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Home >> Lexus >> 2019 >> ES 350 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 211 (Lin Communication System (Hybrid) - Diagnostics - Introduction) >> LIN COMMUNICATION SYSTEM (for HV Model) >> Terminals Of Ecu [06/2018 - 09/2022] >> Terminals Of Ecu [06/2018 - 09/2022]

Terminals Of Ecu [06/2018 - 09/2022]

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus ES 300h, 2023 Lexus ES 300h, 2022 Lexus ES 300h, 2021 Lexus ES 300h, and 2020 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 
    Fig 1: Instrument Panel Junction Block Assembly And Main Body ECU (Multiplex Network Body ECU) Connector End View
    GTY820040Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the MB main body ECU (multiplex network body ECU) connector.

      Refer to REMOVAL [06/2018 - 08/2021] , or refer to REMOVAL [08/2021 - 09/2022]

    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.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      MB-11 (GND1) - Body ground - Ground Always Below 1 Ω
      MB-31 (BECU) - Body ground - Auxiliary battery power supply Power switch off 11 to 14 V
      MB-30 (ACC) - Body ground - ACC power supply Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      MB-32 (IG) - Body ground - IG power supply Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
    3. Reconnect the MB main body ECU (multiplex network body ECU) connector.
    4. Check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      3D-25 - Body ground BE - Body ground LIN communication line Power switch on (IG) Pulse generation
      3D-17 - Body ground L - Body ground LIN communication line Power switch on (IG) Pulse generation
  2. CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (DRIVER DOOR) 
    Fig 2: Power Window Regulator Motor Assembly (Driver Door) Connector End View
    GTY798773Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the J27 power window regulator motor assembly (driver door) 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.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      J27-2 (B) - Body ground GR - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      J27-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
    3. Reconnect the J27 power window regulator motor assembly (driver door) connector.
    4. Check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      J27-9 (LIN) - Body ground G - Body ground LIN communication line Power switch on (IG) Pulse generation
  3. CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (FRONT PASSENGER DOOR) 
    Fig 3: Power Window Regulator Motor Assembly (Front Passenger Door) Connector End View
    GTY798772Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the J5 power window regulator motor assembly (front passenger door) 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.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      J5-2 (B) - Body ground GR - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      J5-1 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
    3. Reconnect the J5 power window regulator motor assembly (front passenger door) connector.
    4. Check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      J5-9 (LIN) - Body ground P - Body ground LIN communication line Power switch on (IG) Pulse generation
  4. CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR RH DOOR) 
    Fig 4: Power Window Regulator Motor Assembly (Rear RH Door) Connector End View
    GTY798144Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L4 power window regulator motor assembly (rear RH door) 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.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      L4-2 (B) - Body ground B - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      L4-1 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
    3. Reconnect the L4 power window regulator motor assembly (rear RH door) connector.
    4. Check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      L4-9 (LIN) - Body ground P - Body ground LIN communication line Power switch on (IG) Pulse generation
  5. CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR LH DOOR) 
    Fig 5: Power Window Regulator Motor Assembly (Rear LH Door) Connector End View
    GTY798143Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the L10 power window regulator motor assembly (rear LH door) 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.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      L10-2 (B) - Body ground B - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      L10-1 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
    3. Reconnect the L10 power window regulator motor assembly (rear LH door) connector.
    4. Check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      L10-9 (LIN) - Body ground P - Body ground LIN communication line Power switch on (IG) Pulse generation
  6. CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY 
    Fig 6: Multiplex Network Master Switch Assembly Connector End View
    GTY784206Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the J20 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.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      J20-11 (B) - Body ground LA-R - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      J20-12 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
    3. Reconnect the J20 multiplex network master switch assembly connector.
    4. Check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      J20-17 (LIN1) - Body ground P - Body ground LIN communication line Power switch on (IG) Pulse generation
  7. CHECK SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) 
    Fig 7: Sliding Roof ECU (Sliding Roof Drive Gear Sub-Assembly) Connector End View
    GTY813637Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the P22 sliding roof ECU (sliding roof drive gear sub-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.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      P22-1 (B) - Body ground B - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      P22-2 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
    3. Reconnect the P22 sliding roof ECU (sliding roof drive gear sub-assembly) connector.
    4. Check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      P22-7 (MPX1) - Body ground LA-P - Body ground LIN communication line Power switch on (IG) Pulse generation
  8. CHECK KICK DOOR CONTROL SENSOR (w/ Power Trunk Lid System) 
    Fig 8: Kick Door Control Sensor (W/ Power Trunk Lid System) Connector End View
    GTY790210Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the S5 kick door control sensor connector.
    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
      S5-1 (B) - Body ground B - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      S5-4 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
    3. Reconnect the S5 kick door control sensor connector.
    4. Measure the pulse according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      S5-2 (LIN) - Body ground G - Body ground LIN communication line Power switch on (IG) Pulse generation
  9. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 
    Fig 9: Certification ECU (Smart Key ECU Assembly) Connector End View
    GTY807892Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the G47 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.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G47-4 (+B) - Body ground W - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      G47-18 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
    3. Reconnect the G47 certification ECU (smart key ECU assembly) connector.
    4. Check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G47-13 (LIN) - Body ground B - Body ground LIN communication line Power switch on (IG) Pulse generation
  10. CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) 
    Fig 10: Steering Lock ECU (Steering Lock Actuator Or Upper Bracket Assembly) Connector End View
    GTY796399Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the G51 steering lock ECU (steering lock actuator or upper bracket assembly) connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G51-7 (B) - Body ground G - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      G51-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
    3. Reconnect the G51 steering lock ECU (steering lock actuator or upper bracket assembly) connector.
    4. Check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G51-5 (LIN) - Body ground B - Body ground LIN communication line Power switch on (IG) Pulse generation
  11. CHECK ID CODE BOX (IMMOBILISER CODE ECU) 
    Fig 11: ID Code Box (Immobiliser Code ECU) Connector End View
    GTY786284Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the G52 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.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G52-5 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      G52-1 (+B) - Body ground G - Body ground +B power supply Power switch off 11 to 14 V
    3. Reconnect the G52 ID code box (immobiliser code ECU) connector.
    4. Check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G52-2 (LIN1) - Body ground B- Body ground LIN communication line Power switch on (IG) Pulse generation
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