Table of Contents
How do I fix code P0645?
How To Correct P0645 A/C Clutch Relay Control Circuit
- Replacing the A/C clutch relay.
- Replacing blown fuse or fuse-able link (if applicable)
- Cleaning corrosion from connectors.
- Evacuate and recharge A/C system.
- Repairing or replacing wiring.
- Repairing or replacing ground straps.
- Replacing a control module.
What is P0645?
Error Code P0645 is defined as A/C Clutch Relay Control Circuit, meaning there’s a problem in the A/C clutch relay control circuit, likely caused by a defective A/C compressor driver or control relay. This is a generic trouble code, meaning it applies to all vehicles equipped with the OBD-II system.
What module controls the compressor clutch relay?
Power-train Control Module
The Module and control will be your PCM (Power-train Control Module), It is another effective way to control the PCM with the module.
What does the A C clutch relay do?
The air conditioning clutch relay transfers power, like a switch, from the interior A/C controls of an automobile to the A/C compressor, engaging the compressor clutch. Checking an A/C clutch relay is a process of eliminating possible connection failures.
How do I fix code P0480?
How To Correct P0480 Cooling Fan Relay 1 Control Circuit
- Repair or replace the faulty cooling fan 1.
- Replace the frayed vehicle speed sensor.
- Replace the inoperative AC pressure switch.
- Repair the faulty electrical connections.
- Repair or replace the defective fan wiring harness.
- Replace the engine coolant temperature sensor.
How do I manually engage my AC compressor clutch?
At the compressor’s front side, unplug the single wire connector, take a jumper wire and attach it to the wire that you just disconnected from the compressor. Connect the other end of the jumper’s wire to the positive terminal of the car battery. This will enable the compressor to start manually.
How do I know if my AC compressor relay is bad?
Signs of a Bad or Failing AC Compressor Relay
- Inconsistent cooling. The AC compressor is powered by the relay.
- AC compressor is not turning on. One of the most obvious signs that the AC relay may have a problem is that the compressor is not coming on at all.
- No cold air.
How do I know if my AC clutch relay is bad?
What are the most common signs and symptoms of a bad relay?
Bad Main Relay Symptoms
- Unable to Start Your Vehicle. If you try to start your vehicle and it won’t start, there’s a chance that you have a bad main relay.
- Check Engine Light. If you can start your vehicle, you’ll notice a check engine light on the dashboard if you have a bad main relay.
- Your Vehicle Won’t Stay Running.
What are the symptoms of a bad AC relay?
Signs of a Bad or Failing AC Compressor Relay
- Inconsistent cooling. The AC compressor is powered by the relay.
- AC compressor is not turning on. One of the most obvious signs that the AC relay may have a problem is that the compressor is not coming on at all.
- No cold air.
What causes code P0480?
OBD Code P0480 – Cooling Fan Relay 1 Control Circuit Diagnostic Trouble Code P0480 is defined as Cooling Fan 1 Control Circuit Malfunction. It indicates that PCM has detected an incorrect amount of voltage (high or low) in the electric cooling fan control circuit.