Inspection Procedure

CHECK DTC

Use the Techstream to check if the CAN communication system is functioning normally.

Result:

RESULT REFERENCE CHART

Result	Proceed to
CAN DTC is not output	A
CAN DTC is output	B

B: GO TO CAN COMMUNICATION SYSTEM (See HOW TO PROCEED WITH TROUBLESHOOTING )

A: Go to next step

CHECK DEFOGGER SYSTEM
1. Check that the defogger operates normally.
  OK:
  
  Defogger operates normally.
  
  NG: GO TO WINDOW DEFOGGER SYSTEM (See SYSTEM DESCRIPTION )
  
  OK: Go to next step

PERFORM ACTIVE TEST USING TECHSTREAM (MIRROR HEATER FUNCTION)

Select the Active Test, use the Techstream to generate a control command, and then check the mirror heater function.

Driver Door

ACTIVE TEST REFERENCE CHART

Tester Display	Test Part	Control Range
Mirror Heater	Mirror heater operation	OFF/ON

Passenger Door

ACTIVE TEST REFERENCE CHART

Tester Display	Test Part	Control Range
Mirror Heater	Mirror heater operation	OFF/ON

Result (Driver Side):

RESULT REFERENCE CHART

Result	Proceed to
Outer rear view mirror LH does not operate normally	A
Outer rear view mirror LH operates normally	B

Result (Passenger Side):

RESULT REFERENCE CHART

Result	Proceed to
Outer rear view mirror RH does not operate normally	C
Outer rear view mirror RH operates normally	D

B: REPLACE AIR CONDITIONING AMPLIFIER (See REMOVAL )

C: Go to step 5

D: REPLACE AIR CONDITIONING AMPLIFIER (See REMOVAL )

A: Go to next step

INSPECT OUTER REAR VIEW MIRROR ASSEMBLY LH

Remove the mirror LH (see REMOVAL ).

Check the operation of the mirror heater.

Measure the resistance according to the value(s) in the table below.

Standard resistance

STANDARD RESISTANCE REFERENCE CHART

Tester Connection	Condition	Specified Condition
4 (HTR+) - 12 (HTR-)	25°C (75°F)	3.0 to 4.0 Ω

Apply battery voltage and check the mirror heater operation.

VOLTAGE REFERENCE CHART

Measurement Condition	Specified Condition
Battery positive (+) → Terminal 4 (HTR+) Battery negative (-) → Terminal 12 (HTR-)	Mirror becomes warm

HINT:

It will take a short time for the mirror to become warm.

Fig 1: Identifying Outer Rear View Mirror LH Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH (See REMOVAL )

OK: REPLACE FRONT DOOR ECU LH (See REMOVAL )

INSPECT OUTER REAR VIEW MIRROR ASSEMBLY RH

Remove the mirror RH (see REMOVAL ).

Check the operation of the mirror heater.

Measure the resistance according to the value(s) in the table below.

Standard resistance

STANDARD RESISTANCE REFERENCE CHART

Tester Connection	Condition	Specified Condition
4 (HTR+) - 12 (HTR-)	25°C (75°F)	3.0 to 4.0 Ω

Apply battery voltage and check the mirror heater operation.

VOLTAGE REFERENCE CHART

Measurement Condition	Specified Condition
Battery positive (+) → Terminal 4 (HTR+) Battery negative (-) → Terminal 12 (HTR-)	Mirror becomes warm

HINT:

It will take a short time for the mirror to become warm.

Fig 2: Identifying Outer Rear View Mirror RH Connector Terminals

NG: REPLACE OUTER REAR VIEW MIRROR ASSEMBLY RH (See REMOVAL )

OK: REPLACE FRONT DOOR ECU RH (See REMOVAL )