Inspection Procedure 8: Either of the door mirror heater elements does not work.




























COMMENTS ON TROUBLE SYMPTOM
If either of the door mirror heater element does not work, the power supply or earth to the heater element, or heater element itself may be defective.

PROBABLE CAUSES

  • Door mirror heater elements failed
  • Wiring harness or connector failure

DIAGNOSTIC PROCEDURE

STEP 1. Determine a trouble spot.

Q. Which of door mirror heater elements does not work?
Driver’s door mirror : Go to Step 10.
Passenger’s door mirror : Go to Step 2.

STEP 2. Check the E-03 door mirror assembly (RH) connector

Q. Is the check result normal?
Go to Step 3.
Repair the defective connector.

STEP 3. Check of the heater element of the door mirror (RH)
Check the heater element of the door mirror (RH). (Refer to Heater Element Check .)

Q. Is the check result normal?
Go to Step 4.
Replace the mirror glass of the door mirror assembly (RH).

STEP 4. Measure the resistance at the E-03 door mirror assembly (RH) connector.
(1)Disconnect the connector, and measure at the wiring harness side.
(2)Resistance between E-03 door mirror assembly (RH) connector terminal No. 5 and body earth
OK: Continuity (2 Ω or less)

Q. Is the check result normal?
Go to Step 6.
Go to Step 5.

STEP 5. Check the wiring harness between E-03 door mirror assembly (RH) connector terminal No. 5 and body earth.
note Prior to the wiring harness inspection, check intermediate connector C-111, and repair if necessary.

  • Check the earth wires for open circuit.

Q. Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
Repair the wiring harness.

STEP 6. Measure the voltage at the E-03 door mirror assembly (RH) connector.
(1)Turn the ignition switch to the ON position.
(2)Turn on the rear window defogger switch.
(3)Disconnect the connector, and measure at the wiring harness side.
(4)Measure the voltage between E-03 door mirror assembly (RH) connector terminal No. 1 and body earth.
OK: Battery voltage

Q. Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
Go to Step 7.

STEP 7. Connector check: C-02 joint connector (3) connector

Q. Is the check result normal?
Go to Step 8.
Repair the damaged connector.

STEP 8. Check the wiring harness between E-03 door mirror assembly (RH) connector terminal No.1 and C-02 joint connector (3) connector terminal No. 22.
note Prior to the wiring harness inspection, check intermediate connector C-112, and repair if necessary.

  • Check the power supply line for open circuit.

Q. Is the check result normal?
Go to Step 9.
Repair the wiring harness.

STEP 9. Retest the system.
Check that the heater element of the door mirror (RH) functions normally.

Q. Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
Replace the door mirror assembly (RH).

STEP 10. Check of the heater element of the door mirror (LH)
Check the heater element of the door mirror (LH). (Refer to Heater Element Check .)

Q. Is the check result normal?
Go to Step 11.
Replace the mirror glass of the door mirror assembly (LH).

STEP 11. Check the E-01 door mirror assembly (LH) connector

Q. Is the check result normal?
Go to Step 12.
Repair the defective connector.

STEP 12. Measure the resistance at the E-01 door mirror assembly (LH) connector.
(1)Disconnect the connector, and measure at the wiring harness side.
(2)Measure the resistance between E-01 door mirror assembly (LH) connector terminal No. 5 and body earth.
OK: Continuity(2 Ω or less)

Q. Is the check result normal?
Go to Step 14.
Go to Step 13.

STEP 13. Check the wiring harness between E-01 door mirror assembly (LH) connector terminal No. 5 and body earth.
note Prior to the wiring harness inspection, check intermediate connector C-125 , and repair if necessary.

  • Check the earth wires for open circuit.

Q. Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
Repair the wiring harness.

STEP 14. Measure the voltage at the E-01 door mirror assembly (LH) connector.
(1)Turn the ignition switch to the ON position.
(2)Turn on the rear window defogger switch.
(3)Disconnect the connector, and measure at the wiring harness side.
(4)Voltage between E-01 door mirror assembly (LH) connector terminal No. 1 and body earth.
OK: Battery voltage

Q. Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
Go to Step 15.

STEP 15. Connector check: C-02 joint connector (3) connector

Q. Is the check result normal?
Go to Step 16.
Repair the damaged connector.

STEP 16. Check the wiring harness between E-01 door mirror assembly (LH) connector terminal No.1 and C-02 joint connector (3) connector terminal No. 23.
note Prior to the wiring harness inspection, check intermediate connector C-126, and repair if necessary.

  • Check the power supply line for open circuit.

Q. Is the check result normal?
Go to Step 17.
Repair the wiring harness.

STEP 17. Retest the system.
Check that the heater element works normally.

Q. Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
Replace the door mirror assembly (LH).