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Terminals Of Ecu

  1. CHECK CERTIFICATION ECU 
    Fig 1: Identifying Certification ECU Connector Terminals
    G05311002Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the U28 ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      ECU TERMINAL REFERENCE CHART

      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 Power switch OFF Below 1 V
      IG (U28-18) - Body ground B - Body ground Ignition power supply Power 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.
      ECU TERMINAL REFERENCE CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      CLG1 (U28-33) - CG1B (U28-34) W - R Door electrical key oscillator (for front LH) sensor signal All doors closed, all doors locked and power switch OFF Alternating between 5 V and below 1 V
      CLG1 (U28-33) - CG1B (U28-34) W - R Door electrical key oscillator (for 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 Key close to door Below 1 V
      CLG2 (U28-35) - CG2B (U28-36) B - W Door electrical key oscillator (for front RH) sensor signal All doors closed, all doors locked and power switch OFF Alternating between 5 V and below 1 V
      CLG2 (U28-35) - CG2B (U28-36) B - W Door electrical key oscillator (for 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 Key close to door Below 1 V
      CLG3 (U33-8) - CG3B (U33-9) R - W Door electrical key oscillator (for rear LH) sensor signal All doors closed, all doors locked and power switch OFF Alternating between 5 V and below 1 V
      CLG3 (U33-8) - CG3B (U33-9) R - W Door electrical key oscillator (for 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 Key close to door Below 1 V
      CLG4 (U33-10) - CG4B (U33-11) B - Y Door electrical key oscillator (for rear RH) sensor signal All doors closed, all doors locked and power switch OFF Alternating between 5 V and below 1 V
      CLG4 (U33-10) - CG4B (U33-11) B - Y Door electrical key oscillator (for 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 Key close to door Below 1 V
      CLG5 (U28-11) - CG5B (U28-12) GR - BR Indoor electrical key antenna (for front) sensor signal 30 seconds after driver side door opened and closed, power switch OFF Alternating between 5 V and below 1 V
      CLG5 (U28-11) - CG5B (U28-12) GR - BR Indoor electrical key antenna (for front) sensor signal Within 30 seconds driver side door opened and closed, power switch OFF Below 1 V
      CLG6 (U28-13) - CG6B (U28-14) Y - L Indoor electrical key antenna (for rear) sensor signal 30 seconds after driver side door opened and closed, power switch OFF Alternating between 5 V and below 1 V
      CLG6 (U28-13) - CG6B (U28-14) Y - L Indoor electrical key antenna (for rear) sensor signal Within 30 seconds driver side door opened and closed, power switch OFF Below 1 V
      CLG7 (U28-15) - CG7B (U28-16) P - V Luggage electrical key antenna (for inner) sensor signal Luggage compartment door opening switch OFF Alternating between 5 V and below 1 V
      CLG7 (U28-15) - CG7B (U28-16) P - V Luggage electrical key antenna (for inner) sensor signal Luggage compartment door opening switch ON Below 1 V
      CLG8 (U28-31) - CG8B (U28-32) L - LG Luggage electrical key antenna (for outer) sensor signal Luggage compartment door opening switch OFF Alternating between 5 V and below 1 V
      CLG8 (U28-31) - CG8B (U28-32) L - LG Luggage electrical key antenna (for outer) sensor signal Luggage compartment door opening switch ON Below 1 V
      RCO (U28-29) - E (U28-17) P - W-B Door control receiver power source All doors closed, all doors locked and power switch OFF 0 to 6V
      RCO (U28-29) - E (U28-17) P - W-B Door control receiver power source Door unlocked or door open Below 1 V
      RSSI (U28-39) - E (U28-17) O - W-B Door control receiver electric wave existence signal All doors closed, all doors locked and power switch OFF 0 to 5 V
      RSSI (U28-39) - E (U28-17) O - W-B Door control receiver electric wave existence signal Door unlocked or door open Below 1 V
      RDA (U28-38) - E (U28-17) G - W-B Door control receiver data input signal All doors closed, all doors locked and power switch OFF Below 1 V
      RDA (U28-38) - E (U28-17) G - W-B 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 MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH) 
    Fig 2: Identifying Main Body ECU RH (Cowl Side Junction Block RH) Connector Terminals
    G05299221Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the DD, DK, DM and DN ECU connectors.
    2. Measure the voltage and resistance of the wire harness side connectors.
      ECU TERMINAL REFERENCE CHART

      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 ECU connectors.
    4. Measure the resistance of the connector.
      ECU TERMINAL REFERENCE CHART

      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 ECU may have a malfunction.

  3. CHECK FRONT MULTIPLEX NETWORK DOOR ECU LH (DRIVER DOOR ECU) 
    Fig 3: Identifying Front Multiplex Network Door ECU LH (Driver Door ECU) Connector Terminals
    G05311004Courtesy 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.
      ECU TERMINAL REFERENCE CHART

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

      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 FRONT MULTIPLEX NETWORK DOOR ECU RH (FRONT PASSENGER DOOR ECU) 
    Fig 4: Identifying Front Multiplex Network Door ECU RH (Front Passenger Door ECU) 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.
      ECU TERMINAL REFERENCE CHART

      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) LG - 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 Power 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.
      ECU TERMINAL REFERENCE CHART

      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 REAR MULTIPLEX NETWORK DOOR ECU LH (REAR DOOR LH ECU) 
    Fig 5: Identifying Rear Multiplex Network Door ECU LH (Rear Door LH ECU) 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.
      ECU TERMINAL REFERENCE CHART

      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 Power 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.
      ECU TERMINAL REFERENCE CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      OSCB (P3-7) - OSCE (P3-20) 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 REAR MULTIPLEX NETWORK DOOR ECU RH (REAR DOOR RH ECU) 
    Fig 6: Identifying Rear Multiplex Network Door ECU RH (Rear Door RH ECU) Connector Terminals
    G05311007Courtesy 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.
      ECU TERMINAL REFERENCE CHART

      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 (O3-1) 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 Power switch ON (IG) 10 to 14 V
      TRG+ (O2-18) -GND (O3-D L - W-B Lock switch signal Lock switch not pushed 10 kΩ or higher
      TRG+ (O2-18) - GND (O3-D 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.
      ECU TERMINAL REFERENCE CHART

      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 No. 1 Junction Block Assembly (Multiplex Network Rear ECU) Connector Terminals
    G05299226Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the LC and LF ECU connectors.
    2. Measure the resistance and voltage of the wire harness side connectors.
      ECU TERMINAL REFERENCE CHART

      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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