DESCRIPTION
| WARNING | To avoid injury from accidental air bag deployment, read and carefully follow all SERVICE PRECAUTIONS and DISABLING & ACTIVATING AIR BAG SYSTEM procedures in AIR BAG SYSTEM SAFETY article in GENERAL SERVICING. |
NO DEFROST OPERATION
Check for defective blower motor(s). Look for closed or seized air temperature blend vents or flaps. Check for faulty A/CCM. Look for incorrect communication between control panel and A/CCM due to open or shorted wires or poor connector connections in wiring harness. Possible defective water pump or valve. Also, consider weather conditions, ambient air temperature, an intermittent or continuous fault, airflow fault, temperature control fault, distribution fault and air inlet problem.
Fault Description
Vehicle speed input is more than 50 MPH and engine speed is zero. Repair or replace as necessary. Motor failure will not set a panel fault code.
In-vehicle air temperature sensor circuit failure.
In-vehicle air temperature sensor circuit failure.
Ambient air temperature sensor circuit failure.
Ambient air temperature sensor circuit failure.
Solar sensor circuit failure.
Solar sensor circuit failure.
Defrost vent servo motor has not reached position within 30 seconds.
Center vent servo motor has not reached position within 30 seconds.
Foot vent servo motor has not reached position within 30 seconds.
Cool air by-pass servo motor has not reached position within 30 seconds.
Left fresh/recirculated air servo motor has not reached position within 30 seconds.
Right fresh/recirculated air servo motor has not reached position within 30 seconds.
Defrost feedback potentiometer sensor circuit failure.
Defrost feedback potentiometer sensor circuit failure.
Center vent feedback potentiometer sensor circuit failure.
Center vent feedback potentiometer sensor circuit failure.
Foot vent feedback potentiometer sensor circuit failure.
Foot vent feedback potentiometer sensor circuit failure.
Cool air by-pass feedback potentiometer sensor circuit failure.
Cool air by-pass feedback potentiometer sensor circuit failure.
Left fresh/recirculated air feedback potentiometer sensor circuit failure.
Left fresh/recirculated air feedback potentiometer sensor circuit failure.
Right fresh/recirculated air feedback potentiometer sensor circuit failure.
Right fresh/recirculated air feedback potentiometer sensor circuit failure.
Battery voltage supply circuit failure between A/C isolate relay and A/CCM.
Battery voltage supply circuit failure between A/C isolate relay and A/CCM.
Sensor 5-volt reference voltage supply circuit failure.
Sensor 5-volt reference voltage supply circuit failure.
Sensor 5-volt reference voltage supply circuit failure.
Battery voltage supply circuit failure.
Face vent differential temperature control potentiometer circuit failure.
Face vent differential temperature control potentiometer circuit failure.
In-vehicle temperature sensor aspirator motor circuit failure.
In-vehicle temperature sensor aspirator motor circuit failure.
Ignition switched ground signal circuit failure.
Refrigerant pressure switch circuit failure.
Refrigerant pressure switch circuit failure.
Compressor lock sensor circuit failure.
Sensor signal ground circuit failure.
Evaporator temperature sensor signal circuit failure.
Evaporator temperature sensor signal circuit failure.
Coolant temperature sensor signal circuit failure between instrument cluster and A/CCM.
Coolant temperature sensor signal circuit failure between instrument cluster and A/CCM.
Heater matrix temperature sensor signal circuit failure.
Heater matrix temperature sensor signal circuit failure.
Heater pump motor ground circuit failure.
Compressor clutch circuit failure.
Control panel serial communication circuit failure.
Control panel serial communication circuit failure.