Inspection Procedure
1: The Automatic Anti-Dazzling Mirror does not Work Normally.
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COMMENTS ON TROUBLE SYMPTOM
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When the ignition switch is turned to the ON position, the dimming function activates
automatically. If the dimming function does not work normally, the inside rear view mirror, ignition
switch circuit system, input circuit system of the inhibitor switch may be defective.
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- Damaged harness wires or connectors
- Malfunction of the inhibitor switch
- Malfunction of the inside rear view mirror
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STEP 1. Voltage measurement at inside rear view mirror
connector (IG2 relay line).
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(1)Disconnect the connector, and measure at the wiring harness-side connector.
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(2)Turn the ignition switch to the "ACC" position.
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(3)Voltage between inside rear view mirror connector (IG2 relay line) and the body
earth
OK: System voltage
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Q.
Is the check result normal?
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 Go to Step 2.
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 Repair the connector(s) or wiring harness.
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STEP 2. Resistance measurement at inside rear view mirror connector
(earth line).
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(1)Disconnect inside rear view mirror connector, and measure the resistance available
at the wiring harness side.
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(2)Continuity between inside rear view mirror connector (earth line) and body earth
OK: Continuity exists (2 Ω or less)
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Q.
Is the check result normal?
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Go to Step 3.
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Repair the connector(s) or wiring harness.
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STEP 3. Voltage measurement at inside rear view mirror connector (IG1
relay line).
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(1)Disconnect the connector, and measure at the wiring harness-side connector.
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(2)Turn the ignition switch to the "ON" position.
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(3)Move the selector lever to the "R" (Reverse) position.
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(4)Voltage between inside rear view mirror connector (IG1 relay line) and the body
earth
OK: System voltage
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Q.
Is the check result normal?
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Go to Step 4.
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Repair the connector(s) or wiring harness.
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STEP 4. Check the inhibitor switch.
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Check that the inhibitor switch (Refer to GROUP 23A - On-vehicle Service - Inhibitor
Switch Continuity Check  )
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Q.
Is the check result normal?
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Go to Step 5.
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Replace the inhibitor switch.
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STEP 5. Check the inside rear view mirror.
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Check that the harness connector is correctly mounted to the inside rear view mirror (Refer
to ).
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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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Replace the inside rear view mirror.
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