Checking A/C Operation With No DTCS

Test 1 - 3:

Test 4 - 10:

Test 11:

SYMPTOM
CHECKING A/C OPERATION WITH NO DTCs

POSSIBLE CAUSES
- DTC and communication present
- A/C select circuit open
- A/C select in HVAC
- PCM
- A/C request circuit open
- Refrigeration system not properly charged
- High press cut-off switch
- A/C clutch coil
- (Z1) ground circuit open
- (C3) A/C clutch relay output circuit open
- (F31) fused B+ circuit open
- A/C clutch relay