Power Mirror Control System: Inspection

WARNING: This page is about a different car, the 2002 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Mirror Switch & Connector Terminals

INSPECT MIRROR SWITCH CONTINUITY

Fig 2: Mirror Switch Continuity Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If continuity is not as specified, replace the switch.
INSPECT MIRROR SWITCH RESISTANCE
Measure resistance between terminals 7 and 9 at each switch position, as shown in the chart.

Fig 3: Inspecting Mirror Switch Resistance
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If resistance is not as specified, replace the switch.
INSPECT RETRACT SWITCH CONTINUITY

Fig 4: Inspecting Retract Switch Continuity
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 5: Identifying Retract Switch Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If continuity is not as specified, replace the switch.
INSPECT MIRROR MOTOR OPERATION
1. Connect the positive (+) lead from the battery to terminal 9 and the negative (-) lead to terminal 11, and check that the mirror turns to the left side.
  
  Fig 6: Checking Mirror Turns Left Side
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Reverse the polarity, and check that the mirror turns to the right side.
  
  Fig 7: Checking Mirror Turns Right Side
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 10, and check that the mirror turns upward.
  
  Fig 8: Checking That Mirror Turns Upward
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Reverse the polarity, and check that the mirror turns downward.
If operation is not as specified, replace the mirror assembly.

Fig 9: Checking That Mirror Turns Downward
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
w/ Driving position memory only: INSPECT MIRROR POSITION SENSORS OPERATION
HINT:

Strip off the vinyl tape of the connector and remove terminals 1, 5, 6, 9, 10, 13 and 14 from the connector housing.
1. Connect a series of three 1.5 V dry cell batteries.
2. Connect the positive (+) lead from the dry cell batteries to terminal 5 and the negative (-) lead to terminal 14.
3. Connect the positive (+) lead from the voltmeter to terminal 6 and the negative (-) lead to terminal 14.
4. Apply battery positive voltage to terminals 1 and 10, then check that the voltage gradually changes according to the table below while the mirror moves between the uppermost position and lowermost position.
  
  Fig 10: Checking Voltage Change While Mirror Moves To Lowermost Position
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 11: Checking Voltage Change While Mirror Moves To Uppermost Position
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 12: Mirror Position & Voltage Specification Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If voltage value is not as specified, replace the motor assembly.
5. Disconnect the 4 leads of the battery and voltmeter.
6. Connect the positive (+) lead from the voltmeter to terminal 13 and negative (-) lead to terminal 14.
7. Apply battery positive voltage to terminals 9 and 10, then the table below while the mirror moves between the left-most position and right-most position.
  
  Fig 13: Checking Voltage Change While Mirror Moves To Right-Most Position
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 14: Checking Voltage Change While Mirror Moves To Left-Most Position
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 15: Mirror Position & Voltage Specification Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If continuity is not as specified, replace the switch.
INSPECT MIRROR POSITION SENSOR CIRCUIT
(See POWER MIRRORS and MEMORY SYSTEMS )
INSPECT DRIVING POSITION MEMORY AND RETURN SWITCH CONTINUITY

Fig 16: Driving Position Memory And Return Switch Continuity Table
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 17: Driving Position Memory And Return Switch Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If continuity is not as specified, replace the switch.
INSPECT ELECTRICAL RETRACT MOTOR OPERATION
1. When folded front position:
  1. Connect the positive (+) lead from the battery to terminal 3 and negative (-) lead to terminal 11, check that the mirror operates at retract position.
  2. Reverse the polarity, check that the mirror operate.
  If operation is not as specified, replace the mirror assembly.
2. Between folded front position and driving position:
  1. Connect the positive (+) lead from the battery to terminal 3 and negative (-) lead to terminal 11, check that the mirror operates at retract position.
  2. Reverse the polarity, check that the mirror operate at folded front position.
  If operation is not as specified, replace the mirror assembly.
3. When driving position:
  1. Connect the positive (+) lead from the battery to terminal 3 and negative (-) lead to terminal 11, check that the mirror operates at retract position.
    
    Fig 18: Identifying Mirror Positions
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Reverse the polarity, check that the mirror does not operate.
  If operation is not as specified, replace the mirror assembly.
4. Between driving position and retract position:
  1. Connect the positive (+) lead from the battery to terminal 3 and negative (-) lead to terminal 11, check that the mirror operates at retract position.
  2. Reverse the polarity, check that the mirror operate at return position (Stopping at driving position).
  If operation is not as specified, replace the mirror assembly.
5. When retract position:
1. Connect the positive (+) lead from the battery to terminal 3 and negative (-) lead to terminal 11, check that the mirror does not operates.
2. Reverse the polarity, check that the mirror operate at return position (Stopping at driving position).
If operation is not as specified, replace the mirror assembly.