WIPER AND WASHER SYSTEM TERMINALS OF ECU


  1. CHECK WINDSHIELD WIPER RELAY ASSEMBLY

    A00401RE18

    1. Disconnect the L63 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
      L63-4 (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
      L63-6 (VR2) - L63-7 (VR1) W - G Adjusting volume circuit Windshield wiper switch adjusting ring changed from (+) side to (-) side 0 to 2.7 kΩ
      L63-8 (SIG) - Body ground BE - Body ground Power source circuit Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      L63-12 (IG) - Body ground B - Body ground Power source circuit Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      L63-23 (WIG) - Body ground B - Body ground Power source circuit Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      L63-26 (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 L63 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
      L63-1 (+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
      L63-2 (+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
      L63-3 (+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
      L63-4 (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
      L63-10 (+SM) - Body ground G - Body ground Front wiper motor operation signal Front wiper motor is in low or high operation 11 to 14 V
      Front wiper motor off Below 1 V
      L63-11 (+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
      L63-14 (PA1) - Body ground Y - Body ground Rain sensor signal Power switch on (IG) Pulse generation
      L63-17 (C1) - L63-16 (CO) V - Y IG signal circuit Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      L63-19 (SPD) - Body ground W - Body ground Speed signal Driving at approx. 20 km/h (12 mph) Pulse generation

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

  2. CHECK HEADLIGHT CLEANER CONTROL RELAY


    1. Disconnect the A45 headlight cleaner control relay connector.

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

      A0041GQE14
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A45-2 (H) - A45-4 (E) LG - W-B Headlight cleaner switch operation signal Headlight cleaner switch off 11 to 14 V
      Headlight cleaner switch on Below 1 V
      A45-3 (IG) - A45-4 (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
      A45-4 (E) - Body ground W-B - Body ground Body ground Always Below 1 Ω
      A45-5 (FRWA) - A45-4 (E) R - W-B Front washer switch signal Front washer switch off 11 to 14 V
      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)

    A004118E31
    Text in Illustration
    *A for LHD *B for RHD

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      2C-35 - 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