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If this code is set, there is an open circuit (B1084) or short circuit (B1085) in the wiring harness between the rear window defogger relay and the A/C-ECU.
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- Malfunction of the rear window defogger relay
- Damaged wiring harness or connectors
- Malfunction of the semi automatic air conditioner control panel (A/C-ECU)
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Q.
Is the check result normal?
 Go to Step 2.
 Repair the connector.
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Refer to GROUP 54A, Rear window defogger  .
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Q.
Is the rear window defogger relay continuity in good condition?
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Replace the rear window defogger relay.
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(1)Remove the relay, and measure at the junction block side.
(2)Turn the ignition switch to the ON position.
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(3)Voltage between terminal 1 and body earth.
OK: System voltage
Q.
Is the check result normal?
Go to Step 5.
Go to Step 4.
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Prior to the wiring harness inspection, check junction block connector B-230, and repair if necessary.
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- Check the blower relay power supply line for open circuit.
Q.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).
Repair the wiring harness.
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Q.
Is the check result normal?
Go to Step 6.
Repair the connector.
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Prior to the wiring harness inspection, check junction block connector B-231, and repair if necessary.
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- Check the rear window defogger earth line for open and short circuit.
Q.
Is the check result normal?
Go to Step 7.
Repair the wiring harness.
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Q.
Is the diagnosis code set?
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Replace the semi automatic air conditioner control panel (A/C-ECU).
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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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