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INSPECTION PROCEDURE 8: Left or right side 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: Harness Set
  • MB992006: Extra Fine Probe
STEP 1. Verify the operation of each heated door mirror.
Which door mirror does not heat?
Door mirror (LH) : Go to Step 2.
Door mirror (RH) : Go to Step 8.
 
STEP 2. Check door mirror (LH) connector F-01 door mirror assembly for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Is door mirror (LH) connector F-01 door mirror assembly in good condition?
Go to Step 3.
Repair or replace the damaged component(s). Refer to GROUP 00E, 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).
cautionWhen 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 9 of the door mirror (LH) connector F-01.
  • The resistance should be 7.2 ± 1.4 Ω at 25°C (77°F).
Is the resistance normal?
Go to Step 4.
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 F-01 door mirror assembly and ground for open circuit. Measure the resistance at door mirror (LH) connector F-01 door mirror assembly.
(1) Disconnect door mirror (LH) connector F-01 door mirror assembly and check at the wiring harness side connector.
(2) Measure the resistance value between terminal 1 and ground.
  • The resistance should be 2Ω or less.
Is the measured resistance 2Ω or less?
Go to Step 6.
Go to Step 5.
 
STEP 5. Check the wiring harness between door mirror (LH) connector F-01 door mirror assembly (terminal 1) and ground.
noteAlso check intermediate connector C-224 for loose, corroded or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-224 is damaged, repair or replace the damaged component(s) as described in GROUP 00E, Harness Connector Inspection .
Is the wiring harness between door mirror (LH) connector F-01 door mirror assembly (terminal 1) and ground in good condition?
No action is necessary and testing is complete.
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. Check rear window defogger relay connector C-405 for loose, corroded or damaged terminal, or terminals pushed back in the connector.
Is rear window defogger relay connector C-405 in good condition?
Go to Step 7.
Repair or replace the damaged component(s). Refer to GROUP 00E, Harness Connector Inspection . And then check to see that the heater function of the door mirror (LH) operates normally.
 
STEP 7. Check the wiring harness between door mirror (LH) connector F-01 door mirror assembly (terminal 9) and rear window defogger relay connector C-405 (terminal 3).
noteAlso check intermediate connector C-225 for loose, corroded or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-225 is damaged, repair or replace the damaged component(s) as described in GROUP 00E, Harness Connector Inspection .
Is the wiring harness between door mirror (LH) connector F-01 door mirror assembly (terminal 9) and rear window defogger relay connector C-405 (terminal 3) in good condition?
No action is necessary and testing is complete.
Repair the wiring harness as necessary. And then check to see that the heater function of the door mirror (LH) operates normally.
 
STEP 8. Check the door mirror (RH) connector F-04 door mirror assembly for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Is the door mirror (RH) connector F-04 door mirror assembly in good condition?
Go to Step 9.
Repair or replace the damaged component(s). Refer to GROUP 00E, Harness Connector Inspection . And then check to see that the heater function of the door mirror (RH) operates normally.
 
STEP 9. Check the heater function of the door mirror (RH).
cautionWhen 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 9 of the door mirror (RH) connector F-04.
  • The resistance should be 7.2 ± 1.4 Ω at 25°C (77°F).
Is the resistance normal?
Go to Step 10.
Replace the door mirror (RH). And then check to see that the heater function of the door mirror (RH) operates normally.
 
STEP 10. Check the ground circuit between door mirror (RH) connector F-04 door mirror assembly and ground for open circuit. Measure the resistance at door mirror (RH) connector F-04 door mirror assembly.
(1) Disconnect door mirror (RH) connector F-04 door mirror assembly, and check at the wiring harness side connector.
(2) Measure the resistance value between terminal 1 and ground.
  • The resistance should be 2Ω or less.
Is the measured resistance 2Ω or less?
Go to Step 12.
Go to Step 11.
 
STEP 11. Check the wiring harness between door mirror (RH) connector F-04 door mirror assembly (terminal 1) and ground.
noteAlso check intermediate connector C-211 for loose, corroded or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-211 is damaged, repair or replace the damaged component(s) as described in GROUP 00E, Harness Connector Inspection .
Is the wiring harness between door mirror (RH) connector F-04 door mirror assembly (terminal 1) and ground in good condition?
No action is necessary and testing is complete.
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 12. Check rear window defogger relay connector C-405 for loose, corroded or damaged terminal, or terminals pushed back in the connector.
Is rear window defogger relay connector C-405 in good condition?
Go to Step 13.
Repair or replace the damaged component(s). Refer to GROUP 00E, Harness Connector Inspection . And then check to see that the heater function of the door mirror (RH) operates normally.
 
STEP 13. Check the wiring harness between door mirror (RH) connector F-04 door mirror assembly (terminal 9) and rear window defogger relay connector C-405 (terminal 3).
noteAlso check intermediate connector C-212 for loose, corroded or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-212 is damaged, repair or replace the damaged component(s) as described in GROUP 00E, Harness Connector Inspection .
Is the wiring harness between door mirror (RH) connector F-04 door mirror assembly (terminal 9) and rear window defogger relay connector C-405 (terminal 3) in good condition?
No action is necessary and testing is complete.
Repair the wiring harness as necessary. And then check to see that the heater function of the door mirror (RH) operates normally.