Symptom Related Diagnostic Procedures
TROUBLE SYMPTOM CHARTTrouble Symptom Chart:
SYMPTOM PROCEDURES [Vehicles for CANADA]
INSPECTION PROCEDURE 1: All Heated Door Mirrors do not Operate
Heated Door Mirror Circuit:
CIRCUIT OPERATION
If the heater function (heated door mirror) of the heater function does not operate normally it may be due to a malfunction in the defogger relay system.
TROUBLESHOOTING HINTS
- Malfunction of the defogger relay system.
- 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.Check the defogger.
1. Ignition switch: ON
2. Defogger switch: ON
Q: Does the defogger work normally?
YES : Go to Step 2.
NO : Malfunction of the defogger. Carry out the troubleshooting (Refer to Heater and A/C and Ventilation).
STEP 2.Check junction block connector C-215 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Is junction block connector C-215 in good condition?
YES : No action is necessary and testing is complete.
NO : Repair or replace the damaged component(s). Refer to General (Electrical) Harness Connector Inspection. Check if the door mirror heater function (heated door mirrors) works normally.
INSPECTION PROCEDURE 2: Right or Left Heated Door Mirror does not Operate
Heated Door Mirror Circuit (Part 1):
Heated Door Mirror Circuit (Part 2):
CIRCUIT OPERATION
If the heater function (heated door mirror) of either of the door mirrors does 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
STEP1.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 8.
STEP 2.Check the heated door mirror (LH).
CAUTION: When relocating the car between locations with extremely different temperatures (warm and cold), leave the car in the location for a while to adapt to the temperature prior to checking it.
The resistance value between door mirror (LH) connector terminals 1 and 4 should meet the standard value with the ambient temperature at a steady 25° C (77° F).
Standard value: 5.9 - 7.8 ohm
Q: Is the heater function (heated door mirror) of the door mirror normal?
YES : Go to Step 3.
NO : Replace the door mirror (LH). Check to see that the heater function (heated door mirror) of the door mirror (LH) is operating normally.
STEP 3.Check the ground circuit to the door mirror (LH). Test at remote controlled mirror (LH) connector E-04.
1. Disconnect remote controlled mirror (LH) connector E-04 and measure the resistance available at the wiring harness side of the connector.
2. Measure the resistance value between terminal 4 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 4.
STEP 4.Check remote controlled mirror (LH) connector E-04 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Is remote controlled mirror (LH) connector E-04 in good condition?
YES : Go to Step 5.
NO : Repair or replace the damaged component(s). Refer to General (Electrical) Harness Connector Inspection. Check to see that the heater function (heated door mirror) of the door mirror (LH) operates normally.
STEP 5.Check the wiring harness between remote controlled mirror (LH) connector E-04 (terminal 4) 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 General (Electrical) Harness Connector Inspection.
Q: Is the wiring harness between remote controlled mirror (LH) connector E-04 (terminal 4) and ground in good condition?
YES : No action is necessary and testing is complete.
NO : The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Check to see that the heater function (heated door mirror) of the door mirror (LH) operates normally.
STEP 6.Check remote controlled mirror (LH) connector E-04 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Is remote controlled mirror (LH) connector E-04 in good condition?
YES : Go to Step 7.
NO : Repair or replace the damaged component(s). Refer to General (Electrical) Harness Connector Inspection. Check to see that the heater function (heated door mirror) of the door mirror (LH) operates normally.
STEP 7.Check the wiring harness between remote controlled mirror (LH) connector E-04 (terminal 1) and junction block connector C-215 (terminal 3).
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 General (Electrical) Harness Connector Inspection.
Q: Is the wiring harness between remote controlled mirror (LH) connector E-04 (terminal 1) and junction block connector C-215 (terminal 3) in good condition?
YES : No action is necessary and testing is complete.
NO : The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Check to see that the heater function (heated door mirror) of the door mirror (LH) operates normally.
STEP 8.Check the heated door mirror (RH).
CAUTION: When relocating the car between locations with extremely different temperatures (warm and cold), leave the car in the location for a while to adapt to the temperature prior to checking it.
The resistance value between door mirror (RH) connector terminals 1 and 4 should meet the standard value with the ambient temperature at a steady 25° C (77° F).
Standard value: 5.9 - 7.8 ohm
Q: Is the heater function (heated door mirror) of the door mirror normal?
YES : Go to Step 9.
NO : Replace the door mirror (RH). Check to see that the heater function (heated door mirror) of the door mirror (RH) operates normally.
STEP 9.Check the ground circuit to the door mirror (RH). Test at remote controlled mirror (RH) connector E-12.
1. Disconnect remote controlled mirror (RH) connector E-12 and measure the resistance available at the wiring harness side of the connector.
2. Measure the resistance value between terminal 4 and ground.
- The resistance should equal 2 ohms or less.
Q: Is the measured resistance 2 ohms or less?
YES : No action is necessary and testing is complete.
NO : Go to Step 12.
STEP 10.Check remote controlled mirror (RH) connector E-12 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Is remote controlled mirror (RH) connector E-12 in good condition?
YES : Go to Step 11.
NO : Repair or replace the damaged component(s). Refer to General (Electrical) Harness Connector Inspection. Check to see that the heater function (heated door mirror) of the door mirror (RH) operates normally.
STEP 11.Check the wiring harness between remote controlled mirror (RH) connector E-12 (terminal 4) and ground.
NOTE: Also check intermediate connector C-106 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-106 is damaged, repair or replace the damaged component(s) as described in General (Electrical) Harness Connector Inspection.
Q: Is the wiring harness between remote controlled mirror (RH) connector E-12 (terminal 4) and ground in good condition?
YES : No action is necessary and testing is complete.
NO : The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Check to see that the heater function (heated door mirror) of the door mirror (RH) operates normally.
STEP 12. Check remote controlled mirror (RH) connector E-12 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Is remote controlled mirror (RH) connector E-12 in good condition?
YES : Go to Step 13.
NO : Repair or replace the damaged component(s). Refer to General (Electrical) Harness Connector Inspection. Check to see that the heater function (heated door mirror) of the door mirror (RH) operates normally.
STEP 13.Check the wiring harness between remote controlled mirror (RH) connector E-12 (terminal 1) and junction block connector C-215 (terminal 3).
NOTE: Also check intermediate connector C-106 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-106 is damaged, repair or replace the damaged component(s) as described in General (Electrical) Harness Connector Inspection.
Q: Is the wiring harness between remote controlled mirror (RH) connector E-12 (terminal 1) and junction block connector C-215 (terminal 3) in good condition?
YES : No action is necessary and testing is complete.
NO : The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary. Check to see that the heater function (heated door mirror) of the door mirror (RH) operates normally.