WIPER AND WASHER SYSTEM TERMINALS OF ECU


  1. CHECK WINDSHIELD WIPER RELAY ASSEMBLY (w/ Auto Wiper System)

    A01RK3RN08

    1. Disconnect the F43 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
        F43-2 (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
        F43-25 (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
        F43-8 (VR2) - F43-21 (VR1) L - GR Adjusting volume signal Windshield wiper switch adjusting ring* changed 0 to 231 Ω
        F43-12 (E) - Body ground W-B - Body ground Body ground Always Below 1 Ω
        F43-16 (WIG) - Body ground B - Body ground Power source signal Power switch on (IG) 11 to 14 V
        Power switch off Below 1 V

        Tech Tips

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

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

    2. Reconnect the F43 windshield wiper relay assembly connector.


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

        Terminal No.

        (Symbol)

        		 Wiring Color Terminal Description Condition Specified Condition
        F43-10 (+1) - Body ground G - Body ground Front wiper motor low speed signal Front wiper motor off Below 1 Ω

        Tech Tips

        If the result is not as specified, the windshield wiper relay assembly may be malfunctioning.

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

        Terminal No.

        (Symbol)

        		 Wiring Color Terminal Description Condition Specified Condition
        F43-1 (+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
        F43-3 (C1) - F43-5 (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
        F43-25 (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
        F43-10 (+1) - Body ground G - Body ground Front wiper motor low speed signal Front wiper motor in low operation 11 to 14 V
        F43-11 (+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
        F43-14 (MPX1) - Body ground LG - Body ground Rain sensor signal Power switch on (IG) Pulse generation

        Tech Tips

        If the result is not as specified, the windshield wiper relay assembly may be malfunctioning.