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HOMESERVICE MANUALSLEXUS2010RX 450H 3.5 BREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESLIN COMMUNICATION SYSTEM (DIAGNOSTICS - INTRODUCTION)LIN COMMUNICATION SYSTEMTERMINALS OF ECUTERMINALS OF ECU
2010 Lexus RX 450h 3.5 B

Terminals Of Ecu

2010 Lexus RX 450h 3.5 BSECTION Terminals Of Ecu
  1. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 
    Fig 1: Identifying 2D, 2F And 2K Instrument Panel Junction Block Assembly Connectors
    GTY261994Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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.

      HINT: 

      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 Auxiliary battery power supply Always 11 to 14 V
      2K-1 (ACC) - Body ground B - 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 Power switch on (IG) Pulse generation
      2D-27 (LIN2) - 2D-6 (GND1) W - BR LIN communication line Power 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 
    Fig 2: Identifying J1 Front Power Window Regulator Motor Assembly LH Connector
    GTY269872Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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.

      HINT: 

      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 Auxiliary 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 Power 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 
    Fig 3: Identifying I2 Front Power Window Regulator Motor Assembly RH Connector
    GTY269871Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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.

      HINT: 

      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 Auxiliary 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 Power 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 
    Fig 4: Identifying K2 Rear Power Window Regulator Motor Assembly RH Connector
    GTY269881Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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.

      HINT: 

      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 Auxiliary 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 Power 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 
    Fig 5: Identifying L2 Rear Power Window Regulator Motor Assembly LH Connector
    GTY269880Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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.

      HINT: 

      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 Auxiliary 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 Power 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 
    Fig 6: Identifying J7 Multiplex Network Master Switch Assembly Connector
    GTY277167Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the J7 multiplex network master switch assembly connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.

      HINT: 

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      J7-11 (B) - J7-12 (GND) L - W-B Auxiliary battery power supply Always 11 to 14 V
      J7-12 (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 multiplex network master switch assembly connector.
    4. Check for pulses according to the value(s) in the table below.
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      J7-17 (LIN1) - J7-12 (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 ASSEMBLY) 
    Fig 7: Identifying T2 Sliding Roof ECU (Sliding Roof Drive Gear Assembly) Connector
    GTY272116Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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.

      HINT: 

      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 Auxiliary 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 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) 
    Fig 8: Identifying F58 Certification ECU (Smart Key ECU Assembly) Connector
    GTY261087Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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.

      HINT: 

      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 Auxiliary 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 Power switch power supply Power switch on (IG) 11 to 14 V
      F58-16 (IG) - F58-15 (E) B - W-B Power switch power supply Power switch off Below 1 V
      F58-29 (LIN) - F58-15 (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 (IMMOBILIZER CODE ECU) 
    Fig 9: F45 ID Code Box (Immobiliser Code ECU) Connector
    GTY260456Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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.

      HINT: 

      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 Auxiliary 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 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 STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) 
    Fig 10: Identifying F37 Steering Lock ECU (Steering Lock Actuator Assembly) Connector
    GTY256311Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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.

      HINT: 

      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 Power switch power supply Power switch on (IG) 11 to 14 V
      F37-6 (IG2) - F37-1 (GND) B - W-B Power switch power supply Power switch off Below 1 V
      F37-7 (B) - F37-1 (GND) L - W-B Auxiliary 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 Power switch on (IG) Pulse generation

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

  11. CHECK POWER MANAGEMENT CONTROL ECU 
    Fig 11: Identifying F97 and F98 Power Management Control ECU Connector
    GTY260334Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the F97 and F98 power management control ECU connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.

      HINT: 

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      F97-1 (AM22) - Body ground SB - Body ground Auxiliary battery power supply Always 11 to 14 V
      F98-7 (AM21) - Body ground R - Body ground Auxiliary battery power supply Always 11 to 14 V
      F97-5 (E01) - Body ground BR - Body ground Ground Always Below 1 Ω
      F98-5 (E02) - 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 F97 and F98 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
      F98-11 (LIN2) - F97-5 (E01) 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. ACCESSORY METER ASSEMBLY (w/o Navigation System) 
    Fig 12: Identifying G1 Connector
    GTY274271Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the G1 connector.
    2. Measure the voltage and resistance and check for pulses 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 Power switch power supply Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      G1-2 (IG2) - Body ground LG - Body ground Power switch power supply Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      G1-3 (ACC) - Body ground W - Body ground Power switch power supply Power switch off Below 1 V
      Power 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 Auxiliary battery power supply Always 11 to 14 V
      G1-20 (LIN1) - Body ground SB - Body ground LIN communication signal Power switch on (IG) Pulse generation

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

    3. Reconnect the G1 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 signal Power switch on (IG) Pulse generation

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

  13. CHECK AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY) 
    Fig 13: Identifying A53 AFS ECU (Headlight Swivel ECU Assembly) Connector
    GTY279351Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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 Power switch off Below 1 V
      Power 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 Swivel motor RH LIN communication Power switch off Below 1 V
      Power switch on (IG) Pulse generation
      A53-29 (SML) - A53-22 (E1) P - W-B Swivel motor LH LIN communication Power switch off Below 1 V
      Power switch on (IG) Pulse generation

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

  14. CHECK INNER REAR VIEW MIRROR ASSEMBLY (w/ Automatic High Beam System) 
    Fig 14: Identifying T5 Inner Rear View Mirror Assembly Connector
    GTY285309Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the T5 inner rear view mirror assembly connector.
    2. Measure the resistance and voltage according to the value(s) in the table below.
      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      T5-2 (E) - Body ground W - Body ground Inner rear view mirror assembly ground Always Below 1 Ω
      T5-1 (IG) - Body ground B - Body ground Inner rear view mirror assembly power supply Power switch off Below 1 V
      Power 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 T5 inner rear view mirror 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
      T5-12 (LIN) - T5-2 (E) L - W LIN communication line Power switch off Below 1 V
      Automatic high beam system operates Pulse generation
      (waveform 1)

      If the result is not as specified, the inner rear view mirror assembly may be malfunctioning.

  15. CHECK WINDSHIELD WIPER SWITCH ASSEMBLY 
    Fig 15: Identifying F42 Windshield Wiper Switch Assembly Connector
    GTY264570Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the F42 windshield wiper switch 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
      F42-1 (EW) - Body ground W-B - Body ground Body ground Always Below 1 Ω
      F42-3 (WIG) - Body ground R - Body ground Power source circuit Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      F42-17 (+B) - Body ground L - Body ground Power source circuit Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V

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

    3. Reconnect the F42 windshield wiper switch assembly connector.
    4. 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 V - Body ground Rain sensor signal Power switch on (IG) Pulse generation

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

RENDER: 1.0x

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