Inspection Procedure 2
INSPECTION PROCEDURE 2: The Right or Left Heated Door Mirror does not Operate
CIRCUIT OPERATION
If either of the heated door mirror do not operate normally, it may be due to malfunctions in the heated door mirror circuit or door mirror.
TROUBLESHOOTING HINTS
- Malfunction of the heated door mirror circuit
- Malfunction of the door mirror
- The wiring harness or connectors may have loose, corroded or damaged terminals, or terminals pushed back in the connector.
DIAGNOSIS
Required Special Tools:
- MB991223: Test Harness Set
STEP 1. Verify the operation of each heated door mirror.
Q. Which door mirror does not heat?
Door mirror (LH) : Go to Step 2.
Door mirror (RH) : Go to Step 9.
STEP 2. Check door mirror (LH) connector E-01 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q. Is door mirror (LH) connector E-01 in good condition?
YES Go to Step 3.
NO Repair or replace the damaged component(s). Harness Connector Inspection. And then check to see that the heater function of the door mirror (LH) operates normally.
STEP 3. Check the heater of the door mirror (LH).
CAUTION:
When relocating the car between locations of extremely different temperatures
(warm and cold), leave the car in a location for a while to adapt to the temperature prior to checking it.
Check to see that the resistance between terminal 1 and 5 of the door mirror (LH) connector E-01.
- The resistance should be 8.4 ± 1.2 ohms at 25°C (77°F).
Q. Is the resistance normal?
YES Go to Step 4.
NO Replace the door mirror (LH). And then check to see that the heater function of the door mirror (LH) is operating normally.
STEP 4. Check the ground circuit between door mirror (LH) connector E-01 and ground for open circuit. Measure the resistance at door mirror (LH) connector E-01.
(1)Disconnect door mirror (LH) connector E-01 and check at the wiring harness side connector.
(2)Measure the resistance value between terminal 1 and ground.
- The resistance should be 2 ohms or less.
Q. Is the measured resistance 2 ohms or less?
YES Go to Step 6.
NO Go to Step 5.
STEP 5. Check the wiring harness between door mirror (LH) connector E-01 (terminal 1) and ground.
NOTE:
Also check intermediate connector C-125 for loose, corroded or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-125 is damaged, repair or replace the damaged component(s) as described in Harness Connector Inspection Harness Connector Inspection.
Q. Is the wiring harness between door mirror (LH) connector E-01 (terminal 1) and ground in good condition?
YES No action is necessary and testing is complete.
NO The wiring harness may be damaged. Repair the wiring harness as necessary. And then check to see that the heater function of the door mirror (LH) operates normally.
STEP 6. Measure the voltage at door mirror assembly (LH) connector E-01
(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. 5 and body ground.
OK: Battery positive voltage
(5)
Q. Is the measured voltage approximately 12 V (battery positive voltage)?
YES Intermittent malfunction How to Cope With Intermittent Malfunctions).
NO Go to Step 7.
STEP 7. Check rear window defogger relay connector C-306 for loose, corroded or damaged terminal, or terminals pushed back in the connector.
Q. Is rear window defogger relay connector C-306 in good condition?
YES Go to Step 8.
NO Repair or replace the damaged component(s). Harness Connector Inspection. And then check to see that the heater function of the door mirror (LH) operates normally.
STEP 8. Check the wiring harness between door mirror (LH) connector E-01 (terminal 5) and rear window defogger relay connector C-306 (terminal 3).
NOTE:
Also check intermediate connector C-126 for loose, corroded or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-126 is damaged, repair or replace the damaged component(s) as described in Harness Connector Inspection Harness Connector Inspection.
Q. Is the wiring harness between door mirror (LH) connector E-01 (terminal 5) and rear window defogger relay connector C-306 (terminal 3) in good condition?
YES No action is necessary and testing is complete.
NO Repair the wiring harness as necessary. And then check to see that the heater function of the door mirror (LH) operates normally.
STEP 9. Check the door mirror (RH) connector E-03 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q. Is the door mirror (RH) connector E-03 in good condition?
YES Go to Step 10.
NO Repair or replace the damaged component(s). Harness Connector Inspection. And then check to see that the heater function of the door mirror (RH) operates normally.
STEP 10. Check the heater function of the door mirror (RH).
CAUTION:
When relocating the car between locations of extremely different temperatures
(warm and cold), leave the car in a location for a while to adapt to the temperature prior to checking it.
Check to see that the resistance between terminal 1 and 5 of the door mirror (RH) connector E-03.
- The resistance should be 8.4 ± 1.2 ohms at 25°C (77°F).
Q. Is the resistance normal?
YES Go to Step 11.
NO Replace the door mirror (RH). And then check to see that the heater function of the door mirror (RH) operates normally.
STEP 11. Check the ground circuit between door mirror (RH) connector E-03 and ground for open circuit. Measure the resistance at door mirror (RH) connector E-03.
(1)Disconnect door mirror (RH) connector E-03, and check at the wiring harness side connector.
(2)Measure the resistance value between terminal 1 and ground.
- The resistance should be 2 ohms or less.
Q. Is the measured resistance 2 ohms or less?
YES Go to Step 13.
NO Go to Step 12.
STEP 12. Check the wiring harness between door mirror (RH) connector E-03 (terminal 1) and ground.
NOTE:
Also check intermediate connector C-114 for loose, corroded or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-114 is damaged, repair or replace the damaged component(s) as described in Harness Connector Inspection Harness Connector Inspection.
Q. Is the wiring harness between door mirror (RH) connector E-03 (terminal 1) and ground in good condition?
YES No action is necessary and testing is complete.
NO The wiring harness may be damaged. Repair the wiring harness as necessary. And then check to see that the heater function of the door mirror (RH) operates normally.
STEP 13. Measure the voltage at door mirror assembly (RH) connector E-03
(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-03 door mirror assembly (RH) connector terminal No. 5 and body ground.
OK: Battery positive voltage
(5)
Q. Is the measured voltage approximately 12 V (battery positive voltage)?
YES Intermittent malfunction How to Cope With Intermittent Malfunctions).
NO Go to Step 14.
STEP 14. Check rear window defogger relay connector C-306 for loose, corroded or damaged terminal, or terminals pushed back in the connector.
Q. Is rear window defogger relay connector C-306 in good condition?
YES Go to Step 15.
NO Repair or replace the damaged component(s). Harness Connector Inspection. And then check to see that the heater function of the door mirror (RH) operates normally.
STEP 15. Check the wiring harness between door mirror (RH) connector E-03 (terminal 5) and rear window defogger relay connector C-306 (terminal 3).
NOTE:
Also check intermediate connector C-115 for loose, corroded or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-115 is damaged, repair or replace the damaged component(s) as described in Harness Connector Inspection Harness Connector Inspection.
Q. Is the wiring harness between door mirror (RH) connector E-03 (terminal 5) and rear window defogger relay connector C-306 (terminal 3) in good condition?
YES No action is necessary and testing is complete.
NO Repair the wiring harness as necessary. And then check to see that the heater function of the door mirror (RH) operates normally.