Power Mirror Control System: Inspection

1. The L side of the left/right adjustment switch:

   Check the continuity of the mirror switch.

   OK 

   TESTER CONNECTION AND SPECIFIED CONDITION CHART
   
   

   Tester Connection	Switch Condition	Specified Condition
   3 - 4 1 - 7 7 - 8	UP	Continuity
   	OFF	No continuity
   1 - 3 3 - 8 4 - 7	DOWN	Continuity
   	OFF	No continuity
   4 - 9 1 - 7 7 - 8	LEFT	Continuity
   	OFF	No continuity
   4 - 7 1 - 8 8 - 9	RIGHT	Continuity
   	OFF	No continuity

   Fig 1: Inspecting Outer Rear View Mirror Switch Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   If the continuity is not as specified, replace the switch.

2. The R side of the left/right adjustment switch:

   Check the continuity of the mirror switch.

   OK 

   TESTER CONNECTION AND SPECIFIED CONDITION CHART
   
   

   Tester Connection	Switch Condition	Specified Condition
   2 - 4 1 - 7 7 - 8	UP	Continuity
   	OFF	No continuity
   4 - 7 1 - 2 2 - 8	DOWN	Continuity
   	OFF	No continuity
   4 - 10 1 - 7 7 - 8	LEFT	Continuity
   	OFF	No continuity
   4 - 7 1 - 8 8 - 10	RIGHT	Continuity
   	OFF	No continuity

   If the continuity is not as specified, replace the switch.

3. Check the continuity of the retract switch.

   OK 

   TESTER CONNECTION AND SPECIFIED CONDITION CHART
   
   

   Tester Connection	Switch Condition	Specified Condition
   1 - 5 2 - 4	RETURN	Continuity
   1 - 2 4 - 5	RETRACT	Continuity

   If the continuity is not as specified, replace the switch.

   Fig 2: Checking Continuity Of Retract Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Check the mirror switch circuit.
   1. Disconnect the connector from the switch and check the connector on the wire harness side.

      OK 

      TESTER CONNECTION AND SPECIFIED CONDITION CHART
      
      

      Tester Connection	Condition	Specified Condition
      8 - Ground	Always	Continuity
      4 - Ground	Ignition switch OFF	No voltage
      4 - Ground	Ignition switch ACC or ON	Battery positive voltage

      If the circuit is not as specified, inspect the parts connected to the circuit.

   Fig 3: Identifying Mirror Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Check the indicator light operation.
   1. Connect the positive (+) lead from the battery to terminal 5 and the negative (-) lead to terminal 6, and check that the indicator light lights up.

      If the indicator light does not light up, replace the switch.

   Fig 4: Checking Indicator Light Operation

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check the mirror motor operation.
   1. Connect the positive (+) lead from the battery to terminal 8 and the negative (-) lead to terminal 7, and check that the mirror surface turns outward.
      Fig 5: Checking Mirror Surface Turns Outward

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Reverse the polarity of the battery leads, and check that the mirror surface turns inward.
      Fig 6: Checking Mirror Surface Turns Inward

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Connect the battery positive (+) lead to terminal 6 and the battery negative (-) lead to terminal 7, and check that the mirror turns upward.
      Fig 7: Checking Mirror Turns Upward

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   4. Reverse the polarity of the battery leads, and check that the mirror turns downward.

      If the operation is not as specified, replace the mirror assembly.

   Fig 8: Checking Mirror Turns Downward

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. w/ Driving position memory:

   Check the mirror position sensor operation.

   Fig 9: Checking Mirror Position Sensor Operation

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   Strip off the vinyl tape on the connector and remove terminals 6, 7, 9, 10, 15 and 16 from the connector housing.

   1. Connect 3 1.5 V dry cell batteries in series.
   2. Connect the positive (+) lead from the dry cell batteries to terminal 9 and its negative (-) lead to terminal 15.
   3. Connect the voltmeter positive (+) lead to terminal 16 and the voltmeter negative (-) lead to terminal 15.
   4. Apply battery positive voltage to terminal 7 and 6, and then check that the voltage gradually changes as shown in the table below while the mirror moves between the uppermost position and the lowermost position.
      Fig 10: Checking Voltage Gradually Changes

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage 

      MIRROR POSITION SPECIFICATION
      
      

      Mirror Position	Lowermost	Mirror Position	Uppermost
      Voltage	2.8 to 5.0	Changes Gradually	0 to 1.8

      If the voltage value is not as specified, replace the motor assembly.

   5. Disconnect the 4 leads of the battery and voltmeter.
   6. Connect the voltmeter positive (+) lead to terminal 10 and the voltmeter negative (-) lead to terminal 15.
      Fig 11: Connecting Voltmeter Positive (+) Lead To Terminal 10 And Voltmeter Negative (-) Lead To Terminal 15

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   7. Apply battery positive voltage to terminal 7 and 8, and then check that the voltage gradually changes as shown in the table below while the mirror moves between the left most position and right most position.
      Fig 12: Applying Battery Positive Voltage To Terminal 7 And 8

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage 

      MIRROR POSITION SPECIFICATION
      
      

      Mirror Position	Left-most	Mirror Position	Right-most
      Voltage LEFT	2.8 to 5.0	Changes gradually	0 to 18
      Voltage RIGHT	0 to 18	Changes gradually	2.8 to 5.0

      If the voltage value is not as specified, replace the motor assembly.

1. Check the continuity of the switch.
   Fig 13: Identifying Driving Position Memory And Return Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK 

   TESTER CONNECTION AND SPECIFIED CONDITION CHART
   
   

   Tester Connection	Switch Position	Specified Condition
   3 - 4	SET switch ON	Continuity
   2 - 3	Return SW1 ON	Continuity
   1 - 3	Return SW2 ON	Continuity

   If the continuity is not as specified, replace the switch.

1. Disconnect the connector from the ECU and inspect the connector on the wire harness side.
   Fig 14: Inspecting Mirror Control ECU Circuit

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK 

   TESTER CONNECTION AND SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   3 - 16	Right side mirror switch to RIGHT	Continuity
   4 - 16	Left side mirror switch to RIGHT	Continuity
   5 - 16	Right side mirror switch to DOWN	Continuity
   6 - 16	Left side mirror switch to DOWN	Continuity
   3 - 17	Right side mirror switch to LEFT	Continuity
   4 - 17	Left side mirror switch to LEFT	Continuity
   5 - 17	Right side mirror switch to UP	Continuity
   6 - 17	Left side mirror switch to UP	Continuity
   7 - 19	Constant	Continuity
   14 - Ground	Constant	Continuity

   If the circuit is not as specified, inspect the circuits connected to other parts.

2. Disconnect the connector from the ECU and inspect the connector on the wire harness side.

   OK 

   TESTER CONNECTION AND SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   1 - Ground	Constant	Battery positive voltage
   2 - Ground	Ignition switch OFF	No voltage
   2 - Ground	Ignition switch ACC or ON	Battery positive voltage

   If the circuit is not as specified, inspect the circuits connected to other parts.

   Fig 15: Disconnecting Connector From ECU

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Connect the connectors, and using a voltmeter with high impedance (10 kΩ/V minimum), measure the voltage at each terminal and body ground.
   Fig 16: Inspecting Mirror Control ECU Operation

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK 

If the operation is not as specified, inspect the wire harness, the mirror switch or the motor assembly. If these are correct, replace the ECU.