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Terminals Of Ecu

  1. CHECK CERTIFICATION ECU 
    Fig 1: Identifying U28 And U33 ECU Certification Connector Terminals
    G05299220Courtesy 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 SPECIFICATION

      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 SPECIFICATION

      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 1 V
      CLG1 (U28-33) - CG1B (U28-34) W - R Door electrical key oscillator (front LH) sensor signal Door unlocked or door open Below 1 V
      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 1 V
      CLG2 (U28-35) - CG2B (U28-36) B - W Door electrical key oscillator (front RH) sensor signal Door unlocked or door open Below 1 V
      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 1 V
      CLG3 (U33-8) - CG3B (U28-9) R - W Door electrical key oscillator (rear LH) sensor signal Door unlocked or door open Below 1 V
      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 1 V
      CLG4 (U33-10) - CG4B (U33-11) B - Y Door electrical key oscillator (rear RH) sensor signal Door unlocked or door open Below 1 V
      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 1 V
      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 1 V
      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 1 V
      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 1 V
      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 1 V
      CLG7 (U28-15) - CG7B (U28-16) P - V Luggage electrical key oscillator (inner) sensor signal Luggage compartment door opening switch ON Below 1 V
      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 1 V
      CLG8 (U28-31) - CG7B (U28-32) L - LG Luggage electrical key oscillator (outer) sensor signal Luggage compartment door opening switch ON Below 1 V
      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 6V
      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 5V
      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 DD, DK, DM And DN Junction Block Connector Terminals
    G05299221Courtesy 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 SPECIFICATION

      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 SPECIFICATION

      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 N4 And N3 Connector Terminals
    G05299222Courtesy 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 SPECIFICATION

      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 SPECIFICATION

      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 M3 And M4 Connector Terminals
    G05299223Courtesy 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 SPECIFICATION

      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 SPECIFICATION

      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 P3 And P2 Connector Terminals
    G05299224Courtesy 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 SPECIFICATION

      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 SPECIFICATION

      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 O2 And O3 ECU Connector Terminals
    G05299225Courtesy 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 SPECIFICATION

      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 SPECIFICATION

      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 LC And LF Junction Block Connector Terminals
    G05299226Courtesy 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 SPECIFICATION

      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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