LIN COMMUNICATION SYSTEM TERMINALS OF ECU


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

    A019LI1E11

    1. Disconnect the 2D, 2F and 2K instrument panel junction block assembly connectors.

    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
      2F-40 (BECU) - Body ground G - Body ground Battery power supply Always 11 to 14 V
      2K-1 (ACC) - Body ground W - Body ground ACC power supply Always 11 to 14 V
      2D-6 (GND1) - 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 2D, 2F and 2K 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
      2H-25 (LIN2) - 2D-6 (GND1) W - BR LIN communication line Engine switch on (IG) Pulse generation
      2D-27 (LIN2) - 2D-6 (GND1) W - BR LIN communication line Engine switch on (IG) Pulse generation

      If the result is not as specified, the main body ECU (multiplex network body ECU) may be malfunctioning.

  2. CHECK FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH

    A019ND9E65

    1. Disconnect the J1 front power window regulator motor assembly LH connector.

    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
      J1-2 (B) - J1-1 (E) Y - W-B Battery power supply Always 11 to 14 V
      J1-1 (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 J1 front power window regulator motor assembly LH connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      J1-9 (LIN) - J1-1 (E) V - W-B LIN communication line Engine switch on (IG) Pulse generation

      If the result is not as specified, the front power window regulator motor assembly LH may be malfunctioning.

  3. CHECK FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH

    A019ND9E66

    1. Disconnect the I2 front power window regulator motor assembly RH connector.

    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
      I2-2 (B) - I2-1 (E) G - W-B Battery power supply Always 11 to 14 V
      I2-1 (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 I2 front power window regulator motor assembly RH connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      I2-9 (LIN) - I2-1 (E) V - W-B LIN communication line Engine switch on (IG) Pulse generation

      If the result is not as specified, the front power window regulator motor assembly RH may be malfunctioning.

  4. CHECK REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY RH

    A019ND9E45

    1. Disconnect the K2 rear power window regulator motor assembly RH connector.

    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
      K2-2 (B) - K2-1 (E) LG - W-B Battery power supply Always 11 to 14 V
      K2-1 (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 K2 rear power window regulator motor assembly RH connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      K2-9 (LIN) - K2-1 (E) GR - W-B LIN communication line Engine switch on (IG) Pulse generation

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

  5. CHECK REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH

    A019ND9E46

    1. Disconnect the L2 rear power window regulator motor assembly LH connector.

    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 (E) B - W-B Battery power supply Always 11 to 14 V
      L2-1 (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 L2 rear power window regulator motor assembly LH 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 (E) P - W-B LIN communication line Engine switch on (IG) Pulse generation

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

  6. CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

    A019L7WE11
    Text in Illustration
    *1 for LHD *2 for RHD

    1. Disconnect the J7*1 or I12*2 multiplex network master switch assembly connector.


      • *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
      J7-11 (B) - J7-12 (GND) L - W-B Battery power supply Always 11 to 14 V
      J7-12 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      for RHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      I12-11 (B) - I12-12 (GND) P - W-B Battery power supply Always 11 to 14 V
      I12-12 (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 J7*1 or I12*2 multiplex network master switch assembly connector.

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

      for LHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      J7-17 (LIN1) - J7-12 (GND) V - W-B LIN communication line Engine switch on (IG) Pulse generation
      for RHD
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      I12-17 (LIN1) - I12-12 (GND) V - W-B LIN communication line Engine 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)

    A019M0UE17

    1. Disconnect the T2 sliding roof ECU (sliding roof drive gear assembly) connector.

    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
      T2-1 (B) - T2-2 (E) P - W-B Battery power supply Always 11 to 14 V
      T2-2 (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 T2 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
      T2-4 (LIN) - T2-2 (E) W - W-B LIN communication line Engine 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 ROOF SUNSHADE ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY)

    A019M0UE17

    1. Disconnect the T2 roof sunshade ECU (sliding roof drive gear sub-assembly) connector.

    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
      T2-1 (B) - T2-2 (E) P - W-B Battery power supply Always 11 to 14 V
      T2-2 (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 T2 roof sunshade 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
      T2-4 (LIN) - T2-2 (E) W - W-B LIN communication line Engine switch on (IG) Pulse generation

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

  9. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    A019OS8E01

    1. Disconnect the F58 certification ECU (smart key ECU assembly) connector.

    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
      F58-1 (+B) - F58-15 (E) LG - W-B Battery power supply Always 11 to 14 V
      F58-15 (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 F58 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
      F58-16 (IG) - F58-15 (E) B - W-B Engine switch power supply Engine switch on (IG) 11 to 14 V
      F58-16 (IG) - F58-15 (E) B - W-B Engine switch power supply Engine switch off Below 1 V
      F58-29 (LIN) - F58-15 (E) V - W-B LIN communication line Engine switch on (IG) Pulse generation

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

  10. CHECK ID CODE BOX (IMMOBILISER CODE ECU)

    A019JSWE07

    1. Disconnect the F45 ID code box (immobiliser code ECU) connector.

    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
      F45-1 (+B) - F45-8 (GND) B - W-B Battery power supply Always 11 to 14 V
      F45-8 (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 F45 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
      F45-3 (LIN1) - F45-8 (GND) R - W-B LIN communication line Engine switch on (IG) Pulse generation

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

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

    A019N28E31

    1. Disconnect the F37 steering lock ECU (steering lock actuator assembly) connector.

    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
      F37-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      F37-6 (IG2) - F37-1 (GND) B - W-B Engine switch power supply Engine switch on (IG) 11 to 14 V
      F37-6 (IG2) - F37-1 (GND) B - W-B Engine switch power supply Engine switch off Below 1 V
      F37-7 (B) - F37-1 (GND) L - W-B Battery 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 F37 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
      F37-5 (LIN) - F37-1 (GND) R - W-B LIN communication line Engine switch on (IG) Pulse generation

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

  12. CHECK POWER MANAGEMENT CONTROL ECU

    A019LD0E05

    1. Disconnect the F8 power management control ECU connector.

    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
      F8-1 (AM22) - Body ground SB - Body ground Battery power supply Always 11 to 14 V
      F8-2 (AM21) - Body ground R - Body ground Battery power supply Always 11 to 14 V
      F8-6 (GND) - Body ground BR - Body ground Ground Always Below 1 Ω
      F8-5 (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.

    3. Reconnect the F8 power management control ECU connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      F8-24 (LIN2) - F8-6 (GND) V - BR LIN communication line Engine switch on (IG) Pulse generation

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

  13. CHECK ACCESSORY METER ASSEMBLY (w/o Navigation System)

    A019PJUE03

    1. Disconnect the G1 accessory meter assembly connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      G1-1 (IG+) - Body ground V - Body ground Engine switch power supply Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      G1-2 (IG2) - Body ground LG - Body ground Engine switch power supply Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      G1-3 (ACC) - Body ground W - Body ground Engine switch power supply Engine switch off Below 1 V
      Engine switch on (ACC) 11 to 14 V
      G1-12 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      G1-13 (+B) - Body ground GR - Body ground Battery 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 G1 accessory meter assembly connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      G1-20 (LIN1) - Body ground SB - Body ground LIN communication line Engine switch on (IG) Pulse generation

      If the result is not as specified, the accessory meter assembly may be malfunctioning.

  14. CHECK AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY)

    A019MSGE11

    1. Disconnect the A53 AFS ECU (headlight swivel ECU assembly) connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      A53-22 (E1) - Body ground W-B - Body ground AFS ECU (headlight swivel ECU assembly) ground Always Below 1 Ω
      A53-15 (IG) - Body ground V - Body ground AFS ECU (headlight swivel ECU assembly) power supply Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V

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

    3. Reconnect the A53 AFS ECU (headlight swivel ECU assembly) connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      A53-10 (SMR) - A53-22 (E1) L - W-B LIN communication line Engine switch off Below 1 V
      Engine switch on (IG) Pulse generation
      A53-29 (SML) - A53-22 (E1) P - W-B LIN communication line Engine switch off Below 1 V
      Engine switch on (IG) Pulse generation
      A53-30 (LH+) - A53-22 (E1) GR - W-B LIN communication line Engine switch off Below 1 V
      Engine switch on (IG) Pulse generation
      A53-28 (RH+) - A53-22 (E1) V - W-B LIN communication line Engine switch off Below 1 V
      Engine switch on (IG) Pulse generation

      If the result is not as specified, the AFS ECU (headlight swivel ECU assembly) may be malfunctioning.

  15. CHECK WINDSHIELD WIPER SWITCH ASSEMBLY

    A019LMDE05

    1. Disconnect the F42 windshield wiper switch assembly connector*1.

    2. Disconnect the F81 windshield wiper switch assembly connector*2.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition

      F42-1 (EW) - Body ground*1

      F81-9 (EW) - Body ground*2

      		 W-B - Body ground Body ground Always Below 1 Ω

      F42-3 (WIG) - Body ground*1

      F81-7 (WIG) - Body ground*2

      		 R - Body ground Power source circuit Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V

      F42-17 (+B) - Body ground*1

      F42-11 (+B) - Body ground*2

      		 L - Body ground Power source circuit Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V

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

    4. Reconnect the F42 windshield wiper switch assembly connector*1.

    5. Reconnect the F81 windshield wiper switch assembly connector*2.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition

      F42-5 (MPX1) - Body ground*1

      F81-5 (MPX1) - Body ground*2

      		 V - Body ground LIN communication line Engine switch on (IG) Pulse generation

      If the result is not as specified, the windshield wiper relay assembly may be malfunctioning.


      • *1: for LHD, RHD light control switch LH side type.

      • *2: for RHD light control switch RH side type.

  16. CHECK DOUBLE LOCK DOOR CONTROL RELAY

    A019L8QE10

    1. Disconnect the F84 double lock door control relay connector.

    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
      F84-1 (+B) - Body ground R - Body ground Battery power supply Always 11 to 14 V
      F84-7 (CPUB) - Body ground SB - Body ground Battery power supply Always 11 to 14 V
      F84-14 (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 F84 double lock door control relay connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      F84-9 (LIN) - Body ground W - Body ground LIN communication line Double lock UNSET Pulse generation

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