LIN COMMUNICATION SYSTEM TERMINALS OF ECU

  1. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    1. Disconnect the MB main body ECU (multiplex network body ECU) connector.

      B332798C01

      *A

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

      -

      -

      *1

      Main Body ECU (Multiplex Network Body ECU)

      -

      -

      *a

      1 Connector

      -

      -
      B332794C01

      *A

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

      -

      -

      *1

      Main Body ECU (Multiplex Network Body ECU)

      -

      -

      *a

      2 Connectors

      -

      -

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

      Tip:

      Measure the values on the wire harness side with the connectors disconnected.

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      MB-11 (GND1) - Body ground

      -

      Ground

      Always

      Below 1 Ω

      MB-30 (BECU) - Body ground

      -

      Battery power supply

      Always

      11 to 14 V

      MB-29 (ACC) - Body ground

      -

      ACC power supply

      Ignition switch ACC

      11 to 14 V

      MB-29 (ACC) - Body ground

      -

      ACC power supply

      Ignition switch off

      Below 1 V

      MB-32 (IG) - Body ground

      -

      Ignition switch power supply

      Ignition switch ON

      11 to 14 V

      MB-32 (IG) - Body ground

      -

      Ignition switch power supply

      Ignition switch off

      Below 1 V

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

    3. Reconnect the MB main body ECU (multiplex network body ECU) connector.

    4. Check for pulses according to the value(s) in the table below.

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      3C-22 (LIN2) - Body ground

      GR - Body ground

      LIN communication line

      Ignition switch ON

      Pulse generation

      3C-23 (LIN2) - Body ground*1

      V - Body ground

      LIN communication line

      Ignition switch ON

      Pulse generation

      3E-29 (LIN2) - Body ground*2

      V - Body ground

      LIN communication line

      Ignition switch ON

      Pulse generation

      3E-14 (LIN2) - Body ground*2

      V - Body ground

      LIN communication line

      Ignition switch ON

      Pulse generation

      • *1: for Models with Jam Protection Function on Driver Door Window Only

      • *2: for Models with Jam Protection Function on 4 Windows

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

  2. CHECK FRONT DOOR WINDOW REGULATOR ASSEMBLY (for Driver Door)

    1. Disconnect the H14*1 or G5*2 front door window regulator assembly (for driver door) connector.

      • *1: for LHD

      • *2: for RHD

      B286202C01

      *A

      for LHD

      *B

      for RHD

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

      Tip:

      Measure the values on the wire harness side with the connector disconnected.

      Table 1. for LHD

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      H14-2 (B) - Body ground

      GR - Body ground

      Battery power supply

      Always

      11 to 14 V

      H14-1 (GND) - Body ground

      W-B - Body ground

      Ground

      Always

      Below 1 Ω
      Table 2. for RHD

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      G5-2 (B) - Body ground

      GR - Body ground

      Battery power supply

      Always

      11 to 14 V

      G5-1 (GND) - Body ground

      W-B - Body ground

      Ground

      Always

      Below 1 Ω

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

    3. Reconnect the H14*1 or G5*2 front door window regulator assembly (for driver door) connector.

      • *1: for LHD

      • *2: for RHD

    4. Check for pulses according to the value(s) in the table below.

      Table 3. for LHD

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      H14-9 (LIN) - Body ground

      V - Body ground

      LIN communication line

      Ignition switch ON

      Pulse generation
      Table 4. for RHD

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      G5-9 (LIN) - Body ground

      V - Body ground

      LIN communication line

      Ignition switch ON

      Pulse generation

      If the result is not as specified, the front door window regulator assembly (for driver door) may be malfunctioning.

  3. CHECK FRONT DOOR WINDOW REGULATOR ASSEMBLY (for Front Passenger Door) (for Models with Jam Protection Function on 4 Windows)

    1. Disconnect the G13*1 or H4*2 front door window regulator assembly (for front passenger door) connector.

      • *1: for LHD

      • *2: for RHD

      B286202C02

      *A

      for LHD

      *B

      for RHD

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

      Tip:

      Measure the values on the wire harness side with the connector disconnected.

      Table 5. for LHD

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      G13-2 (B) - Body ground

      GR - Body ground

      Battery power supply

      Always

      11 to 14 V

      G13-1 (GND) - Body ground

      W-B - Body ground

      Ground

      Always

      Below 1 Ω
      Table 6. for RHD

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      H4-2 (B) - Body ground

      GR - Body ground

      Battery power supply

      Always

      11 to 14 V

      H4-1 (GND) - Body ground

      W-B - Body ground

      Ground

      Always

      Below 1 Ω

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

    3. Reconnect the G13*1 or H4*2 front door window regulator assembly (for front passenger door) connector.

      • *1: for LHD

      • *2: for RHD

    4. Check for pulses according to the value(s) in the table below.

      Table 7. for LHD

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      G13-9 (LIN) - Body ground

      GR - Body ground

      LIN communication line

      Ignition switch ON

      Pulse generation
      Table 8. for RHD

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      H4-9 (LIN) - Body ground

      GR - Body ground

      LIN communication line

      Ignition switch ON

      Pulse generation

      If the result is not as specified, the front door window regulator assembly (for front passenger door) may be malfunctioning.

  4. CHECK REAR DOOR WINDOW REGULATOR ASSEMBLY (for RH Door) (for Models with Jam Protection Function on 4 Windows)

    1. Disconnect the J3 rear door window regulator assembly (for RH door) connector.

      B203471N01

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

      Tip:

      Measure the values on the wire harness side with the connector disconnected.

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      J3-2 (B) - Body ground

      LA-L - Body ground

      Battery power supply

      Always

      11 to 14 V

      J3-1 (GND) - Body ground

      W-B - Body ground

      Ground

      Always

      Below 1 Ω

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

    3. Reconnect the J3 rear door window regulator assembly (for RH door) connector.

    4. Check for pulses according to the value(s) in the table below.

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      J3-9 (LIN) - Body ground

      V - Body ground

      LIN communication line

      Ignition switch ON

      Pulse generation

      If the result is not as specified, the rear door window regulator assembly (for RH door) may be malfunctioning.

  5. CHECK REAR DOOR WINDOW REGULATOR ASSEMBLY (for LH Door) (for Models with Jam Protection Function on 4 Windows)

    1. Disconnect the K3 rear door window regulator assembly (for LH door) connector.

      B203471N02

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

      Tip:

      Measure the values on the wire harness side with the connector disconnected.

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      K3-2 (B) - Body ground

      LA-P - Body ground

      Battery power supply

      Always

      11 to 14 V

      K3-1 (GND) - Body ground

      W-B - Body ground

      Ground

      Always

      Below 1 Ω

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

    3. Reconnect the K3 rear door window regulator assembly (for LH door) connector.

    4. Check for pulses according to the value(s) in the table below.

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      K3-9 (LIN) - Body ground

      V - Body ground

      LIN communication line

      Ignition switch ON

      Pulse generation

      If the result is not as specified, the rear door window regulator assembly (for LH door) may be malfunctioning.

  6. CHECK POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY (for Models with Jam Protection Function on 4 Windows)

    1. Disconnect the H12*1 or G3*2 power window regulator master switch assembly connector.

      • *1: for LHD

      • *2: for RHD

      B131578C01

      *A

      for LHD

      *B

      for RHD

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

      Tip:

      Measure the values on the wire harness side with the connector disconnected.

      Table 9. for LHD

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      H12-11 (B) - Body ground

      W - Body ground

      Battery power supply

      Always

      11 to 14 V

      H12-12 (GND) - Body ground

      W-B - Body ground

      Ground

      Always

      Below 1 Ω
      Table 10. for RHD

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      G3-11 (B) - Body ground

      W - Body ground

      Battery power supply

      Always

      11 to 14 V

      G3-12 (GND) - Body ground

      W-B - Body ground

      Ground

      Always

      Below 1 Ω

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

    3. Reconnect the H12*1 or G3*2 power window regulator master switch assembly connector.

      • *1: for LHD

      • *2: for RHD

    4. Check for pulses according to the value(s) in the table below.

      Table 11. for LHD

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      H12-17 (LIN1) - Body ground

      GR - Body ground

      LIN communication line

      Ignition switch ON

      Pulse generation

      H12-16 (LIN2) - Body ground

      V - Body ground

      LIN communication line

      Ignition switch ON

      Pulse generation
      Table 12. for RHD

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      G3-17 (LIN1) - Body ground

      GR - Body ground

      LIN communication line

      Ignition switch ON

      Pulse generation

      G3-16 (LIN2) - Body ground

      V - Body ground

      LIN communication line

      Ignition switch ON

      Pulse generation

      If the result is not as specified, the power window regulator master switch assembly may be malfunctioning.

  7. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (w/ Entry and Start System)

    1. Disconnect the E33 and E34 certification ECU (smart key ECU assembly) connector.

      B264892N38

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

      Tip:

      Measure the values on the wire harness side with the connector disconnected.

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      E33-11 (E) - Body ground

      W-B - Body ground

      Ground

      Always

      Below 1 Ω

      E33-2 (+B) - Body ground

      L - Body ground

      +B power supply

      Always

      11 to 14 V

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

    3. Reconnect the E33 and E34 certification ECU (smart key ECU assembly) connector.

    4. Check for pulses according to the value(s) in the table below.

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      E35-17 (LIN) - Body ground

      V - Body ground

      LIN communication line

      Ignition switch ON

      Pulse generation

      If the result is not as specified, the certification ECU (smart key ECU assembly) may be malfunctioning.

  8. CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) (w/ Entry and Start System)

    1. Disconnect the E37 steering lock ECU (steering lock actuator assembly) connector.

      B118684N26

    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

      E37-1 (GND) - Body ground

      W-B Body ground

      Ground

      Always

      Below 1 Ω

      E37-7 (B) - Body ground

      L - Body ground

      Battery power supply

      Always

      11 to 14 V

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

    3. Reconnect the E37 steering lock ECU (steering lock actuator assembly) connector.

    4. Check for pulses according to the value(s) in the table below.

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      E37-5 (LIN) - Body ground

      V - Body ground

      LIN communication line

      Ignition switch ON

      Pulse generation

      If the result is not as specified, the steering lock ECU (steering lock actuator assembly) may be malfunctioning.

  9. CHECK ID CODE BOX (IMMOBILISER CODE ECU) (w/ Entry and Start System)

    1. Disconnect the E87 ID code box (immobiliser code ECU) connector.

      B278917N10

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

      Tip:

      Measure the values on the wire harness side with the connector disconnected.

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      E87-5 (GND) - Body ground

      BR - Body ground

      Ground

      Always

      Below 1 Ω

      E87-1 (+B) - Body ground

      W - Body ground

      +B power supply

      Always

      11 to 14 V

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

    3. Reconnect the E87 ID code box (immobiliser code ECU) connector.

    4. Check for pulses according to the value(s) in the table below.

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      E87-2 (LIN) - Body ground

      V - Body ground

      LIN communication line

      Ignition switch ON

      Pulse generation

      If the result is not as specified, the ID code box (immobiliser code ECU) may be malfunctioning.

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

    1. Disconnect the E107 double lock door control relay assembly connector.

      B336508N01

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

      Tip:

      Measure the values on the wire harness side with the connector disconnected.

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      E107-1 (+B) - Body ground

      B - Body ground

      Battery power supply

      Always

      11 to 14 V

      E107-7 (CPUB) - Body ground

      LG - Body ground

      Battery power supply

      Always

      11 to 14 V

      E107-14 (GND) - Body ground

      W-B - Body ground

      Ground

      Always

      Below 1 Ω

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

    3. Reconnect the E107 double lock door control relay assembly connector.

    4. Check for pulses according to the value(s) in the table below.

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      E107-9 (MPX1) - Body ground

      GR - Body ground

      LIN communication line

      Double lock unset

      Pulse generation

      If the result is not as specified, the double lock door control relay assembly may be malfunctioning.

  11. CHECK ROOF SUNSHADE ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY) (w/ Roof Sunshade System)

    1. Disconnect the a1 roof sunshade ECU (sliding roof drive gear assembly) connector.

      B270994N07

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

      Tip:

      Measure the values on the wire harness side with the connector disconnected.

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      a1-8 (B) - Body ground

      R-W - Body ground

      Battery power supply

      Always

      11 to 14 V

      a1-12 (E) - Body ground

      B-W - Body ground

      Ground

      Always

      Below 1 Ω

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

    3. Reconnect the a1 roof sunshade ECU (sliding roof drive gear assembly) connector.

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

      Tester Connection

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      a1-11 (LIN) - Body ground

      B - Body ground

      LIN communication line

      Ignition switch ON

      Pulse generation

      If the result is not as specified, the roof sunshade ECU (sliding roof drive gear assembly) may be malfunctioning.