LIN COMMUNICATION SYSTEM TERMINALS OF ECU


  1. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)


    1. Remove the main body ECU (multiplex network body ECU).

      Click here

      B000YCPC11
      *1 Main Body ECU (Multiplex Network Body ECU) - -

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      A-11 (GND1) - Body ground - Ground Always Below 1 Ω
      A-31 (BECU) - Body ground - Battery power supply Always 11 to 14 V
      A-30 (ACC) - Body ground - ACC power supply Engine switch on (ACC) 11 to 14 V
      Engine switch off Below 1 V
      A-32 (IG) - Body ground - IG power supply Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V

    3. Install the main body ECU (multiplex network body ECU).

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    4. Measure the pulse according to the value(s) in the table below.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      A-16 (LIN2) - Body ground - LIN communication line Engine switch on (IG) Pulse generation

  2. CHECK FRONT MULTIPLEX NETWORK DOOR ECU LH

    B000XU3E03

    1. Disconnect the S9 front multiplex network door ECU LH connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      S9-3 (SIG) - Body ground LA-B - Body ground IG power supply Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      S9-4 (CPUB) - Body ground LA-LG - Body ground Battery power supply Always 11 to 14 V
      S9-6 (BDR) - Body ground R - Body ground Battery power supply Always 11 to 14 V
      S9-16 (BCUT) - Body ground V - Body ground Battery power supply Always 11 to 14 V
      S9-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

    3. Measure the pulse according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      S9-11 (LIN1) - Body ground SB - Body ground LIN communication line Engine switch on (IG) Pulse generation
      S9-13 (LIN3) - Body ground W - Body ground LIN communication line Engine switch on (IG) Pulse generation

  3. CHECK FRONT MULTIPLEX NETWORK DOOR ECU RH

    B000XU3E04

    1. Disconnect the R9 front multiplex network door ECU RH connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      R9-3 (SIG) - Body ground LA-B - Body ground IG power supply Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      R9-4 (CPUB) - Body ground LA-LG - Body ground Battery power supply Always 11 to 14 V
      R9-6 (BDR) - Body ground R - Body ground Battery power supply Always 11 to 14 V
      R9-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

    3. Measure the pulse according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      R9-11 (LIN1) - Body ground SB - Body ground LIN communication line Engine switch on (IG) Pulse generation
      R9-13 (LIN3) - Body ground W - Body ground LIN communication line Engine switch on (IG) Pulse generation

  4. CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

    B000UPBC02
    *A for LHD
    *B for RHD

    1. Disconnect the U2*1 or T2*2 multiplex network master switch assembly connector.


      • *1: for LHD

      • *2: for RHD

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

      for LHD
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      U2-11 (B) - Body ground LA-GR - Body ground Battery power supply Always 11 to 14 V
      U2-12 (GND) - Body ground LA-R - Body ground Ground Always Below 1 Ω
      for RHD
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      T2-11 (B) - Body ground LA-GR - Body ground Battery power supply Always 11 to 14 V
      T2-12 (GND) - Body ground LA-R - Body ground Ground Always Below 1 Ω

    3. Measure the pulse according to the value(s) in the table below.

      for LHD
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      U2-17 (LIN1) - Body ground SB - Body ground LIN communication line Engine switch on (IG) Pulse generation
      for RHD
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      T2-17 (LIN1) - Body ground LG - Body ground LIN communication line Engine switch on (IG) Pulse generation

  5. CHECK FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH

    B000WAZE01

    1. Disconnect the S2 front power window regulator motor assembly LH connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      S2-1 (GND) - Body ground B - Body ground Ground Always Below 1 Ω
      S2-2 (B) - Body ground L - Body ground Battery power supply Always 11 to 14 V

    3. Measure the pulse according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      S2-9 (LIN) - Body ground W - Body ground LIN communication line Engine switch on (IG) Pulse generation

  6. CHECK FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH

    B000WAZE02

    1. Disconnect the R2 front power window regulator motor assembly RH connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      R2-1 (GND) - Body ground B - Body ground Ground Always Below 1 Ω
      R2-2 (B) - Body ground L - Body ground Battery power supply Always 11 to 14 V

    3. Measure the pulse according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      R2-9 (LIN) - Body ground W - Body ground LIN communication line Engine switch on (IG) Pulse generation

  7. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    B000X71E01

    1. Disconnect the P66 certification ECU (smart key ECU assembly) connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      P66-4 (+B) - Body ground W - Body ground Battery power supply Always 11 to 14 V
      P66-18 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω

    3. Measure the pulse according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      P66-13 (LIN) - Body ground G - Body ground LIN communication line Engine switch on (IG) Pulse generation

  8. CHECK STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY

    B000Y47E05

    1. Disconnect the P14 steering lock actuator or upper bracket assembly connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      P14-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      P14-6 (IG2) - Body ground R - Body ground IG power supply Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      P14-7 (B) - Body ground V - Body ground Battery power supply Always 11 to 14 V

    3. Measure the pulse according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      P14-5 (LIN) - Body ground V - Body ground LIN communication line Engine switch on (IG) Pulse generation

  9. CHECK ID CODE BOX (IMMOBILISER CODE ECU)

    B000YUDE01

    1. Disconnect the P51 ID code box (immobiliser code ECU) connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      P51-1 (+B) - Body ground GR - Body ground Battery power supply Always 11 to 14 V
      P51-5 (GND) - Body ground BR - Body ground Ground Always Below 1 Ω

    3. Measure the pulse according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      P51-2 (LIN1) - Body ground L - Body ground LIN communication line Engine switch on (IG) Pulse generation

  10. CHECK DOUBLE LOCK DOOR RELAY ASSEMBLY (w/Double Locking System)

    B000WQ1E01

    1. Disconnect the P83 double lock door control relay assembly connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      P83-11 (CPUB) - Body ground LA-W - Body ground Battery power supply Always 11 to 14 V
      P83 -12 (+B) - Body ground LA-B - Body ground Battery power supply Always 11 to 14 V
      P83-7 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

    3. Measure the pulse according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      P83-9 (LIN) - Body ground LA-BE - Body ground LIN communication line Engine switch on (IG) Pulse generation