Terminals Of Ecu

Fig 1: Inspecting Theft Warning ECU

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• Disconnect the T7 ECU connector, and check the voltage or continuity between each terminal of the wire harness side connector.

  Standard: 

  WIRING SPECIFICATION
  
  

  Symbols (Terminal No.)	Wiring Color	Condition	Specified Condition
  GND(T7-20) <--> Body ground	W-B <--> -	Constant	Continuity
  +B2(T7-21) <--> GND (T7-20)	B-O <--> W-B	Constant	10-14V
  IG (T7-24) <--> GND(T7-20)	V-W<-->W-B	Ignition switch OFF --> ON	0V --> 10-14V
  +B(T7-1) <--> GND (17-20)	L-O <--> W-B	Constant	10-14V

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

• Reconnect the T7 ECU connector, and check the voltage between each terminal of the connector.

  Standard: 

  WIRING SPECIFICATION
  
  

  Symbols (Terminal No.)	Wiring Color	Condition	Specified Condition
  IND (T7-3) <--> GND (T7-20)	B <--> W-B	Security indicator light does not light up.	0V

If the result is not as specified, the T7 ECU may malfunction.

Fig 2: Inspecting Transponder Key ECU

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the T13 ECU connector, and check the voltage or continuity between each terminal of the wire harness side connector.

   Standard: 

   WIRING SPECIFICATION
   
   

   Symbols (Terminal No.)	Wiring Color	Condition	Specified Condition
   GND(T13-14) <--> Body ground	W-B <--> -	Constant	Continuity
   CPUB(T13-1) <-->GND(T13-14)	L-O <--> W-B	Constant	10-14V
   IG2(T13-2) <--> GND(T13-14)	G-B <--> W-B	Ignition switch OFF --> ON	0V-10-14V
   KSW(T13-3) <--> <--> GND(T13-14)	LG-B <--> W-B	No key in the ignition key cylinder --> With key	No continuity --> Continuity

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

2. Reconnect the T13 ECU connector, and check the voltage between each terminal of the connector.

   Standard: 

   WIRING SPECIFICATION
   
   

   Symbols (Terminal No.)	Wiring Color	Condition	Specified Condition
   KSW(T13-3) <--> GND(T13-14)	LG-B <--> W-B	No key in the ignition key cylinder -->With key	10-14V --> 0V
   VC12(T13-9) <--> GND(T13-14)	Y <--> W-B	Ignition switch OFF --> ON	0V --> 10-14V
   TXCT(T13-12) <-->GND(T13-14)	G <--> W-B	Ignition switch OFF --> ON	Waveform 1
   CODE (T13-10) <--> GND(T13-14)	V-W <--> W-B	Ignition switch OFF -->ON	Waveform 2
   RXCK(T13-11) <--> GND(T13-14)	R <--> W-B	Ignition switch OFF --> ON	Waveform 3
   EFIO(T13-6) <-->GND(T13-14)	B-R <--> W-B	Ignition switch OFF --> ON	Waveform 4
   EFII(T13-7) <--> GND(T13-14)	W-L <--> W-B	Ignition switch OFF -->ON	Waveform 5

3. Inspection using on oscilloscope.

   Reference: 

   1. Waveform 1
      ITEM SPECIFICATION
      
      

      Item	Condition
      Terminal	TXCT-GND
      Tool setting	5V/DIV,20ms/DIV
      Vehicle condition	Ignition switch ON

      Fig 3: Identifying Oscilloscope Graph (1 Of 5)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Reference: 

   2. Waveform 2
      ITEM SPECIFICATION
      
      

      Item	Condition
      Terminal	CODE-GND
      Tool setting	10V/DIV,20ms/DIV
      Vehicle condition	Ignition switch ON

      Fig 4: Identifying Oscilloscope Graph (2 Of 5)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Reference: 

   3. Waveform 3
      ITEM SPECIFICATION
      
      

      Item	Condition
      Terminal	RXCK-GND
      Tool setting	10 V/DIV, 20 ms/DIV
      Vehicle condition	Ignition switch ON

      Fig 5: Identifying Oscilloscope Graph (3 Of 5)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Reference: 

   4. Waveform 4
      ITEM SPECIFICATION
      
      

      Item	Condition
      Terminal	EFIO-GND
      Tool setting	5 V/DIV, 5 ms/DIV
      Vehicle condition	Ignition switch ON

      Fig 6: Identifying Oscilloscope Graph (4 Of 5)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Reference: 

   5. Waveform 5
      ITEM SPECIFICATION
      
      

      Item	Condition
      Terminal	EFII - GND
      Tool setting	5 V/DIV, 5 ms/DIV
      Vehicle condition	Constant

      Fig 7: Identifying Oscilloscope Graph (5 Of 5)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the result is not as specified, the T13 ECU may malfunction.

Fig 8: Inspecting ECM

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the E3, E5 and E6 ECU connectors, and check the voltage or continuity between each terminal of the wire harness side connectors.

   Standard: 

   WIRING SPECIFICATION
   
   

   Symbols (Terminal No.)	Wiring Color	Condition	Specified Condition
   BATT(E6-4) <--> El (E3-7)	B <--> BR	Constant	9-14V
   +B (E6-6) <--> El (E3-7)	B-W <--> BR	Ignition switch OFF --> ON	9-14V
   +B1 (E6-5) <--> El (E3-7)	B-W <--> BR	Ignition switch OFF --> ON	9-14V
   IGSW (E6-17) <--> El (E3-7)	G-B <--> BR	Ignition switch OFF --> ON	9-14V
   IMI (E5-24) <--> El (E3-7)	B-R <--> BR	No key in the ignition key cylinder --> With key	Waveform 1
   IMO (E5-23) EI (E3-7)	W-L <--> BR	No key in the ignition key cylinder --> With key	Waveform 2
   EI(E3-7) <--> Body ground	BR <--> -	Constant	Continuity

2. Inspection using an oscilloscope.

   Reference: 

   1. Waveform 4
      ITEM SPECIFICATION
      
      

      Item	Condition
      Terminal	IMI-GND
      Tool setting	5V/DIV, 5 ms/DIV
      Vehicle condition	Ignition switch ON

      Fig 9: Inspecting Oscilloscope Graph (1 Of 2)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Reference: 

   2. Waveform 5
      ITEM SPECIFICATION
      
      

      Item	Condition
      Terminal	IMO-GND
      Tool setting	5V/DIV, 5 ms/DIV
      Vehicle condition	Constant

      Fig 10: Inspecting Oscilloscope Graph (2 Of 2)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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