Operation CHARM
: Car repair manuals for everyone.
Hosted by
mcallihan.com
Home
>>
Chevy Truck
>>
1986
>>
G 20 Van V8-305 5.0L
>>
Repair and Diagnosis
>>
Powertrain Management
>>
Computers and Control Systems
>>
Testing and Inspection
>>
Scan Tool Testing and Procedures
>>
Positions
>>
A/C Request - A/C Clutch
A/C Request - A/C Clutch
The scan switch displays the on and off status of the ECM
A/C signal
line. On condition indicates ECM command to energize compressor clutch.