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Terminals Of Ecu

  1. CHECK CERTIFICATION ECU 
    Fig 1: Identifying Certification ECU Connector
    G04021943Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the U28 ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      VOLTAGE AND RESISTANCE REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      +B1 (U28-1) - Body ground R - Body ground +B power supply Always 10 to 14 V
      IG (U28-18) - Body ground B - Body ground Ignition power supply Engine switch off Below 1 V
      IG (U28-18) - Body ground B - Body ground Ignition power supply Engine switch on (IG) 10 to 14 V
      E (U28-17) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, the wire harness side may have a malfunction.

    3. Reconnect the U28 ECU connector.
    4. Measure the voltage of the connector.
      VOLTAGE REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      CLG1 (U28-33) - CG1B (U28-34) W - R Door electrical key oscillator (front LH) sensor signal All door closed, all door locked and engine switch off Alternating between 5V and below 1V
      CLG1 (U28-33) - CG1B (U28-34) W - R Door electrical key oscillator (front LH) sensor signal Door unlocked or door open Below 1V
      SEN1 (U28-22) - E (U28- 17) V - W-B Touch sensor detection signal Outside door handle touched 10 to 14 V
      SEN1 (U28-22) - E (U28-17) V - W-B Touch sensor detection signal Outside door handle not touched Below 1 V
      SEL1 (U28-5) - E (U28-17) B - W-B Touch sensor activation control signal Key at least 3 m (9.8 ft) away from door 10 to 14 V
      SEL1 (U28-5) - E (U28-17) B - W-B Touch sensor activation control signal Close to door Below 1 V
      CLG2 (U28-35) - CG2B (U28-36) B - W Door electrical key oscillator (front RH) sensor signal All door closed, all door locked and engine switch off Alternating between 5V and below 1V
      CLG2 (U28-35) - CG2B (U28-36) B - W Door electrical key oscillator (front RH) sensor signal Door unlocked or door open Below 1V
      SEN2 (U28-23) - E (U28- 17) R - W-B Touch sensor detection signal Outside door handle touched 10 to 14 V
      SEN2 (U28-23) - E (U28- 17) R - W-B Touch sensor detection signal Outside door handle not touched Below 1 V
      SEL2 (U28-6) - E (U28-17) G - W-B Touch sensor activation control signal Key at least 3 m (9.8 ft) away from door 10 to 14 V
      SEL2 (U28-6) - E (U28-17) G - W-B Touch sensor activation control signal Close to door Below 1 V
      CLG3 (U33-8) - CG3B (U28-9) R - W Door electrical key oscillator (rear LH) sensor signal All door closed, all door locked and engine switch off Alternating between 5V and below 1V
      CLG3 (U33-8) - CG3B (U28-9) R - W Door electrical key oscillator (rear LH) sensor signal Door unlocked or door open Below 1V
      SEN3 (U33-28) - E (U28- 17) BR - W-B Touch sensor detection signal Outside door handle touched 10 to 14 V
      SEN3 (U33-28) - E (U28- 17) BR - W-B Touch sensor detection signal Outside door handle not touched Below 1 V
      SEL3 (U33-1) - E (U28-17) O - W-B Touch sensor activation control signal Key at least 3 m (9.8 ft) away from door 10 to 14 V
      SEL3 (U33-1) - E (U28-17) O - W-B Touch sensor activation control signal Close to door Below 1 V
      CLG4 (U33-10) - CG4B (U33-11) B - Y Door electrical key oscillator (rear RH) sensor signal All door closed, all door locked and engine switch off Alternating between 5V and below 1V
      CLG4 (U33-10) - CG4B (U33-11) B - Y Door electrical key oscillator (rear RH) sensor signal Door unlocked or door open Below 1V
      SEN4 (U33-27) - E (U28- 17) O - W-B Touch sensor detection signal Outside door handle touched 10 to 14 V
      SEN4 (U33-27) - E (U28- 17) O - W-B Touch sensor detection signal Outside door handle not touched Below 1 V
      SEL4 (U33-2) - E (U28-17) LG - W-B Touch sensor activation control signal Key at least 3 m (9.8 ft) away from door 10 to 14 V
      SEL4 (U33-2) - E (U28-17) LG - W-B Touch sensor activation control signal Close to door Below 1 V
      CLG5 (U28-11) - CG5B (U28-12) GR - BR Indoor electrical key oscillator (front) sensor signal 30 seconds after driver side door opened and closed, engine switch off Alternating between 5V and below 1V
      CLG5 (U28-11) - CG5B (U28-12) GR - BR Indoor electrical key oscillator (front) sensor signal With in 30 seconds driver side door opened and closed, engine switch off Below 1V
      CLG6 (U28-13) - CG6B (U28-14) Y - L Indoor electrical key oscillator (rear) sensor signal 30 seconds after driver side door opened and closed, engine switch off Alternating between 5V and below 1V
      CLG6 (U28-13) - CG6B (U28-14) Y - L Indoor electrical key oscillator (rear) sensor signal With in 30 seconds driver side door opened and closed, engine switch off Below 1V
      CLG7 (U28-15) - CG7B (U28-16) P - V Luggage electrical key oscillator (inner) sensor signal Luggage compartment door opening switch OFF Alternating between 5V and below 1V
      CLG7 (U28-15) - CG7B (U28-16) P - V Luggage electrical key oscillator (inner) sensor signal Luggage compartment door opening switch ON Below 1V
      CLG8 (U28-31) - CG7B (U28-32) L - LG Luggage electrical key oscillator (outer) sensor signal Luggage compartment door opening switch OFF Alternating between 5V and below 1V
      CLG8 (U28-31) - CG7B (U28-32) L - LG Luggage electrical key oscillator (outer) sensor signal Luggage compartment door opening switch ON Below 1V
      RCO (U28-29) - E (U28- 17) P - W-B Entry door control receiver power source All door closed, all door locked and engine switch off 0 to 6 V
      RCO (U28-29) - E (U28- 17) P - W-B Entry door control receiver power source Door unlocked or door open Below 1 V
      RSSI (U28-39) - E (U28- 17) GR - W-B Entry door control receiver electric wave existence signal All door closed, all door locked and engine switch off 0 to 5 V
      RSSI (U28-39) - E (U28- 17) GR - W-B Entry door control receiver electric wave existence signal Door unlocked or door open Below 1 V
      RDA (U28-38) - E (U28- 17) G - W-B Entry door control receiver data input signal All door closed, all door locked and engine switch off Below 1 V
      RDA (U28-38) - E (U28- 17) G - W-B Entry door control receiver data input signal Door unlocked or door open Approx. 6 to 7 V

      If the result is not as specified, the ECU may have a malfunction.

  2. CHECK COWL SIDE JUNCTION BLOCK RH ASSEMBLY (MULTIPLEX NETWORK BODY ECU) 
    Fig 2: Identifying Cowl Side Junction Block RH Assembly (Multiplex Network Body ECU) Connector
    G04021944Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the DD, DK, DM and DN junction block connectors.
    2. Measure the voltage and resistance of the wire harness side connectors.
      VOLTAGE AND RESISTANCE REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      BECU (DK-5) - Body ground G-R - Body ground +B (ECUB) engine supply Always 10 to 14 V
      ALTB (DM-1) - Body ground B - Body ground +B (power system, generator system) power supply Always 10 to 14 V
      BATB (DN-1) - Body ground R - Body ground +B (power system, generator system) power supply Always 10 to 14 V
      GND2 (DD-7) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, the wire harness side may have a malfunction.

    3. Reconnect the DD, DK, DM and DN junction block connectors.
    4. Measure the resistance of the connector.
      RESISTANCE REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      TSW (K68-2) - GND2 (DD- 7) BR - W-B Luggage compartment door opener cancel switch signal Luggage compartment door opener cancel switch not pushed 10 kΩ or higher
      TSW (K68-2) - GND2 (DD- 7) BR - W-B Luggage compartment door opener cancel switch signal Luggage compartment door opener cancel switch pushed Below 1 Ω

      If the result is not as specified, the junction block may have a malfunction.

  3. CHECK MULTIPLEX NETWORK DOOR ECU FRONT LH (DRIVER DOOR ECU) 
    Fig 3: Identifying Multiplex Network Door ECU Front LH (Driver Door ECU) Connector
    G04021945Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the N3 and N4 ECU connectors.
    2. Measure the resistance and voltage of the wire harness side connectors.
      VOLTAGE AND RESISTANCE REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND (N4-1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      CPUB (N3-4) - GND (N4- 1) LG - W-B CPUB power supply Always 10 to 14 V
      BDR (N3-6) - GND (N4-1) L - W-BL - W-B BDR power supply Always 10 to 14 V
      SIG (N3-3) - GND (N4-1) Y - W-B IG power supply Engine switch on (IG) 10 to 14 V
      TRG+ (N4-18) - GND (N4- 1) L - W-B Lock switch signal Lock switch not pushed 10 kΩ or higher
      TRG+ (N4-18) - GND (N4- 1) L - W-B Lock switch signal Lock switch pushed Below 1 Ω

      If the result is not as specified, the wire harness side may have a malfunction.

    3. Reconnect the N3 and N4 connectors.
    4. Measure the voltage of the connectors.
      VOLTAGE REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      OSCB (N4-7) - OSCE (N4- 20) SB - G Power source supply Always 10 to 14 V

      If the result is not as specified, the ECU may have a malfunction.

  4. CHECK MULTIPLEX NETWORK DOOR ECU FRONT RH (FRONT PASSENGER DOOR ECU) 
    Fig 4: Identifying Multiplex Network Door ECU Front RH (Front Passenger Door ECU) Connector
    G04021946Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the M3 and M4 ECU connectors.
    2. Measure the resistance and voltage of the wire harness side connectors.
      VOLTAGE AND RESISTANCE REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND (M4-1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      CPUB (M4-4) - GND (M4- 1) L-G - W-B CPUB power supply Always 10 to 14 V
      BDR (M4-6) - GND (M4-1) L - W-B BDR power supply Always 10 to 14 V
      SIG (M4-3) - GND (M4-1) L - W-B IG power supply Engine switch on (IG) 10 to 14 V
      TRG+ (M3-18) - GND (M4-1) L - W-B Lock switch signal Lock switch not pushed 10 kΩ or higher
      TRG+ (M3-18) - GND (M4-1) L - W-B Lock switch signal Lock switch pushed Below 1 Ω

      If the result is not as specified, the wire harness side may have a malfunction.

    3. Reconnect the M3 and M4 connectors.
    4. Measure the voltage of the connectors.
      VOLTAGE REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      OSCB (M3-7) - OSCE (M3-20) R - G Power source supply Always 10 to 14 V

      If the result is not as specified, the ECU may have a malfunction.

  5. CHECK MULTIPLEX NETWORK DOOR ECU REAR LH (REAR DOOR LH ECU) 
    Fig 5: Identifying Multiplex Network Door ECU Rear LH (Rear Door LH ECU) Connector
    G04021947Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the P2 and P3 ECU connectors.
    2. Measure the resistance and voltage of the wire harness side connectors.
      VOLTAGE AND RESISTANCE REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND (P2-1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      CPUB (P2-4) - GND (P2- 1) BR - W-B CPUB power supply Always 10 to 14 V
      BDR (P2-6) - GND (P2-1) L - W-B BDR power supply Always 10 to 14 V
      SIG (P2-3) - GND (P2-1) G - W-B IG power supply Engine switch on (IG) 10 to 14 V
      TRG+ (P3-18) - GND (P2-1) L - W-B Lock switch signal Lock switch not pushed 10 kΩ or higher
      TRG+ (P3-18) - GND (P2-1) L - W-B Lock switch signal Lock switch pushed Below 1 Ω

      If the result is not as specified, the wire harness side may have a malfunction.

    3. Reconnect the P2 and P3 connectors.
    4. Measure the voltage of the connectors.
      VOLTAGE REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      OSCB (P2-7) - OSCE (P2- 20) R - G Power source supply Always 10 to 14 V

      If the result is not as specified, the ECU may have a malfunction.

  6. CHECK MULTIPLEX NETWORK DOOR ECU REAR RH (REAR DOOR RH ECU) 
    Fig 6: Identifying Multiplex Network Door ECU Rear RH (Rear Door RH ECU) Connector
    G04021948Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the O2 and O3 ECU connectors.
    2. Measure the resistance and voltage of the wire harness side connectors.
      VOLTAGE AND RESISTANCE REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      GND (O3-1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      CPUB (O3-4) - GND (P3- 1) G - W-B CPUB power supply Always 10 to 14 V
      BDR (O3-6) - GND (O3-1) L - W-B BDR power supply Always 10 to 14 V
      SIG (O3-3) - GND (O3-1) L - W-B IG power supply Engine switch on (IG) 10 to 14 V
      TRG+ (O2-18) - GND (O3- 1) L - W-B Lock switch signal Lock switch not pushed 10 kΩ or higher
      TRG+ (O2-18) - GND (O3- 1) L - W-B Lock switch signal Lock switch pushed Below 1 Ω

      If the result is not as specified, the wire harness side may have a malfunction.

    3. Reconnect the O2 and O3 connectors.
    4. Measure the voltage of the connectors.
      VOLTAGE REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      OSCB (O2-7) - OSCE (O2-20) R - G Power source supply Always 10 to 14 V

      If the result is not as specified, the ECU may have a malfunction.

  7. CHECK NO.1 JUNCTION BLOCK ASSEMBLY (MULTIPLEX NETWORK REAR ECU) 
    Fig 7: Identifying No1 Junction Block Assembly (Multiplex Network Rear ECU)
    G04021949Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the LC and LF junction block connectors.
    2. Measure the resistance and voltage of the wire harness side connectors.
      VOLTAGE AND RESISTANCE REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      ECUB (LC-15) - Body ground B - Body ground +B Always 10 to 14 V
      PGND (LF-1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      SG (LC-3) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, the wire harness side may have a malfunction.

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