Terminals Of ECM

ECM:

Fig 1: Identifying ECM Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

SYMBOLS SPECIFICATION

Symbols (Terminals No.)	Wiring Color	Condition	STD Voltage (V)
E5-4 <--> E3-7 (STP <--> E1)	G-R <--> BR	Brake pedal released (Stop light switch OFF)	Below 1 V
E5-4 <--> E3-7 (STP <--> E1)	G-R <--> BR	Brake pedal pushed (Stop light switch ON)	7.5-14 V
E5-31 <--> E3-7 (CCS <--> E1)	R <--> BR	Ignition switch ON CANCEL switch ON SET/COAST switch ON RES/ ACC switch ON	10-16V 6.9-9.8 V 4.7-6.9 V 2.4-3.8 V
E6-8 <--> E3-7 (ST1- <--> E1)	Y-G <--> BR	Brake pedal pushed (Stop light switch ON)	Below 1 V
E6-8 <--> E3-7 (ST1- <--> E1)	Y-G <--> BR	Brake pedal released (Stop light switch OFF)	7.5-14V
E3-7 <--> Body ground (E1 <--> Body ground)	BR <--> Body ground	Always	Below 1 V
E3-22 <--> E3-23 (SP2- <--> SP2+)	R <--> G	Vehicle is driving	Pulse generation*1

Oscilloscope wave *1

HINT:

Fig 2: Identifying Oscilloscope Wave

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Driver Side J/B ECU:

Fig 3: Identifying Driver Side J/B ECU Connector Terminals

SYMBOLS SPECIFICATION

Terminals No. (Symbols)	Wiring Color	Condition	STD Voltage (V)
3 <==> 6 (IG <==> GND)	-	Ignition switch ON	10-14V
4 <==> 6 (ACC <==> GND)	-	Ignition switch ACC	10-14V
6 <==> Body ground (GND <==> Body ground)	-	Always	Below 1 V
D2-12 <==> 6 (STPO <==> GND)	G-R <==> -	Brake pedal released (Stop light switch OFF)	Below 1 V
D2-12 <==> 6 (STPO <==> GND)	G-R <==> -	Brake pedal pushed (Stop light switch ON)	7.5-14 V
D2-13 <==> 6 (STPI <==> GND)	G-W <==> -	Brake pedal pushed (Stop light switch ON)	7.5-14 V
D2-13 <==> 6 (STPI <==> GND)	G-W <==> -	Brake pedal released (Stop light switch OFF)	Below 1 V

If the value is not within the standard range, some defects on the vehicle is suspected.