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Wiper and Washer Switch Circuit [08/2015 - 08/2017]: Procedure

  1. CHECK VEHICLE CONDITION 
    1. Check whether the rear wiper and washer systems operate normally.
      RESULT

      Result Proceed to
      Rear wiper and washer systems do not operate. A
      Rear wiper system does not operate. B
      Rear washer system does not operate. C

    Result: 

    B 

    See step  8

    Result: 

    C 

    See step  10

    Result: 

    A 

    See step  2

  2. INSPECT FUSE (ECU-IG No. 2) 
    1. Remove the ECU-IG No. 2 fuse from the main body ECU.
      GTY234411Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      ECU-IG No. 2 fuse Always Below 1 Ω
    3. Reinstall the ECU-IG No. 2 fuse.

    Result: 

    NG 

    REPLACE FUSE 

    Result: 

    OK 

    See step  3

  3. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY 
    1. Remove the windshield wiper switch assembly.
      GTY227107Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Inspect the rear wiper switch.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      2 (EW) - 6 (C1R) Rear wiper switch OFF 10 kΩ or higher
      2 (EW) - 7 (+1R)
      6 (C1R) -7 (+1R)
      2 (EW) - 6 (C1R) Rear wiper switch LO Below 1 Ω
      2 (EW) - 7 (+1R) Rear wiper switch HI Below 1 Ω
    4. Inspect the rear washer switch.
    5. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      2 (EW) - 7 (+1R) Rear washer switch OFF 10 kΩ or higher
      2 (EW) - 5 (WR)
      5 (WR) - 7 (+1R)
      2 (EW) - 5 (WR) Rear washer switch ON (Rear wiper switch in OFF position) Below 1 Ω
      2 (EW) - 7 (+1R) Rear washer switch ON (Rear wiper switch in ON position) Below 1 Ω
      2 (EW) - 5 (WR)
      5 (WR) - 7 (+1R)
    6. Reinstall the the windshield wiper switch assembly.

    Result: 

    NG 

    REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY 

    (Refer to REMOVAL [08/2015 - 08/2019] )

    Result: 

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH - BODY GROUND) 
    1. Disconnect the H14 windshield wiper switch assembly connector.
      GTY543500Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H14-2 (EW) - Body ground Always Below 1 Ω
    3. Reconnect the windshield wiper switch assembly connector.

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  5

  5. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH - MAIN BODY ECU) 
    1. Disconnect the H3 and H4 main body ECU connector.
      GTY578458Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Inspect the rear wiper switch.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      H3-2 (RWIN) - Body ground Rear wiper switch OFF 10 kΩ or higher
      H3-9 (RWON) - Body ground
      H3-2 (RWIN) - Body ground Rear wiper switch LO Below 1 Ω
      H3-9 (RWON) - Body ground Rear wiper switch HI Below 1 Ω
      H4-7 (RWSW) - Body ground Rear washer switch ON (Rear wiper switch in ON position) Below 1 Ω
    4. Inspect the rear washer switch.
    5. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      H4-7 (RWSW) - Body ground Rear washer switch OFF 10 kΩ or higher
      H4-7 (RWSW) - Body ground Rear washer switch ON (Rear wiper switch in ON position) Below 1 Ω
      Rear washer switch ON (Rear wiper switch in OFF position) Below 1 Ω
    6. Reconnect the main body ECU connector.

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  6

  6. CHECK HARNESS AND CONNECTOR (BATTERY - MAIN BODY ECU) 
    1. Disconnect the DA main body ECU connector.
      GTY246715Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      DA-1 - Body ground Always 11 to 14 V
    3. Reconnect the main body ECU connector.

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  7

  7. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - IGNITION SWITCH, BODY GROUND) 
    1. Disconnect the DD main body ECU connector.
      GTY579943Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      DD-43 - Body ground Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      DD-62 - Body ground Always Below 1 Ω
    4. Reconnect the main body ECU connector.

    Result: 

    OK 

    REPLACE MAIN BODY ECU 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  8. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY 
    1. Remove the windshield wiper switch assembly.
      GTY235732Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      2 (EW) - 6 (C1R) Rear wiper switch OFF 10 kΩ or higher
      2 (EW) - 7 (+1R)
      6 (C1R) - 7 (+1R)
      2 (EW) - 6 (C1R) Rear wiper switch LO Below 1 Ω
      2 (EW) - 7 (+1R) Rear wiper switch HI Below 1 Ω
    3. Reinstall the windshield wiper switch assembly.

    Result: 

    NG 

    REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY 

    (Refer to REMOVAL [08/2015 - 08/2019] )

    Result: 

    OK 

    See step  9

  9. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH - MAIN BODY ECU, BODY GROUND) 
    1. Disconnect the H3 main body ECU connector.
      GTY551859Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      H3-2 (RWIN) - Body ground Rear wiper switch OFF 10 kΩ or higher
      H3-9 (RWON) - Body ground
      H3-2 (RWIN) - Body ground Rear wiper switch LO Below 1 Ω
      H3-9 (RWON) - Body ground Rear wiper switch HI Below 1 Ω
    3. Reconnect the main body ECU connector.

    Result: 

    OK 

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

    (Refer to PROBLEM SYMPTOMS TABLE [08/2015 - 08/2017] )

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  10. INSPECT WINDSHIELD WIPER SWITCH ASSEMBLY 
    1. Remove the windshield wiper switch assembly.
      GTY246705Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      2 (EW) - 7 (+1R) Rear washer switch OFF 10 kΩ or higher
      2 (EW) - 5 (WR)
      5 (WR) - 7 (+1R)
      2 (EW) - 7 (+1R) Rear washer switch ON (Rear wiper switch in ON position) Below 1 Ω
      2 (EW) - 5 (WR)
      5 (WR) - 7 (+1R)
    3. Reinstall the windshield wiper switch assembly.

    Result: 

    NG 

    REPLACE WINDSHIELD WIPER SWITCH ASSEMBLY 

    (Refer to REMOVAL [08/2015 - 08/2019] )

    Result: 

    OK 

    See step  11

  11. CHECK HARNESS AND CONNECTOR (WINDSHIELD WIPER SWITCH - MAIN BODY ECU, BODY GROUND) 
    1. Disconnect the H4 main body ECU connector.
      GTY573870Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      H4-7 (RWSW) - Body ground Rear washer switch OFF 10 kΩ or higher
      H4-7 (RWSW) - Body ground Rear washer switch ON (Rear wiper switch in ON position) Below 1 Ω
      Rear washer switch ON (Rear wiper switch in OFF position) Below 1 Ω
    3. Reconnect the main body ECU connector.

    Result: 

    OK 

    PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

    (Refer to PROBLEM SYMPTOMS TABLE [08/2015 - 08/2017] )

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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