WIPER AND WASHER SYSTEM TERMINALS OF ECU


  1. CHECK WINDSHIELD WIPER RELAY ASSEMBLY

    A003XZ5E14

    1. Disconnect the H75 windshield wiper relay assembly connector.

    2. Measure the voltage and resistance according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      H75-4 (W) - Body ground B - Body ground Front washer switch circuit Front washer switch on Below 1 Ω
      Front washer switch off 10 kΩ or higher
      H75-6 (VR2) - H75-7 (VR1) W - G Adjusting volume circuit Windshield wiper switch adjusting ring changed from (+) side to (-) side 0 to 2.7 kΩ
      H75-12 (IG) - Body ground B - Body ground Power source circuit Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      H75-23 (WIG) - Body ground B - Body ground Power source circuit Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      H75-26 (E) - Body ground W-B - Body ground Body ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction in the wire harness.

    3. Reconnect the H75 windshield wiper relay assembly connector.

    4. Measure the voltage according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      H75-1 (+2S) - Body ground R - Body ground Front wiper low speed signal circuit Power switch on (IG), front wiper switch in low position 11 to 14 V
      Power switch on (IG), front wiper switch not in low position Below 1 V
      H75-2 (+1) - Body ground R - Body ground Front wiper motor low speed signal circuit Front wiper motor in low operation 11 to 14 V
      Front wiper motor off Below 1 V
      H75-3 (+2) - Body ground W - Body ground Front wiper motor high speed signal circuit Front wiper motor in high operation 11 to 14 V
      Front wiper motor off Below 1 V
      H75-4 (W) - Body ground B - Body ground Front washer motor circuit Front washer switch on Below 1 V
      Front washer switch off 11 to 14 V
      H75-8 (SIG) - Body ground R - Body ground Power source circuit Power switch on (IG) 7.5 to 8.5 V
      Power switch off Below 1 V
      H75-10 (+SM) - Body ground G - Body ground Front wiper motor operation signal Front wiper motor in low or high operation 11 to 14 V
      Front wiper motor off Below 1 V
      H75-11 (+SSW) - Body ground G - Body ground Front wiper motor operation signal Power switch on (IG), front wiper switch off or in AUTO, front wiper motor operates 11 to 14 V
      Front wiper motor off Below 1 V
      H75-14 (PA1) - Body ground LG - Body ground Rain sensor signal Power switch on (IG) Pulse generation
      H75-17 (C1) - H75-16 (CO) V - Y IG signal circuit Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      H75-19 (SPD) - Body ground V - Body ground Speed signal Power switch on (IG), wheel being rotated Pulse generation

      If the result is not as specified, the windshield wiper relay assembly may have a malfunction.

  2. CHECK HEADLIGHT CLEANER CONTROL RELAY

    A003XB9E10

    1. Disconnect the A43 headlight cleaner control relay connector.

    2. Measure the voltage and resistance according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A43-2 (H) - A43-4 (E) BR - W-B Headlight cleaner switch operation signal Power switch on (IG) and headlight cleaner switch off 11 to 14 V
      Power switch on (IG), light control switch in head position and headlight cleaner switch on Below 1 V
      A43-3 (IG) - A43-4 (E) B - W-B Power switch on (IG) signal (Power source circuit) Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      A43-4 (E) - Body ground W-B - Body ground Body ground Always Below 1 Ω
      A43-5 (FRWA) - A43-4 (E) R - W-B Front washer switch signal Power switch on (IG) and front washer switch off 11 to 14 V
      Power switch on (IG) and front washer switch on Below 1 V

      If the result is not as specified, there may be a malfunction in the wire harness.

  3. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    A003WXRE21

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      H17-20 (HDLO) - Body ground L - Body ground Low beam headlight signal Power switch on (IG), light control switch in head position Below 1 V
      Power switch on (IG), light control switch off 4.2 V or higher