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When the rear outlet switching cannot be made, the circuit between the rear mode selection damper control motor and A/C-ECU may have a failure.
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- Malfunction of the rear mode selection damper control motor.
- Malfunction of the automatic A/C control panel (A/C-ECU)
- Damaged the wiring harness or connectors
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Q.
Is the check result normal?
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(1)Remove the relay, and measure at the junction block side.
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(2)Turn the ignition switch to the ON position.
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(3)Voltage between terminal 2 and body earth. OK: System voltage
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Q.
Is the check result normal?
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- Check the rear mode selection damper control motor 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)Disconnect the connector, and measure at the wiring harness side.
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(2)Continuity between terminal 1 and body earth OK: Continuity (Less than 2 ohms)
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Q.
Is the check result normal?
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- Check the mode selection damper control motor earth 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.
Is the check result normal?
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- Check the 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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Check that the rear mode selection damper control motor operates normally.
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Q.
Is the check result normal?
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This diagnosis is complete.
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