LIN COMMUNICATION SYSTEM TERMINALS OF ECU


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


    1. Disconnect the 2C and 2B instrument panel junction block assembly connectors.

      A003T11E03

    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
      2C-18 (BECU) - Body ground W - Body ground Battery power supply Power switch off 11 to 14 V
      2B-6 (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 2C and 2B 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
      2D-26 (LIN2) - 2B-6 (GND1) V - W-B LIN communication line Power switch on (IG) Pulse generation
      2A-27 (LIN2) - 2B-6 (GND1) V - 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 FRONT DOOR WINDOW REGULATOR ASSEMBLY (for Driver Side)


    1. Disconnect the I6*1 or H5*2 front door window regulator assembly (for driver side) connector.


      • *1: for LHD

      • *2: for RHD

      A003TBGE73
      Text in Illustration
      *1 for LHD *2 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
      I6-2 (B) - I6-1 (GND) L - W-B Battery power supply Power switch off 11 to 14 V
      I6-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      for RHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      H5-2 (B) - H5-1 (GND) L - W-B Battery power supply Power switch off 11 to 14 V
      H5-1 (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 I6*1 or H5*2 front door window regulator assembly (for driver side) 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
      I6-9 (LIN) - I6-1 (GND) B - W-B LIN communication line Power switch on (IG) Pulse generation
      for RHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      H5-9 (LIN) - H5-1 (GND) P - W-B LIN communication line Power switch on (IG) Pulse generation

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

  3. CHECK FRONT DOOR WINDOW REGULATOR ASSEMBLY (for Front Passenger Side)


    1. Disconnect the H13*1 or I11*2 front door window regulator assembly (for front passenger side) connector.


      • *1: for LHD

      • *2: for RHD

      A003TBGE74
      Text in Illustration
      *1 for LHD *2 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
      H13-2 (B) - H13-1 (GND) G - W-B Battery power supply Power switch off 11 to 14 V
      H13-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      for RHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      I11-2 (B) - I11-1 (GND) G - W-B Battery power supply Power switch off 11 to 14 V
      I11-1 (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 H13*1 or I11*2 front door window regulator assembly (for front passenger side) 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
      H13-9 (LIN) - H13-1 (GND) V - W-B LIN communication line Power switch on (IG) Pulse generation
      for RHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      I11-9 (LIN) - I11-1 (GND) V - W-B LIN communication line Power switch on (IG) Pulse generation

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

  4. CHECK REAR DOOR WINDOW REGULATOR ASSEMBLY (for Rear RH Side)


    1. Disconnect the J6 rear door window regulator assembly (for rear RH side) connector.

      A003TBGE75

    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
      J6-2 (B) - J6-1 (GND) L - W-B Battery power supply Power switch off 11 to 14 V
      J6-1 (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 J6 rear door window regulator assembly (for rear RH side) connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      J6-9 (LIN) - J6-1 (GND) V - W-B LIN communication line Power switch on (IG) Pulse generation

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

  5. CHECK REAR DOOR WINDOW REGULATOR ASSEMBLY (for Rear LH Side)


    1. Disconnect the K6 rear door window regulator assembly (for rear LH side) connector.

      A003TBGE76

    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
      K6-2 (B) - K6-1 (GND) P - W-B Battery power supply Power switch off 11 to 14 V
      K6-1 (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 K6 rear door window regulator assembly (for rear LH side) connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      K6-9 (LIN) - K6-1 (GND) V - W-B LIN communication line Power switch on (IG) Pulse generation

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

  6. CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY


    1. Disconnect the I13*1 or H12*2 multiplex network master switch assembly connector.


      • *1: for LHD

      • *2: for RHD

      A003UQAE21
      Text in Illustration
      *1 for LHD *2 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
      I13-11 (B) - I13-12 (GND) W - W-B Battery power supply Power switch off 11 to 14 V
      I13-12 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      for RHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      H12-11 (B) - H12-12 (GND) W - W-B Battery power supply Power switch off 11 to 14 V
      H12-12 (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 I13*1 or H12*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
      I13-17 (LIN1) - I13-12 (GND) V - W-B LIN communication line Power switch on (IG) Pulse generation
      for RHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      H12-17 (LIN1) - H12-12 (GND) V - W-B 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) (w/ Sliding Roof)


    1. Disconnect the O9 sliding roof ECU (sliding roof drive gear sub-assembly) connector.

      A003UCOE31

    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
      O9-1 (B) - O9-2 (E) L - W-B Battery power supply Power switch off 11 to 14 V
      O9-2 (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 O9 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
      O9-4 (MPX1) - O9-2 (E) V - 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 E117 certification ECU (smart key ECU assembly) connector.

      A003SNTE26

    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
      E117-1 (+B) - E117-17 (E) W - W-B Battery power supply Power switch off 11 to 14 V
      E117-17 (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 E117 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
      E117-18 (IG) - E117-17 (E) B - W-B Power switch power supply Power switch on (IG) 11 to 14 V
      E117-18 (IG) - E117-17 (E) B - W-B Power switch power supply Power switch off Below 1 V
      E117-10 (LIN) - E117-17 (E) V - 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 ID CODE BOX (IMMOBILISER CODE ECU)


    1. Disconnect the E22 ID code box (immobiliser code ECU) connector.

      A003RQVE17

    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
      E22-1 (+B) - E22-8 (GND) B - W-B Battery power supply Power switch off 11 to 14 V
      E22-8 (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 E22 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
      E22-3 (LIN1) - E22-8 (GND) V - 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.

  10. CHECK TRANSMISSION CONTROL ECU ASSEMBLY


    1. Disconnect the A96 and A97 transmission control ECU assembly connectors.

      A003SBUE04

    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
      A96-15 (BATT) - Body ground B - Body ground Battery power supply Power switch off 11 to 14 V
      A97-1 (E1) - Body ground BR - Body ground Ground Always Below 1 Ω
      A97-5 (E02) - Body ground W-B - Body ground Ground Always Below 1 Ω
      A97-6 (E01) - 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 A96 and A97 transmission control ECU assembly connectors.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      A97-24 (LIN) - A97-1 (E1) V - W-B LIN communication line Power switch on (IG) Pulse generation

      If the result is not as specified, the transmission control ECU assembly may be malfunctioning.

  11. CHECK POWER MANAGEMENT CONTROL ECU


    1. Disconnect the E111 and E112 power management control ECU connectors.

      A003TO4E19

    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
      E111-1 (AM22) - Body ground W*1 Y*2 - Body ground Battery power supply Power switch off 11 to 14 V
      E112-7 (AM21) - Body ground W - Body ground Battery power supply Power switch off 11 to 14 V
      E111-6 (E1) - 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 E111 and E112 power management control ECU connectors.


      • *1: for LHD

      • *2: for RHD

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      E112-11 (LIN2) - E111-6 (E1) V - BR LIN communication line Power switch on (IG) Pulse generation

      If the result is not as specified, the power management control ECU may be malfunctioning.

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


    1. Disconnect the E72 double lock door control relay assembly connector.

      A003UZ0E13

    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
      E72-1 (+B) - Body ground B - Body ground Battery power supply Power switch off 11 to 14 V
      E72-7 (CPUB) - Body ground W - Body ground Battery power supply Power switch off 11 to 14 V
      E72-14 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    3. Reconnect the E72 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
      E72-9 (MPX1) - Body ground V - 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.