INSPECTION
PROCEDURE 4: The A/C compressor and clutch assembly does not work
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COMMENTS ON TROUBLE SYMPTOM
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If the power is not supplied to the A/C compressor and clutch assembly, the A/C
compressor and clutch assembly circuits may be defective.
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- The refrigerant quantity is inadequate.
- Malfunction of A/C compressor and clutch assembly
- Malfunction of A/C compressor relay
- Damaged harness wires and connectors
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STEP 1. Check the refrigerant level.
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Refer to  .
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Q.
Is the check result normal?
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 Go to Step 2.
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 Correct the refrigerant amount.
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STEP 2. Voltage measurement at A/C compressor and clutch
assembly and connector.
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(1)Remove the relay and measure at the relay box side.
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(2)Turn the ignition switch to the "ON" position.
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(3)Voltage between terminal 1 and body earth.
OK: System voltage
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Q.
Is the check result normal?
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Go to Step 5.
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Go to Step 3.
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STEP 3. Check the A/C compressor.
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Refer to .
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Q.
Is the A/C compressor in good condition?
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Go to Step 4.
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Replace the A/C compressor.
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STEP 4. Trouble symptom recheck
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Q.
Is the check result normal?
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This diagnosis is complete.
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Replace the engine-ECU.
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STEP 5. Check the A/C compressor relay.
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Refer to .
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Q.
Is the A/C compressor relay in good condition?
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Go to Step 6.
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Replace the A/C compressor relay.
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STEP 6. Voltage measurement at A/C compressor relay connector.
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(1)Remove the relay and measure at the relay box side.
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(2)Turn the ignition switch to the "ON" position.
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(3)Voltage between terminal 1,4 and body earth.
OK: System voltage
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Q.
Is the check result normal?
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Go to Step 8.
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Go to Step 7.
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STEP 7. Check open circuit in A/C compressor line between
ignition switch <Vehicles without one touch start system> or IG2 relay <Vehicles
with one touch start system>, fusible link (6), and A/C compressor relay connector.
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Before the wiring harness check, check the junction block connector and joint connector.
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Q.
Is the check result normal?
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The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope
with Intermittent Malfunction ).
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Repair the connector(s) or wiring harness.
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STEP 8. Check open circuit in AC/R and A/C compressor and
clutch assembly line between A/C compressor relay, A/C compressor and clutch
assembly and engine-ECU connector.
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Before the wiring harness check, check the junction block connector and joint connector.
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Q.
Is the check result normal?
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The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope
with Intermittent Malfunction ).
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Repair the connector(s) or wiring harness.
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