RX400h · Service Manual BODY ELECTRICAL

INSPECTION

Inspection


WINDSHIELD WIPER SWITCH ASSEMBLY

  1. E068144E02
    Check the continuity of windshield wiper switch assembly.

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

      Standard resistance:
      Front Wiper Switch ( w/o Rain Sensor) 
      Switch position
      		 Tester connection
      		 Specified resistance
      MIST
      		 C10-2 (+B) - C10-3 (+1)
      		 Below 1 Ω
      OFF
      		 C10-1 (+S) - C10-3 (+1)
      		 Below 1 Ω
      INT
      		 C10-1 (+S) - C10-3 (+1)
      		 Below 1 Ω
      LO
      		 C10-2 (+B) - C10-3 (+1)
      		 Below 1 Ω
      HI
      		 C10-2 (+B) - C10-4 (+2)
      		 Below 1 Ω
      Front Wiper Switch ( w/ Rain Sensor) 
      Switch position
      		 Tester connection
      		 Specified resistance
      MIST
      		 C10-2 (+B) - C10-3 (+1)
      		 Below 1 Ω
      OFF
      		 C10-1 (+S) - C10-3 (+1)
      		 Below 1 Ω
      AUTO
      		 C10-1 (+S) - C10-3 (+1)
      C10-9 (AUTO) - C10-10 (E)
      		 Below 1 Ω
      LO
      		 C10-2 (+B) - C10-3 (+1)
      		 Below 1 Ω
      HI
      		 C10-2 (+B) - C10-4 (+2)
      		 Below 1 Ω
      Rear Wiper Switch 
      Switch position
      		 Tester connection
      		 Specified resistance
      OFF
      		 -
      		 10 kΩ or higher
      INT
      		 C11-2 (EW) - C11-6 (C1R)
      		 Below 1 Ω
      ON
      		 C11-2 (EW) - C11-7 (+1R)
      		 Below 1 Ω
      Front Washer Switch 
      Switch position
      		 Tester connection
      		 Specified resistance
      OFF
      		 -
      		 10 kΩ or higher
      ON
      		 C11-2 (EW) - C11-3 (WF)
      		 Below 1 Ω
      Rear Washer Switch 
      Switch position
      		 Tester connection
      		 Specified resistance
      OFF
      		 -
      		 10 kΩ or higher
      ON (Rear wiper switch OFF position side)
      		 C11-2 (EW) - C10-5 (WR)
      		 Below 1 Ω
      ON (Rear wiper switch ON position side)
      		 C11-2 (EW) - C10-5 (WR)
      C11-2 (EW) - C10-7 (+1R)
      		 Below 1 Ω

  1. Intermittent Operation Check ( w/o Rain Sensor)

    1. Connect the voltmeter (+) terminal to terminal C10-3 (+1) of the connector and the voltmeter (-) terminal to C11-2 (EW).

    2. Connect the position battery (+) lead to terminal C10-2 (+B) of the connector and the negative battery (-) lead to terminals C11-2 (EW) and C10-1 (+S).

    3. Turn the wiper switch to the INT position.

    4. Connect the position battery (+) lead to the terminal C10-1 (+S) of the connector for 5 seconds.

    5. Connect the negative battery (-) lead to terminal C10-4 (+S) of the connector. Operate the intermittent wiper relay and measure the voltage between terminal C10-3 (+1) and terminal C11-2 (EW).

      E056399E09

  1. Front Wiper Operation Check ( w/o Rain Sensor)

    1. Turn the wiper switch to the OFF position.

    2. I030007E02
      Connect the position battery (+) lead to terminal C10-2 (+B) of the connector, the negative battery (-) lead to the terminals C10-1 (+S) and the terminal C11-2 (EW).

    3. Connect the voltmeter (+) terminal to the terminal C10-3 (+1) of the connector and the voltmeter (-) terminal to the terminal C11-2 (EW) of the connector. Turn the washer switch to the ON and OFF position, and measure the voltage between terminal C10-3 (+1) and terminal C11-2 (EW).

  1. E068142E02
    Rain Sensor Adjust Switch Operation Check (w/ Rain Sensor)

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

      Tester connection
      		 Condition
      		 Specified condition
      C10-7 (VR1) - C10-8 (VR2)
      		 A position
      		 Below 10 Ω
      C10-7 (VR1) - C10-8 (VR2)
      		 B position
      		 405 to 493 Ω
      C10-7 (VR1) - C10-8 (VR2)
      		 C position
      		 1400 to 1700 Ω
      C10-7 (VR1) - C10-8 (VR2)
      		 Dposition
      		 2200 to 3200 Ω

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