) 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.