LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2017 >> ES 350 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Wiper/Washer Systems >> Wiper System / Washer System (Diagnostics & Circuit Tests) >> Wiper And Washer System >> Circuit Tests >> Rain Sensor Circuit [07/2015 - ] >> Procedure

Rain Sensor Circuit [07/2015 - ]: Procedure

  1. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER RELAY ASSEMBLY - RAIN SENSOR) 
    1. w/o GSP ECU
      1. Disconnect the H51 windshield wiper relay assembly connector.
      2. Disconnect the T1 rain sensor connector.
      3. Measure the voltage according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        H51-14 (MPX1) - T1-1 (MPX) Always Below 1 Ω
        T1-1 (MPX) - Body ground Always 10 kΩ or higher
    2. w/ GSP ECU
      1. Disconnect the H51 windshield wiper relay assembly connector.
      2. Disconnect the T14 rain sensor connector.
      3. Measure the voltage according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        H51-14 (MPX1) - T14-1 (MPX) Always Below 1 Ω
        T14-1 (MPX) - Body ground Always 10 kΩ or higher

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  OK

    OK 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (ROOF CONSOLE BOX ASSEMBLY - IG CIRCUIT AND BODY GROUND) 
    1. Disconnect the T10 roof console box assembly.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      T10-1 (IG) - T10-19 (GND) Engine switch on (IG) 11 to 14 V

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  OK

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (RAIN SENSOR - ROOF CONSOLE BOX ASSEMBLY) 
    1. w/o GSP ECU
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        T1-2 (ES) - T10-21 (GND2) Always Below 1 Ω
        T1-4 (SIG) - T10-14 (IG2) Always Below 1 Ω
    2. w/ GSP ECU
      1. Measure the resistance according to the value(s) in the table below.

        Standard Resistance

        Tester Connection Condition Specified Condition
        T14-2 (ES) - T10-21 (GND2) Always Below 1 Ω
        T14-4 (SIG) - T10-14 (IG2) Always Below 1 Ω

    Result:  NG

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result:  OK

    OK 

    See step  4

  4. INSPECT ROOF CONSOLE BOX ASSEMBLY 
    1. w/o GSP ECU
      1. Reconnect the T10 roof console box assembly.
      2. Measure the voltage according to the value(s) in the table below.

        Standard Voltage

        Tester Connection Condition Specified Condition
        T1-4 (SIG) - T1-2 (ES) Engine switch on (IG) 11 to 14 V
    2. w/ GSP ECU
      1. Reconnect the T10 roof console box assembly.
      2. Measure the voltage according to the value(s) in the table below.

        Standard Voltage

        Tester Connection Condition Specified Condition
        T14-4 (SIG) - T14-2 (ES) Engine switch on (IG) 11 to 14 V

    Result:  NG

    NG 

    REPLACE ROOF CONSOLE BOX ASSEMBLY 

    (Refer to REMOVAL [07/2015 - ] )

    Result:  OK

    OK 

    See step  5

  5. INSPECT RAIN SENSOR 
    1. w/o GSP ECU
      1. Reconnect the T1 rain sensor connector.
      2. Connect an oscilloscope to the rain sensor connector.
      3. Check for pulses.
        GTY667028Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        OK

        Tester Connection Condition Specified Condition
        T1-1 (MPX) - T1-2 (ES) Engine switch on (IG) Pulse generation
    2. w/ GSP ECU
      1. Reconnect the T14 rain sensor connector.
      2. Connect an oscilloscope to the rain sensor connector.
      3. Check for pulses.

        OK

        Tester Connection Condition Specified Condition
        T14-1 (MPX) - T14-2 (ES) Engine switch on (IG) Pulse generation
        TEXT IN ILLUSTRATION

        *a Component with harness connected
        (Rain Sensor)
        *A w/o GSP ECU
        *B w/ GSP ECU

    Result:  OK

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

    (Refer to PROBLEM SYMPTOMS TABLE [07/2015 - ] )

    Result:  NG

    NG 

    REPLACE RAIN SENSOR 

    (Refer to REMOVAL [07/2015 - ] )

scientia non olet · About LEMON Manuals