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Terminals Of Ecu

  1. CHECK POWER SOURCE CONTROL ECU 
    Fig 1: Identifying Power Source Control ECU Connector
    G04473180Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the P6 ECU connector.
    2. Measure the resistance and voltage of the wire harness side connector.
      TERMINAL CONDITION SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      AM1 (P6-33) - Body ground R - Body ground +B power supply Always 10 to 14 V
      AM2 (P6-12) - Body ground W - Body ground +B power supply Always 10 to 14 V
      CDSW (P6-25) - Body ground L - Body ground Key condition No key in key slot Below 1 Ω
      CDSW (P6-25) - Body ground L - Body ground Key condition Key inserted 10 kΩ or higher
      SSW1 (P6-14) - Body ground B - Body ground Power switch signal Power switch pushed Below 1 Ω
      SSW1 (P6-14) - Body ground B - Body ground Power switch signal Power switch not pushed 10 kΩ or higher
      SSW2 (P6-37) - Body ground Y - Body ground Power switch signal Power switch pushed Below 1 Ω
      SSW2 (P6-37) - Body ground Y - Body ground Power switch signal Power switch not pushed 10 kΩ or higher
      GND2 (P6-6) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    3. Reconnect the P6 ECU connector.
    4. Measure the resistance and voltage of the connector.
      TERMINAL CONDITION SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      SOL1 (P6-3) - GND2 (P6-6) P - W-B Power switch signal Brake pedal is not depressed, power switch ON (ACC) 0 V
      SOL1 (P6-3) - GND2 (P6-6) P - W-B Power switch signal Brake pedal is not depressed, power switch ON (IG) 10 to 14 V
      SOL2 (P6-20) - GND2 (P6-6) GR - W-B Power switch signal Always Below 1 Ω
      ACCD (P6-11) - GND2 (P6-6) G - W-B ACC signal Power switch OFF 0 V
      ACCD (P6-11) - GND2 (P6-6) G - W-B ACC signal Power switch ON (ACC) 10 to 14 V
      IG1D (P6-34) - GND2 (P6-6) B - W-B IG1 signal Power switch ON (ACC) 0 V
      IG1D (P6-34) - GND2 (P6-6) B - W-B IG1 signal Power switch ON (IG) 10 to 14 V
      IG2D (P6-35) - GND2 (P6-6) V - W-B IG2 signal Power switch ON (ACC) 0 V
      IG2D (P6-35) - GND2 (P6-6) V - W-B IG2 signal Power switch ON (IG) 10 to 14 V
      STP (P6-1) - GND2 (P6-6) L - W-B Stop light signal Brake pedal depressed 10 to 14 V
      STP (P6-1) - GND2 (P6-6) L - W-B Stop light signal Brake pedal released 0 V

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

  2. CHECK TRANSPONDER KEY ECU 
    Fig 2: Identifying Transponder Key ECU Connector
    G04473181Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the T5 ECU connector.
    2. Measure the resistance and voltage of the wire harness side connector.
      TERMINAL CONDITION SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      CPUB (T5-3) - GND (T5-22) L - W-B Battery Always 10 to 14 V
      IG (T5-4) - GND (T5-22) O - W-B Power switch (IG) Power switch OFF 0 V
      IG (T5-4) - GND (T5-22) O - W-B Power switch (IG) Power switch ON (IG) 10 to 14 V
      ACC (T5-12) - GND (T5-22) P - W-B Power switch (ACC) Power switch OFF 0 V
      ACC (T5-12) - GND (T5-22) P - W-B Power switch (ACC) Power switch ON (ACC) 10 to 14 V
      CUWS (T5-5) - GND (T5-22) B - W-B Halfway switch No key in key slot 10 kΩ or higher
      CUWS (T5-5) - GND (T5-22) B - W-B Halfway switch Key inserted Below 1 Ω
      AGND (T5-7) - GND (T5-22) P - W-B Ground Always Below 1 Ω
      GND (T5-22) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    3. Reconnect the T5 ECU connector.
    4. Measure the voltage of the connector.
      TERMINAL CONDITION SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      CUWS (T5-5) - GND (T5-22) B - W-B Halfway switch No key in key slot 10 to 14 V
      CUWS (T5-5) - GND (T5-22) B - W-B Halfway switch Key inserted Below 1 V
      VC5 (T5-20) - GND (T5-22) Y - W-B Power source No key in key slot 0 V
      VC5 (T5-20) - GND (T5-22) Y - W-B Power source Key inserted 4.6 to 5.4 V

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

  3. CHECK HYBRID VEHICLE CONTROL ECU 
    Fig 3: Identifying Hybrid Vehicle Control ECU Connector
    G04473182Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the H14, H15, H16 and H17 ECU connectors.
    2. Measure the resistance and voltage of the connectors.
      TERMINAL CONDITION SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      ST2 (H14-5) - GND1 (H14-1) Y - W-B Ignition start control signal input Power switch ON (READY) 10 to 14 V
      IGSW (H14-7) - GND1 (H14-1) O - W-B Ignition ready control signal input Power switch ON (IG) 10 to 14 V
      BATT (H15-6) - GND1 (H14-1) Y - W-B Battery Always 10 to 14 V
      +B1 (H16-7) - GND1 (H14-1) L - W-B Ignition power supply Power switch ON (IG) 10 to 14 V
      +B2 (H16-6) - GND1 (H14-1) L - W-B Ignition power supply Power switch ON (IG) 10 to 14 V
      GND1 (H14-1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      GND2 (H14-4) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

  4. CHECK TRANSMISSION CONTROL ECU 
    Fig 4: Identifying Transmission Control ECU Connector
    G04473183Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the T4 ECU connector.
    2. Measure the resistance and voltage of the wire harness side connector.
      TERMINAL CONDITION SPECIFICATION

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      BATT (T4-13) - Body ground L - Body ground +B power supply Always 10 to 14 V
      +B (T4-1) - Body ground L - Body ground Ignition power supply Power switch ON (IG) 10 to 14 V
      E1 (T4-15) - Body ground W-B - Body ground Ground Always Below 1 Ω
      E01 (T4-3) - Body ground W-B - Body ground Ground Always Below 1 Ω
      E02 (T4-2) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

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