Checking A/C System Operation With No DTCs

Test 1 - 3:

Test 4 - 9:

Test 10 - 14:

Test 15:

SYMPTOM
CHECKING A/C SYSTEM OPERATION WITH NO DTCs

POSSIBLE CAUSES
- Check for PCM DTCs
- Refrigeration system not properly charged
- High press cut-off switch
- Low pressure switch
- Powertrain control module
- A/C clutch coil
- A/C compressor clutch ground circuit open
- (C3) A/C clutch relay output circuit open
- A/C request circuit open
- (A17) Fused B+ circuit open
- A/C clutch relay
- A/C - heater control module
- Body control module
- A/C ON/OFF control circuit open
- A/C ON/OFF control circuit open