WIPER AND WASHER SYSTEM TERMINALS OF ECU

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

    E257545N01

    1. Disconnect the E95 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

        E95-2 (IG) - Body ground

        L - Body ground

        Ignition switch ON signal (Power source circuit)

        Ignition switch ON

        11 to 14 V

        Ignition switch off

        Below 1 V

        E95-8 (VR2) - E95-21(VR1)

        B - P

        Adjusting volume circuit

        Windshield wiper switch adjusting ring* changed

        0 to 231 Ω

        E95-12 (E) - Body ground

        BR - Body ground

        Body ground

        Always

        Below 1 Ω

        E95-16 (WIG) - Body ground

        B - Body ground

        Signal power source circuit

        Ignition switch ON

        11 to 14 V

        Ignition switch off

        Below 1 V

        E95-25 (W) - Body ground

        W - Body ground

        Front washer switch circuit

        Front washer switch on

        Below 1 Ω

        Front washer switch off

        10 kΩ or higher
        Tip:

        *: 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 E95 windshield wiper relay assembly connector.

      1. 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

        E95-1 (+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

        E95-3 (C1) - E95-5 (C0)

        L - R

        Front wiper switch AUTO signal circuit

        Ignition switch ON, front wiper switch in AUTO

        Below 1 V

        Ignition switch ON, front wiper switch off

        11 to 14 V

        E95-4 (W) - Body ground

        W - Body ground

        Front washer switch circuit

        Ignition switch ON, front washer switch on

        Below 1 V

        Ignition switch ON, front washer switch off

        11 to 14 V

        E95-10 (+1) - Body ground

        G - 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 Ω

        E95-11 (+2) - Body ground

        R - 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

        E95-14 (MPX1) - Body ground

        GR - Body ground

        Rain sensor signal

        Ignition switch ON

        Pulse generation

        E95-24 (SPD) - Body ground

        V - Body ground

        Speed signal

        Ignition switch ON, wheel being rotated

        Pulse generation

        (See waveform 1)
        Tip:

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

      2. E257546N02

        Waveform 1 (Reference):

        Item

        Condition

        Tool setting

        5 V/DIV., 20 ms./DIV.

        Vehicle condition

        Wheel being rotated
        Tip:

        When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.

  2. CHECK HEADLIGHT CLEANER CONTROL RELAY

    E257547N01

    1. Disconnect the A94 headlight cleaner control relay 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

        A94-3 (IG) - A94-4 (E)

        L - W-B

        Ignition switch ON signal (Power source circuit)

        Ignition switch ON

        11 to 14 V

        Ignition switch off

        Below 1 V

        A94-4 (E) - Body ground

        W-B - Body ground

        Body ground

        Always

        Below 1 Ω

        A94-5 (FRWA) - A94-4 (E)

        W - W-B

        Front washer switch signal

        Ignition switch ON, front washer switch on

        11 to 14 V

        Ignition switch ON, front washer switch on

        Below 1 V

        A94-6 (PB) - A94-4 (E)

        W - W-B

        Headlight clear motor operation signal

        Ignition switch off

        11 to 14 V
        Tip:

        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)

    B332798C08

    *A

    Main Body ECU (Multiplex Network Body ECU) with 1 Connector

    -

    -

    *1

    Main Body ECU (Multiplex Network Body ECU)

    -

    -

    *a

    1 connector

    -

    -
    B332794C07

    *A

    Main Body ECU (Multiplex Network Body ECU) with 2 Connectors

    -

    -

    *1

    Main Body ECU (Multiplex Network Body ECU)

    -

    -

    *a

    2 connectors

    -

    -
    B332799C05

    *A

    Main Body ECU (Multiplex Network Body ECU) with 3 Connectors

    -

    -

    *1

    Main Body ECU (Multiplex Network Body ECU)

    -

    -

    *a

    3 connectors

    -

    -

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

      Terminal No. (Symbol)

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      3A-35 - Body ground

      V - Body ground

      Low beam headlight signal

      Light control switch in head position

      Below 1 V

      Light control switch off

      4.2 V or higher

      If the result is not as specified, the main body ECU (multiplex network body ECU) or instrument panel junction block assembly may be malfunctioning.