WIPER AND WASHER SYSTEM > TERMINALS OF ECU

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CHECK WINDSHIELD WIPER RELAY ASSEMBLY

E125552E14

  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.


CHECK HEADLIGHT CLEANER CONTROL RELAY

E119074E10

  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
    A43-1 (HDLO) - A43-4 (E)
    		L - W-B
    		Low beam headlight signal
    		Light control switch in head position
    		Below 1 V
    Light control switch off
    		11 to 14 V
    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.