- Air inlet door is inoperative
|
- Circuitry open/shorted
- HVAC module - electronic automatic temperature control (EATC)
- HVAC module - electronic manual temperature control (EMTC)
- Air inlet door actuator/linkage
|
|
- The steering wheel control switch is inoperative/does not operate correctly
|
- Circuitry open/shorted
- Steering wheel control switch
- HVAC module - EATC
|
|
- No communication with the HVAC module - electronic automatic temperature control (EATC)
|
- Fuse(s)
- Circuitry open/shorted
- HVAC module - EATC communication network
|
|
- The EATC system is inoperative, intermittent or incorrect operation
|
- Fuse(s)
- Circuitry open/shorted
- Input sensor(s)/erratic input signals
- HVAC module - EATC
- Automatic temperature control aspirator hose and elbow
|
|
- Incorrect/erratic direction of airflow from outlet(s)
|
- Circuitry open/shorted
- Mode door actuator
- Mode door binding or stuck
- HVAC module - EMTC
- HVAC module - EATC
- Door actuator arm not connected to the door crank
|
|
- Insufficient, erratic or no heat
|
- Low engine coolant level
- Engine overheating
- Plugged or partially plugged heater core
- Temperature blend door is binding or stuck
- Temperature blend door actuator
- Heater hose is kinked or binding
|
|
- The air conditioning (A/C) is inoperative/does not operate correctly
|
- Fuse(s)
- Circuitry open/shorted
- A/C system discharged/low charge
- A/C pressure cutoff switch
- PCM
- HVAC module - EATC
- HVAC module - EMTC
- A/C cycling switch
- A/C compressor clutch air gap
- A/C clutch relay
|
|
- The air conditioning (A/C) is always on
|
- Circuitry shorted
- HVAC module - EMTC
- HVAC module - EATC
- PCM
- A/C compressor clutch air gap
- A/C clutch relay
|
|
- The temperature control is inoperative/does not operate correctly - HVAC module - EMTC
|
- Circuitry open/shorted
- HVAC module - EMTC
- Temperature blend door
- Temperature blend door actuator
|
|
- The blower motor is inoperative - HVAC module - EMTC
|
- Fuse(s)
- Circuitry open/shorted
- A/C blower motor switch
- Blower motor relay
- A/C blower motor
|
|
- The blower motor does not operate correctly - HVAC module - EMTC
|
- Circuitry shorted
- A/C blower motor resistor
- A/C blower motor switch
|
|
- The blower motor is inoperative - HVAC module - EATC
|
- Fuse(s)
- Circuitry open/shorted
- Blower motor relay
- A/C blower motor
- A/C blower motor speed control
|
|
- The blower motor does not operate correctly - HVAC module - EATC
|
- Circuitry open/shorted
- A/C blower motor speed control
- HVAC module - EATC
|
|
- Insufficient air conditioning (A/C) cooling
|
- Low refrigerant level
- Temperature blend door actuator
|
|
- The temperature set point does not repeat after turning the ignition switch OFF
|
- Fuse
- Circuitry open/shorted
- HVAC module - EATC
|
- VERIFY the central junction box (CJB) fuse 5 (7.5A) is OK. If OK, CHECK circuit 729 (RD/WH) for a short or open and REPAIR as necessary. If OK, INSTALL a new HVAC module - EATC.
|
- The temperature display will not switch between Celsius and Fahrenheit
|
- HVAC module - EATC
- IC module
|
- If the instrument cluster does not switch between English and Metric, REFER to INSTRUMENT CLUSTER
article.
- If only the HVAC module - EATC does not switch between English and Metric, INSTALL a new HVAC module - EATC. REFER to CLIMATE CONTROL
article.
|
- Inaccurate external temperature display
|
- Instrument cluster (IC)
- HVAC module - EATC
|
|
- A/C pressure relief valve discharging
|
- High system pressure
- A/C pressure relief valve
|
- CHECK the high side system pressure. If the pressure is below the A/C pressure relief valve open pressure, INSTALL a new A/C pressure relief valve. If the system pressure is above the A/C pressure relief valve open pressure, REPAIR the system for a restriction
|