WIPER AND WASHER SYSTEM TERMINALS OF ECU


  1. CHECK WINDSHIELD WIPER RELAY ASSEMBLY

    A003M90N11

    1. Disconnect the I46 windshield wiper relay assembly connector.


      1. Measure the voltage and resistance on the wire harness side connector according to the value(s) in the table below.

        Terminal No.

        (Symbol)

        		 Wiring Color Terminal Description Condition Specified Condition
        I46-2 (IG) - Body ground W - Body ground Power switch on (IG) signal (Power source circuit) Power switch on (IG) 11 to 14 V
        Power switch off Below 1 V
        I46-8 (VR2) - I46-21 (VR1) L - GR Adjusting volume signal Windshield wiper switch adjusting ring*A changed 0 to 231 Ω
        I46-12 (E) - Body ground W-B - Body ground Body ground Always Below 1 Ω
        I46-16 (WIG) - Body ground

        B - Body ground*1

        G - Body ground*2

        		 Power source signal Power switch on (IG) 11 to 14 V
        Power switch off Below 1 V
        I46-25 (W) - Body ground B - Body ground Front washer switch signal Front washer switch on Below 1 Ω
        Front washer switch off 10 kΩ or higher

        • *1: for LHD

        • *2: for RHD

        Tech Tips

        *A: The rain sensor sensitivity can be adjusted by the windshield wiper switch adjusting ring.

    2. Connect the I46 windshield wiper relay assembly connector.


      1. Measure the voltage and resistance and check for pulses according to the value(s) in the table below.

        Terminal No.

        (Symbol)

        		 Wiring Color Terminal Description Condition Specified Condition
        I46-1 (+SM) - Body ground G - Body ground Front wiper motor position detection signal Front wiper motor in low or high operation Below 1 V ←→ 11 to 14V
        Front wiper motor off Below 1 V
        I46-3 (C1) - I46-5 (CO) V - B Front wiper switch AUTO signal Power switch on (IG), front wiper switch in AUTO Below 1 V
        Power switch on (IG), front wiper switch off 11 to 14 V
        I46-10 (+1) - Body ground G - Body ground Front wiper motor low speed signal Front wiper motor in low operation 11 to 14 V
        Front wiper motor off Below 1 Ω
        I46-11 (+2) - Body ground SB - Body ground Front wiper motor high speed signal Front wiper motor in high operation 11 to 14 V
        Front wiper motor off Below 1 V
        I46-14 (MPX1) - Body ground LG - Body ground Rain sensor signal Power switch on (IG) Pulse generation
        I46-25 (W) - Body ground B - Body ground Front washer switch signal Power switch on (IG), front washer switch on Below 1 V
        Power switch on (IG), front washer switch off 11 to 14 V