INSPECTION PROCEDURE
8: Either of the door mirror heater elements does not work.
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COMMENTS ON TROUBLE SYMPTOM
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If either of the door mirror heater elements does not work, the power supply or earth
to the element, or the element itself may be defective.
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- Door mirror heater elements failed
- Wiring harness or connector failure
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STEP 1. Determine a trouble spot.
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Q.
Which of door mirror heater elements does not work?
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Driver’s door mirror : Go to Step 2.
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Passenger’s door mirror : Go to Step 9.
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STEP 2. Check of the heater element of the door mirror (RH)
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Check the heater element of the door mirror (RH). (Refer to Heater Element Check  .)
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Q.
Is the check result normal?
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 Go to Step 3.
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 Replace the mirror glass of the door mirror assembly (RH).
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STEP 3. Check the E-01 door mirror assembly (RH) connector
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Q.
Is the check result normal?
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Go to Step 4.
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Repair the defective connector.
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STEP 4. Measure the resistance at the E-01 door mirror assembly (RH)
connector.
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(1)Disconnect the connector, and measure at the wiring harness side.
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(2)Resistance between E-01 door mirror assembly (RH) connector terminal No. 1 and
body earth
OK: Continuity (2 Ω or less)
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Q.
Is the check result normal?
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Go to Step 6.
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Go to Step 5.
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STEP 5. Check the wiring harness between E-01 door mirror assembly
(RH) connector terminal No. 2 and body earth.
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| note |
Prior to the wiring harness inspection, check intermediate connector C-128 <LHD> or
C-113 <RHD>, and repair if necessary.
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- Check the earth wires for open circuit.
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Q.
Is the check result normal?
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Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection
Service Points - How to Cope with Intermittent Malfunction ).
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Repair the wiring harness.
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STEP 6. Measure the voltage at the E-01 door mirror assembly (RH)
connector.
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(1)Turn the ignition switch to the ON position.
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(2)Turn on the rear window defogger switch.
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(3)Disconnect the connector, and measure at the wiring harness side.
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(4)Measure the voltage between E-01 door mirror assembly (RH) connector terminal No.
1 and body earth.
OK: Battery voltage
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Q.
Is the check result normal?
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Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection
Service Points - How to Cope with Intermittent Malfunction ).
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Go to Step 7.
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STEP 7. Check the wiring harness between E-01 door mirror assembly
(RH) connector terminal No. 2 and C-306 rear window defogger relay connector terminal No. 3.
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| note |
Prior to the wiring harness inspection, check intermediate connector C-114 <LHD> or
C-129 <RHD>, and repair if necessary.
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- Check the power supply line for open circuit.
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Q.
Is the check result normal?
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Go to Step 8.
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Repair the wiring harness.
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STEP 8. Retest the system.
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Check that the heater element of the door mirror (RH) functions normally.
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Q.
Is the check result normal?
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Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection
Service Points - How to Cope with Intermittent Malfunction ).
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Replace the door mirror assembly (RH).
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STEP 9. Check of the heater element of the door mirror (LH)
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Check the heater element of the door mirror (LH). (Refer to Heater Element Check .)
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Q.
Is the check result normal?
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Go to Step 10.
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Replace the mirror glass of the door mirror assembly (LH).
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STEP 10. Check the E-14 door mirror assembly (LH) connector
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Q.
Is the check result normal?
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Go to Step 11.
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Repair the defective connector.
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STEP 11. Measure the resistance at the E-14 door mirror assembly (LH)
connector.
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(1)Disconnect the connector, and measure at the wiring harness side.
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(2)Measure the resistance between E-14 door mirror assembly (LH) connector terminal
No. 1 and body earth.
OK: Continuity(2 Ω or less)
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Q.
Is the check result normal?
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Go to Step 13.
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Go to Step 12.
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STEP 12. Check the wiring harness between E-14 door mirror assembly
(LH) connector terminal No. 2 and body earth.
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| note |
Prior to the wiring harness inspection, check intermediate connector C-128 <LHD> or
C-113 <RHD>, and repair if necessary.
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- Check the earth wires for open circuit.
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Q.
Is the check result normal?
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Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection
Service Points - How to Cope with Intermittent Malfunction ).
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Repair the wiring harness.
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STEP 13. Measure the voltage at the E-14 door mirror assembly (LH)
connector.
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(1)Turn the ignition switch to the ON position.
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(2)Turn on the rear window defogger switch.
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(3)Disconnect the connector, and measure at the wiring harness side.
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(4)Voltage between E-14 door mirror assembly (LH) connector terminal No. 1 and body
earth.
OK: Battery voltage
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Q.
Is the check result normal?
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Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection
Service Points - How to Cope with Intermittent Malfunction ).
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Go to Step 14.
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STEP 14. Check the wiring harness between E-14 door mirror assembly
(LH) connector terminal No. 2 and C-306 rear window defogger relay connector terminal No. 3.
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| note |
Prior to the wiring harness inspection, check intermediate connector C-129 <LHD> or
C-114 <RHD>, and repair if necessary.
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- Check the power supply line for open circuit.
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Q.
Is the check result normal?
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Go to Step 15.
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Repair the wiring harness.
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STEP 15. Retest the system.
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Check that the heater element works normally.
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Q.
Is the check result normal?
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Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection
Service Points - How to Cope with Intermittent Malfunction ).
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Replace the door mirror assembly (LH).
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