100S Quattro Wagon (Canada) V6-2.8L (AAH) (1992)
Technical Bulletins:
Diagnosis procedure:
1. -
Print DTC (additionally, read control head diagnostic display, channel 1, on cars with automatic climate control), then erase DTC.
2. -
Check control head coding on cars with automatic climate control. Check compressor clutch control module coding level on cars with manual
A/C.
3. -
Reset basic settings (Function 04) on cars with automatic climate control.
4. -
Run A/C system as necessary to duplicate complaint.
5. -
Perform step 1 again. Check compressor shut-off conditions if the customer complaint is compressor clutch won't engage.
6. -
Perform repairs as indicated by the above steps.
A/C conditions that have been reported to the helpline:
1. -
Insufficient Cooling Performance (output air greater than 50°F from center vent).
A. -
Low refrigerant charge (with no obvious leaks) or overcharge. [All 90/100/S4]
B. -
Basic settings not performed at PDI or after repairs. [90, 100, S4 w/automatic climate control]
2. -
A/C Compressor Clutch will not engage or shuts-off.
A. -
After sitting in the sun (warm vehicle interior). [All 90]
-
May have Diagnostic Trouble Code 01270, check for open connection or wire pushout in the green connector at auxiliary connector
station 2a. Refer to the dealer broadcast of 7-9-93.
B. -
Incorrect engine overheat indication from 4 terminal multi-function temperature sensor in engine compartment (F76). [All 90, 100, S4]
-
All other functions of the switch may operate normally (temperature gauge, etc.).
-
Disconnect the switch, if it is the cause of the shut-off, the compressor should engage.
C. -
Compressor clutch Control Module fails (J153). [90, 100w/manual A/C]
-
Replacement Control Modules must have a software designation of at least D04.