LIN COMMUNICATION SYSTEM TERMINALS OF ECU


  1. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)


    1. Disconnect the 3D and 3B instrument panel junction block assembly connectors.

      A01EWY1E25
      Text in Illustration
      *A for LHD *B for RHD

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

      Tech Tips

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      3D-31 (BECU) - Body ground V - Body ground Battery power supply Always 11 to 14 V
      3B-7 (GND1) - 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 3C and 3B instrument panel junction block assembly connectors.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      3C-26 (LIN2) - 3B-7 (GND1) P - W-B LIN communication line Ignition switch ON Pulse generation
      3B-30 (LIN2) - 3B-7 (GND1) P - W-B LIN communication line Ignition switch ON Pulse generation

      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 POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Door)


    1. Disconnect the K9*1 or J9*2 power window regulator motor assembly (for driver door) connector.


      • *1: for LHD

      • *2: for RHD

      A01EZ2NE01
      Text in Illustration
      *A for LHD *B for RHD

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

      Tech Tips

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

      for LHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      K9-2 (B) - K9-1 (GND) GR - W-B Battery power supply Always 11 to 14 V
      K9-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      for RHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      J9-2 (B) - J9-1 (GND) GR - W-B Battery power supply Always 11 to 14 V
      J9-1 (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 K9*1 or J9*2 power window regulator motor assembly (for driver door) connector.


      • *1: for LHD

      • *2: for RHD

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

      for LHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      K9-9 (LIN) - K9-1 (GND) P - W-B LIN communication line Ignition switch ON Pulse generation
      for RHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      J9-9 (LIN) - J9-1 (GND) L - W-B LIN communication line Ignition switch ON Pulse generation

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

  3. CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Front Passenger Door)


    1. Disconnect the J9*1 or K9*2 power window regulator motor assembly (for front passenger door) connector.


      • *1: for LHD

      • *2: for RHD

      A01EZ2NE02
      Text in Illustration
      *A for LHD *B for RHD

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

      Tech Tips

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

      for LHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      J9-2 (B) - J9-1 (GND) GR - W-B Battery power supply Always 11 to 14 V
      J9-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      for RHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      K9-2 (B) - K9-1 (GND) GR - W-B Battery power supply Always 11 to 14 V
      K9-1 (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 J9*1 or K9*2 power window regulator motor 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.

      for LHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      J9-9 (LIN) - J9-1 (GND) P - W-B LIN communication line Ignition switch ON Pulse generation
      for RHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      K9-9 (LIN) - K9-1 (GND) P - W-B LIN communication line Ignition switch ON Pulse generation

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

  4. CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear RH Door)


    1. Disconnect the L2 power window regulator motor assembly (for rear RH door) connector.

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

      Tech Tips

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      L2-2 (B) - L2-1 (GND) G - W-B Battery power supply Always 11 to 14 V
      L2-1 (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 L2 power window regulator motor assembly (for rear 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
      L2-9 (LIN) - L2-1 (GND) P - W-B LIN communication line Ignition switch ON Pulse generation

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

  5. CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear LH Door)


    1. Disconnect the M2 power window regulator motor assembly (for rear LH door) connector.

      A01EYY5E95

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

      Tech Tips

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      M2-2 (B) - M2-1 (GND) G - W-B Battery power supply Always 11 to 14 V
      M2-1 (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 M2 power window regulator motor assembly (for rear 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
      M2-9 (LIN) - M2-1 (GND) P - W-B LIN communication line Ignition switch ON Pulse generation

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

  6. CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY


    1. Disconnect the K3*1 or J3*2 multiplex network master switch assembly connector.


      • *1: for LHD

      • *2: for RHD

      A01EW23E27
      Text in Illustration
      *A for LHD *B for RHD

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

      Tech Tips

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

      for LHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      K3-11 (B) - K3-12 (GND) W - BR Battery power supply Always 11 to 14 V
      K3-12 (GND) - Body ground BR - Body ground Ground Always Below 1 Ω
      for RHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      J3-11 (B) - J3-12 (GND) W - BR Battery power supply Always 11 to 14 V
      J3-12 (GND) - Body ground BR - 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*1 or J3*2 multiplex network master switch assembly connector.


      • *1: for LHD

      • *2: for RHD

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

      for LHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      K3-17 (LIN1) - K3-12 (GND) P - BR LIN communication line Ignition switch ON Pulse generation
      for RHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      J3-17 (LIN1) - J3-12 (GND) P - BR LIN communication line Ignition switch ON Pulse generation

      If the result is not as specified, the multiplex network master switch assembly may be malfunctioning.

  7. CHECK SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) (w/ Sliding Roof System)


    1. Disconnect the S4 sliding roof ECU (sliding roof drive gear sub-assembly) connector.

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

      Tech Tips

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      S4-8 (B) - S4-12 (E) B - W-B Battery power supply Always 11 to 14 V
      S4-12 (E) - 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 S4 sliding roof ECU (sliding roof drive gear sub-assembly) connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      S4-11 (MPX1) - S4-12 (E) P - W-B LIN communication line Ignition switch ON Pulse generation

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

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


    1. Disconnect the A43 certification ECU (smart key ECU assembly) connector.

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

      Tech Tips

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      A43-2 (+B) - A43-11 (E) W - W Battery power supply Always 11 to 14 V
      A43-11 (E) - Body ground 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 A43 or I78 certification ECU (smart key ECU assembly) connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      I78-5 (IG) - A43-11 (E) LG - W IG power supply Ignition switch ON 11 to 14 V
      I78-5 (IG) - A43-11 (E) LG - W IG power supply Ignition switch off Below 1 V
      I78-17 (LIN) - A43-11 (E) Y*1 - W LIN communication line Ignition switch ON Pulse generation
      V*2 - W 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.


      • *1: w/o Wireless Door Lock Buzzer Answer Back Function

      • *2: w/ Wireless Door Lock Buzzer Answer Back Function

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


    1. A01EX98E12

      Disconnect the I24 steering lock ECU (steering lock actuator 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
      I24-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      I24-7 (B) - Body ground B - Body ground Battery power supply Always 11 to 14 V
      I24-6 (IG2) - Body ground LG - Body ground IG power supply Ignition switch ON 11 to 14 V

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

    3. Reconnect the I24 steering lock ECU (steering lock actuator assembly) connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      I24-5 (LIN) - I24-1 (GND) Y*1 - W-B LIN communication line Ignition switch ON Pulse generation
      V*2 - W-B 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.


      • *1: w/o Wireless Door Lock Buzzer Answer Back Function

      • *2: w/ Wireless Door Lock Buzzer Answer Back Function

  10. CHECK ID CODE BOX (IMMOBILISER CODE ECU) (w/ Wireless Door Lock Buzzer Answer Back Function and w/ Smart Entry and Start System)


    1. Disconnect the I20 ID code box (immobiliser code ECU) connector.

      A01EY8HE02

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

      Tech Tips

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      I20-1 (+B) - I20-5 (GND) W - W-B Battery power supply Always 11 to 14 V
      I20-5 (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 I20 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
      I20-2 (LIN1) - I20-5 (GND) Y - W-B 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.