Checking A/C System Operation With No DTCs

Test 1 - 3:

Test 4 - 8:

Test 9 - 13:

Test 14 - 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
- (C2) A/C clutch relay output circuit open
- A/C request circuit open
- (A17) fused B+ circuit open
- A/C clutch relay
- AZC module or A/C - heater control module
- body control module
- Check A/C switch signal circuit for an open
- A/C switch signal circuit open