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.

      A004YURE01

    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 B - Body ground Auxiliary 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) P - W-B LIN communication line Power switch on (IG) Pulse generation
      2A-27 (LIN2) - 2B-6 (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 Side)


    1. Disconnect the K2*1 or J2*2 power window regulator motor assembly (for driver side) connector.


      • *1: for LHD

      • *2: for RHD

      A004VLJE02
      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
      K2-2 (B) - K2-1 (GND) L - W-B Auxiliary battery power supply Power switch off 11 to 14 V
      K2-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      for RHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      J2-2 (B) - J2-1 (GND) L - W-B Auxiliary battery power supply Power switch off 11 to 14 V
      J2-1 (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 K2*1 or J2*2 power window regulator motor 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
      K2-9 (LIN) - K2-1 (GND) B - W-B LIN communication line Power switch on (IG) Pulse generation
      for RHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      J2-9 (LIN) - J2-1 (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 side) may be malfunctioning.

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


    1. Disconnect the J2*1 or K2*2 power window regulator motor assembly (for front passenger side) connector.


      • *1: for LHD

      • *2: for RHD

      A004YEIE02
      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
      J2-2 (B) - J2-1 (GND) L - W-B Auxiliary battery power supply Power switch off 11 to 14 V
      J2-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      for RHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      K2-2 (B) - K2-1 (GND) L - W-B Auxiliary battery power supply Power switch off 11 to 14 V
      K2-1 (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 J2*1 or K2*2 power window regulator motor 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
      J2-9 (LIN) - J2-1 (GND) P - W-B LIN communication line Power switch on (IG) Pulse generation
      for RHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      K2-9 (LIN) - K2-1 (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 side) may be malfunctioning.

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


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

      A004YUZE02

    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) R - W-B Auxiliary battery power supply Power switch off 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 side) 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 Power switch on (IG) Pulse generation

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

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


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

      A004VPME02

    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) R - W-B Auxiliary battery power supply Power switch off 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 side) 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 Power switch on (IG) Pulse generation

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

  6. CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY


    1. Disconnect the K5*1 or J9*2 multiplex network master switch assembly connector.


      • *1: for LHD

      • *2: for RHD

      A004VGAE02
      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
      K5-11 (B) - K5-12 (GND) L - W-B Auxiliary battery power supply Power switch off 11 to 14 V
      K5-12 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      for RHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      J9-11 (B) - J9-12 (GND) R - W-B Auxiliary battery power supply Power switch off 11 to 14 V
      J9-12 (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 K5*1 or J9*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
      K5-17 (LIN1) - K5-12 (GND) P - W-B LIN communication line Power switch on (IG) Pulse generation
      for RHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      J9-17 (LIN1) - J9-12 (GND) P - 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 ASSEMBLY) (w/ Sliding Roof System)


    1. Disconnect the T10 sliding roof ECU (sliding roof drive gear assembly) connector.

      A004VO0E02

    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
      T10-1 (B) - T10-2 (E) R - W-B Auxiliary battery power supply Power switch off 11 to 14 V
      T10-2 (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 T10 sliding roof ECU (sliding roof drive gear assembly) connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      T10-4 (LIN) - T10-2 (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 assembly) may be malfunctioning.

  8. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. Disconnect the H1*1 or H143*2 certification ECU (smart key ECU assembly) connector.


      • *1: w/ Entry Function

      • *2: w/o Entry Function

      A004XHBE02
      Text in Illustration
      *A w/ Entry Function *B w/o Entry Function

    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.

      w/ Entry Function
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      H1-1 (+B) - H1-15 (E) B - W-B Auxiliary battery power supply Power switch off 11 to 14 V
      H1-15 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
      w/o Entry Function
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      H143-1 (+B) - H143-15 (E) B - W-B Auxiliary battery power supply Power switch off 11 to 14 V
      H143-15 (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 H1*1 or H143*2 certification ECU (smart key ECU assembly) connector.


      • *1: w/ Entry Function

      • *2: w/o Entry Function

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

      w/ Entry Function
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      H1-16 (IG) - H1-15 (E) BE - W-B Power switch power supply Power switch on (IG) 11 to 14 V
      H1-16 (IG) - H1-15 (E) BE - W-B Power switch power supply Power switch off Below 1 V
      H1-29 (LIN) - H1-15 (E) B - W-B LIN communication line Power switch on (IG) Pulse generation
      w/o Entry Function
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      H143-16 (IG) - H143-15 (E) BE - W-B Power switch power supply Power switch on (IG) 11 to 14 V
      H143-16 (IG) - H143-15 (E) BE - W-B Power switch power supply Power switch off Below 1 V
      H143-29 (LIN) - H143-15 (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 ID CODE BOX (IMMOBILISER CODE ECU)


    1. Disconnect the H22 ID code box (immobiliser code ECU) connector.

      A004XOQE02

    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
      H22-1 (+B) - H22-8 (GND) B - W-B Auxiliary battery power supply Power switch off 11 to 14 V
      H22-8 (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 H22 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
      H22-3 (LIN1) - H22-8 (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.

  10. CHECK TRANSMISSION CONTROL ECU ASSEMBLY


    1. Disconnect the A21 and A22 transmission control ECU assembly connectors.

      A004WDFE02

    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
      A21-15 (BATT) - Body ground SB - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      A22-1 (E1) - Body ground BR - Body ground Ground Always Below 1 Ω
      A22-5 (E02) - Body ground W-B - Body ground Ground Always Below 1 Ω
      A22-6 (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 A21 and A22 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
      A22-24 (LIN) - A22-1 (E1) B - BR 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 H3 and H4 power management control ECU connectors.

      A004VJTE02

    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
      H3-1 (AM22) - Body ground W - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      H4-7 (AM21) - Body ground W - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      H3-6 (E1) - 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 H3 and H4 power management control ECU connectors.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      H4-11 (LIN2) - H3-6 (E1) B - W-B 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 H140 double lock door control relay assembly connector.

      A004Y4ME02

    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
      H140-1 (+B) - Body ground R - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      H140-7 (CPUB) - Body ground BR - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      H140-14 (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 H140 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
      H140-9 (MPX1) - Body ground P - 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.