On-Vehicle Inspection
WARNING: This page is about a different car, the 2002 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.
- Set up manifold gauge set. See SET UP .
- Start engine.
- Inspect compressor for metallic sound.
- Check if there is a metallic sound from the compressor when the A/C switch is on.
- If metallic sound is not heard, replace the compressor assembly.
- Inspect refrigerant pressure. See step 2 under ON-VEHICLE INSPECTION.
- Stop engine.
- Inspect visually for leakage of refrigerant from safety seal.
- Using a gas leak detector, check for leakage of refrigerant. If there is any leakage, replace the compressor assembly.
- Take down manifold gauge set. See TAKE DOWN .
- Check for leakage of grease from clutch bearing.
- Check for signs of oil on pressure plate.
- If necessary, repair or replace.
- Inspect magnetic clutch bearing for noise.
- Start engine.
- Check for abnormal noise from near the compressor when the A/C switch is OFF.
If abnormal noise is being emitted, replace the magnetic clutch.
- 5VZ-FE engine: Inspect magnetic clutch operation.
- Disconnect the connector.
- Connect the positive (+) lead from the battery to terminal on the magnetic clutch connector and the negative (-) lead to the body ground.
- Check that the magnetic clutch is energized.
If operation is not as specified, replace the magnetic clutch.
- 2UZ-FE engine: Inspect magnetic clutch operation.
- Disconnect the connector.
- Connect the positive (+) lead from the battery to terminal 3 and the negative (-) lead to the body ground.
- Check that the magnetic clutch is energized.
If operation is not as specified, replace the magnetic clutch.
- 2UZ-FE engine: Inspect compressor lock sensor resistance.
- Disconnect the connector.
- Measure resistance between terminals 1 and 2.
Standard resistance: 65-125 Ω at 20° C (68° F)
If resistance is not as specified, replace the compressor.