Terminals Of Ecu

Fig 1: Identifying K31 And F1 Connector Terminal

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1. Waveform 1 (Reference) : Using an oscilloscope
   ITEM CONDITION CHART
   
   

   Item	Condition
   Symbols (Terminal No.)	TACHO (K31-27) - Body ground
   Tool setting	5 V/DIV., 10 ms/DIV
   Vehicle condition	Engine idle speed

   Fig 2: Waveform (Reference) Oscilloscope Chart

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Waveform 2 (Reference) : Using an oscilloscope
   ITEM CONDITION CHART
   
   

   Item	Condition
   Symbols (Terminal No.)	4P (K31-9) - Body ground SPEED (K31-29) - Body ground
   Tool setting	5 V/DIV., 20 ms/DIV
   Vehicle condition	Driving at approx. 20 km/h (12 mph)

   Fig 3: Waveform (Reference) Oscilloscope Chart

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   HINT:

   As vehicle speed increases, the cycle of the signal waveform narrows.

   TELLTALE LIGHT ASSEMBLY 

   WIRE COLOR CONDITION DESCRIPTION
   
   

   Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
   TURN-L (f1-1) - Body ground	B - Body ground	Turn signal L	Engine switch on (IG), turn signal LH indicator light OFF	Below 1 V
   			Engine switch on (IG), turn signal LH indicator light ON	10 to 14 V
   TURN-R (f1-2) - Body ground	B - Body ground	Turn signal R	Engine switch on (IG), turn signal RH indicator light OFF	Below 1 V
   			Engine switch on (IG), turn signal RH indicator light ON	10 to 14 V
   DOME+B-L (f1-3) - Body ground	R- Body ground	Battery R	Always	10 to 14 V
   SLIP (f1-5) - Body ground	BR - Body ground	Slip signal	Engine switch on (IG), slip indicator is OFF	10 to 14 V
   			Engine switch on (IG), slip indicator is blinking	Below 1 V
   SEAT BELT (f1-6) - Body ground	Y - Body ground	Seat belt condition signal (Driver side)	Engine switch on (IG), driver seat belt indicator is OFF	10 to 14 V
   			Engine switch on (IG), driver seat belt indicator is blinks	Below 1 V
   AIRBAG (f1-7) - Body ground	O - Body ground	Airbag signal	Engine switch on (IG), airbag indicator is OFF	10 to 14 V
   			Engine switch on (IG), airbag indicator is blinking	Below 1 V
   BEAM (f1-8) - Body ground	Y - Body ground	BEAM signal	BEAM switch OFF	10 to 14 V
   			BEAM switch ON	Below 1 V
   IG-L (f1-10) - Body ground	L - Body ground	Engine switch signal R	Engine switch off	Below 1 V
   			Engine switch on (IG)	10 to 14 V
   IG-R (f1-11) - Body ground	R - Body ground	Engine switch signal L	Engine switch off	Below 1 V
   			Engine switch on (IG)	10 to 14 V
   DOME+B-R (f1-12) - Body ground	L - Body ground	Battery L	Always	10 to 14 V
   FR FOG (f1-14) - Body ground	O - Body ground	Fr fog signal	Fr Fog switch OFF	10 to 14 V
   			Fr Fog switch ON	Below 1 V
   DOOR (f1-15) - Body ground	BR - Body ground	Door courtesy switch signal	Door indicator OFF	10 to 14 V
   			Door indicator ON	Below 1 V
   TAIL (f1-16) - Body ground	G - Body ground	Tail signal	Tail signal switch OFF	10 to 14 V
   			Tail signal switch ON	Below 1 V
   TURN L-G (f1-17) - Body ground	W- Body ground	Ground	Always	Below 1 Ω
   TURN R-G (f1-18) - Body ground	W- Body ground	Ground	Always	Below 1 Ω

Fig 4: Identifying (3UZ-FE, A13) And (3GR-FS, A44) Connector Terminal

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3UZ-FE 

3GR-FSE 

1. Waveform 2 (Reference) : Using an oscilloscope
   ITEM CONDITION CHART
   
   

   Item	Condition
   Symbols (Terminal No.)	SP1 (A13-7) - Body ground SP1 (A44-12) - Body ground
   Tool setting	5 V/DIV., 20 ms/DIV
   Vehicle condition	Driving at approx. 20 km/h (12 mph)

   Fig 5: Waveform (Reference) Oscilloscope Chart

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 6: Identifying A7 Connector Terminal

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1. Waveform 1 (Reference) : Using an oscilloscope
   WIRE COLOR CONDITION DESCRIPTION
   
   

   Item	Condition
   Symbols (Terminal No.)	TACHO (A7-16) - Body ground
   Tool setting	5 V/DIV., 20 ms/DIV
   Vehicle condition	Driving at approx. 20 km/h (12 mph)

   Fig 7: Waveform (Reference) Oscilloscope Chart

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 8: Combination Meter Inner - Wiring Diagram (1 Of 2)

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Fig 9: Combination Meter Inner - Wiring Diagram (2 Of 2)

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This diagram shows all the indicators that are provided, which may differ from the actual vehicle.