Section 249 (Power Mirror Control System): Inspection

WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT MIRROR SWITCH CONTINUITY

INSPECTION MIRROR SWITCH CONTINUITY

Switch position	Tester connection	Resistance (Ω)
LEFT	8 - 9	100
RIGHT	8 - 9	0
Illumination	5 - 6	Continuity

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.

RESISTANCE SPECIFICATIONS

Switch position	Resistance (Ω)
UP	Approx. 100
RIGHT	250
DOWN	470
LEFT	800

If resistance is not as specified, replace the switch.

Fig 1: Identifying Mirror Switch Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT RETRACT SWITCH CONTINUITY

RESISTANCE SPECIFICATIONS

Switch position	Tester connection	Specified condition
RETURN	-	No continuity
RETRACT	1 - 2	Continuity

If continuity is not as specified, replace the switch.

Fig 2: Identifying Retract Switch Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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 3: Inspecting Mirror Motor Operation (1 Of 4)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Reverse the polarity, and check that the mirror turns to the right side.
  
  Fig 4: Inspecting Mirror Motor Operation (2 Of 4)
  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 5: Inspecting Mirror Motor Operation (3 Of 4)
  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 6: Inspecting Mirror Motor Operation (4 Of 4)
  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.

Connect a series of three 1.5 V dry cell batteries.
Connect the positive (+) lead from the dry cell batteries to terminal 5 and the negative (-) lead to terminal 14.
Connect the positive (+) lead from the voltmeter to terminal 6 and the negative (-) lead to terminal 14.

Fig 7: Inspecting Mirror Position Sensors Operation (1 Of 4)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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.

MIRROR POSITION

Mirror position	Lowermost	Mirror position	Uppermost
Voltage	2.8 - 5.0	Changes gradually	0 - 1.0

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

Fig 8: Inspecting Mirror Position Sensors Operation (2 Of 4)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the 4 leads of the battery and voltmeter.
Connect the positive (+) lead from the voltmeter to terminal 13 and negative (-) lead to terminal 14.

Fig 9: Inspecting Mirror Position Sensors Operation (3 Of 4)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Apply battery positive voltage to terminals 9 and 10, then the table below while the mirror moves between the leftmost position and right-most position.

MIRROR POSITION

Mirror position	Lowermost	Mirror position	Uppermost
Voltage LEFT	2.8 - 5.0	Changes gradually	0 - 1.0
Voltage RIGHT	0 - 1.0	Changes gradually	2.8 - 5.0

If continuity is not as specified, replace the switch.

Fig 10: Inspecting Mirror Position Sensors Operation (4 Of 4)

INSPECT MIRROR POSITION SENSOR CIRCUIT
Driver side: (See MIRROR POSITION SENSOR CIRCUIT (W/ MEMORY) )

Passenger side: (See MIRROR POSITION SENSOR CIRCUIT (W/ MEMORY) )

INSPECT DRIVING POSITION MEMORY AND RETURN SWITCH CONTINUITY

CONNECTOR TERMINALS SPECIFIED CONDITION

Switch position	Tester connection	Specified condition
SET switch ON	2 - 6	Continuity
Return switch 1 ON	3 - 6	Continuity
Return switch2 ON	4 - 6	Continuity
Return switch3 ON	5 - 6	Continuity

If continuity is not as specified, replace the switch.

Fig 11: Identifying Driving Position Memory And Return Switch Connector Terminals

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 12: Inspecting Electrical Retract Motor Operation
    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.