LIN COMMUNICATION SYSTEM TERMINALS OF ECU


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


    1. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

    2. Disconnect the H9 main body ECU (multiplex network body ECU) and 3B instrument panel junction block assembly connectors.

      A00073VE03

    3. 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
      MB-30 (BECU) - Body ground - Auxiliary battery power supply Power switch off 11 to 14 V
      3B-7 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      H9-3 (GND2) - 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.

    4. Reinstall the main body ECU (multiplex network body ECU) to instrument panel junction block assembly.

    5. Reconnect the H9 main body ECU (multiplex network body ECU) and 3B instrument panel junction block assembly connectors.

    6. 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 Power switch on (IG) Pulse generation
      3B-30 (LIN2) - 3B-7 (GND1) P - W-B LIN communication line Power switch on (IG) 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 M8*1 or L9*2 power window regulator motor assembly (for driver door) connector.


      • *1: for LHD

      • *2: for RHD

      A00040ME02
      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
      M8-2 (B) - M8-1 (GND) GR - W-B Auxiliary battery power supply Power switch off 11 to 14 V
      M8-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      for RHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      L9-2 (B) - L9-1 (GND) GR - W-B Auxiliary battery power supply Power switch off 11 to 14 V
      L9-1 (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 M8*1 or L9*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
      M8-9 (LIN) - M8-1 (GND) L - W-B LIN communication line Power switch on (IG) Pulse generation
      for RHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      L9-9 (LIN) - L9-1 (GND) L - W-B LIN communication line Power switch on (IG) 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 L9*1 or M8*2 power window regulator motor assembly (for front passenger door) connector.


      • *1: for LHD

      • *2: for RHD

      A0007VJE02
      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
      L9-2 (B) - L9-1 (GND) GR - W-B Auxiliary battery power supply Power switch off 11 to 14 V
      L9-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      for RHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      M8-2 (B) - M8-1 (GND) GR - W-B Auxiliary battery power supply Power switch off 11 to 14 V
      M8-1 (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 L9*1 or M8*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
      L9-9 (LIN) - L9-1 (GND) P - W-B LIN communication line Power switch on (IG) Pulse generation
      for RHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      M8-9 (LIN) - M8-1 (GND) P - W-B LIN communication line Power switch on (IG) 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 N2 power window regulator motor assembly (for rear RH door) connector.

      A0006C7E02

    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
      N2-2 (B) - N2-1 (GND) R - W-B Auxiliary battery power supply Power switch off 11 to 14 V
      N2-1 (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 N2 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
      N2-9 (LIN) - N2-1 (GND) P - W-B LIN communication line Power switch on (IG) 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 O2 power window regulator motor assembly (for rear LH door) connector.

      A00067JE02

    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
      O2-2 (B) - O2-1 (GND) G - W-B Auxiliary battery power supply Power switch off 11 to 14 V
      O2-1 (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 O2 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
      O2-9 (LIN) - O2-1 (GND) P - W-B LIN communication line Power switch on (IG) 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 M4*1 or L13*2 multiplex network master switch assembly connector.


      • *1: for LHD

      • *2: for RHD

      A00060JE02
      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
      M4-11 (B) - M4-12 (GND) W - BR Auxiliary battery power supply Power switch off 11 to 14 V
      M4-12 (GND) - Body ground BR - Body ground Ground Always Below 1 Ω
      for RHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      L13-11 (B) - L13-12 (GND) W - BR Auxiliary battery power supply Power switch off 11 to 14 V
      L13-12 (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 M4*1 or L13*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
      M4-17 (LIN1) - M4-12 (GND) P - BR LIN communication line Power switch on (IG) Pulse generation
      M4-16 (LIN2) - M4-12 (GND) L - BR LIN communication line Power switch on (IG) Pulse generation
      for RHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      L13-17 (LIN1) - L13-12 (GND) P - BR LIN communication line Power switch on (IG) Pulse generation
      L13-16 (LIN2) - L13-12 (GND) L - BR LIN communication line Power switch on (IG) 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)


    1. Disconnect the T4 sliding roof ECU (sliding roof drive gear sub-assembly) connector.

      A0004BGE02

    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
      T4-8 (B) - T4-12 (E) B - W-B Auxiliary battery power supply Power switch off 11 to 14 V
      T4-12 (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 T4 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
      T4-11 (MPX1) - T4-12 (E) P - W-B LIN communication line Power switch on (IG) 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)


    1. Disconnect the H57 and H58 certification ECU (smart key ECU assembly) connectors.

      A0006VLE02

    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
      H58-2 (+B) - H57-11 (E) R - W-B Auxiliary battery power supply Power switch off 11 to 14 V
      H57-11 (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 H57 and H58 certification ECU (smart key ECU assembly) connectors.

    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
      H58-5 (IG) - H57-11 (E) LG - W-B IG power supply Power switch on (IG) 11 to 14 V
      H58-5 (IG) - H57-11 (E) LG - W-B IG power supply Power switch off Below 1 V
      H58-17 (LIN) - H57-11 (E) B - W-B LIN communication line Power switch on (IG) Pulse generation

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

  9. CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY)


    1. Disconnect the H18 steering lock ECU (steering lock actuator assembly) connector.

      A0004ABE02

    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
      H18-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      H18-7 (B) - Body ground B - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      H18-6 (IG2) - Body ground LG - Body ground IG power supply Power switch on (IG) 11 to 14 V

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

    3. Reconnect the H18 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
      H18-5 (LIN) - H18-1 (GND) B - W-B LIN communication line Power switch on (IG) Pulse generation

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

  10. CHECK ID CODE BOX (IMMOBILISER CODE ECU)


    1. Disconnect the H15 ID code box (immobiliser code ECU) connector.

      A0005YQE02

    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
      H15-1 (+B) - H15-5 (GND) R - W-B Auxiliary battery power supply Power switch off 11 to 14 V
      H15-5 (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 H15 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
      H15-2 (LIN1) - H15-5 (GND) B - W-B LIN communication line Power switch on (IG) Pulse generation

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