Inspection Procedure 2: Right or Left Heated Door Mirror does not Operate


caution Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.


COMMENTS ON TROUBLE SYMPTOM
If either of the heated door mirrors does not work, the door mirror assembly may be defective.

PROBABLE CAUSES

  • Malfunction of the door mirror assembly
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

STEP 1. Verify the operation of each heated door mirror.

Q. Which door mirror does not heat?
Door mirror (RH) : Go to Step 2.
Door mirror (LH) : Go to Step 9.

STEP 2. Connector check: D-12 door mirror assembly (RH) connector.

Q. Is the check result normal?

Go to Step 3.

Repair the defective connector.

STEP 3. Check the door mirror assembly (RH).
Check that the heater element of the door mirror assembly (RH) is in good condition (Refer to the heated door mirror check ).

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

STEP 4. Resistance measurement at the D-12 door mirror assembly (RH) connector.

(1)Disconnect the connector, and measure at the wiring harness side.

(2)Resistance between D-12 door mirror assembly connector terminal No.2 and body earth.
OK: Continuity exists (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 D-12 door mirror assembly (RH) connector terminal No.2 and body earth.



note Prior to the wiring harness inspection, check intermediate connector B-104 <LH drive vehicles> and B-120 <RH drive vehicles>, and repair if necessary.

  • Check the earth wires for open circuit.

Q. Is the check result normal?

The trouble can be an 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. Voltage measurement at the D-12 door mirror assembly (RH) connector.

(1)Turn the ignition switch to the ON position.
(2)Rear window defogger switch: ON
(3)Disconnect the connector, and measure at the wiring harness side.

(4)Voltage between D-12 door mirror assembly connector terminal No.1 and body earth.
OK: System voltage

Q. Is the check result normal?

The trouble can be an 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. Check the wiring harness between D-12 door mirror assembly (RH) connector terminal No.1 and B-231 junction block connector terminal No.4.




note Prior to the wiring harness inspection, check intermediate connector B-104 <LH drive vehicles> and B-120 <RH drive vehicles>, and repair if necessary.

  • Check the power supply line for open circuit.

Q. Is the check result normal?

Go to Step 8.

Repair the wiring harness.

STEP 8. Retest the system.
Check that the heater element of the door mirror (RH) functions normally.

Q. Is the check result normal?
The trouble can be an 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 9. Connector check: D-06 door mirror assembly (LH) connector.

Q. Is the check result normal?

Go to Step 10.

Repair the defective connector.

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

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

STEP 11. Resistance measurement at the D-06 door mirror assembly (LH) connector.

(1)Disconnect the connector, and measure at the wiring harness side.

(2)Resistance between D-06 door mirror assembly connector terminal No.2 and body earth.
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?

Go to Step 13.

Go to Step 12.

STEP 12. Check the wiring harness between D-06 door mirror assembly (LH) connector terminal No.2 and body earth.



note Prior to the wiring harness inspection, check intermediate connector B-119 <LH drive vehicles> and B-122 <RH drive vehicles>, and repair if necessary.

  • Check the earth wires for open circuit.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).

Repair the wiring harness.

STEP 13. Voltage measurement at the D-06 door mirror assembly (LH) connector.

(1)Turn the ignition switch to the ON position.
(2)Rear window defogger switch: ON
(3)Disconnect the connector, and measure at the wiring harness side.

(4)Voltage between D-06 door mirror assembly connector terminal No.1 and body earth
OK: System voltage

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00, How to use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).

Go to Step 14.

STEP 14. Check the wiring harness between D-06 door mirror assembly (LH) connector terminal No.1 and B-231 junction block connector terminal No.4.




note Prior to the wiring harness inspection, check intermediate connector B-119 <LH drive vehicles> and B-122 <RH drive vehicles>, and repair if necessary.

  • Check the power supply line for open circuit.

Q. Is the check result normal?

Go to Step 15.

Repair the wiring harness.

STEP 15. Retest the system.
Check that the heater element works normally.

Q. Is the check result normal?
The trouble can be an 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).