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If the A/C compressor does not operate, the A/C compressor circuit system
may be defective.
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- Malfunction of A/C compressor
- Malfunction of A/C compressor relay
- Malfunction of A/C pressure sensor
- Damaged harness wires and connectors
- Malfunction of engine-A/T-ECU <A/T> or engine-ECU <M/T>
- Malfunction of the A/C-ECU
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Q.
Is the check result normal?
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(1)Disconnect the connector, and measure at the wiring harness side.
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(2)Turn the ignition switch to the "ON" position.
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(3)Disconnect engine-A/T-ECU connector D-212 <A/T> or engine-ECU connector
D-243 <M/T> and earth terminal 8.
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(4)Voltage between terminal 1 and body earth. OK: System voltage
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Q.
Is the check result normal?
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Q.
Is the check result normal?
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Q.
Is the A/C compressor relay in good condition?
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Replace the A/C compressor relay.
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(1)Remove the relay, and measure at the relay block 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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- Check the A/C compressor relay power supply line for open circuit.
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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 wiring harness.
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(1)Remove the relay, and measure at the relay block side.
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(2)Voltage between terminal 5 and body earth. OK: System voltage
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Q.
Is the check result normal?
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- Check the A/C compressor relay power supply line for open circuit.
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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 wiring harness.
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- Check the A/C compressor relay power supply line for open circuit.
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Q.
Is the check result normal?
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Repair the wiring harness.
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- Check the A/C compressor power supply line for open circuit.
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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 wiring harness.
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Q.
Can the sound of the magnetic clutch (click) be heard?
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Replace the compressor magnet clutch.
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Q.
Is the check result normal?
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- Check the engine-A/T-ECU <A/T> or engine-ECU <M/T> input
line for open circuit.
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Q.
Is the check result normal?
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Repair the wiring harness.
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- Check the engine-A/C-ECU input line for open circuit.
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Q.
Is the check result normal?
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Repair the wiring harness.
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Remove the refrigerant and fill it to the specified amount. Then check if the A/C
operates normally. Refer to .
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Q.
Is the check result normal?
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This diagnosis is complete.
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Check that the compressor works normally.
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Q.
Is the check result normal?
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This diagnosis is complete.
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Check that the compressor works normally.
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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-A/T-ECU.
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