7B
Cool air does not come out (A/C system doesn’t operate)
For K9K Engine Diagnosis
Condition Possible Cause Action
Cool air does not come out (A/C system doesn’t operate)
No refrigerant
Perform recover, evacuation and charging.
Fuse blown
Check fuse in main and circuit fuse boxes, and check short circuit to ground.
A/C switch faulty
Check A/C switch.
Heater blower fan switch faulty
Check heater blower fan switch referring to Heater Blower Fan Switch Inspection .
A/C evaporator temperature sensor faulty
Check A/C evaporator temperature sensor.
Refrigerant pressure sensor faulty
Check refrigerant pressure sensor.
Wiring or grounding faulty
Repair as necessary.
ECT sensor faulty
ECM and its circuit faulty
Check ECM and its circuit.