Automatic Transaxle System (For Hatchback) Terminals Of Ecm

Drivetrain. Yaris. Ncp93, 131

U340E Automatic Transmission Transaxle. Yaris. Ncp93, 131

1. ECM

Automatic Transaxle System (For Hatchback) -- Terminals Of Ecm

ECM

HINT:

The standard voltage and resistance of each ECM terminal is shown in the table below.

In the table, first follow the information under "Condition". Look under "Terminal No. (Symbol) " for the terminals to be inspected. The standard voltage and resistance between the terminals is shown under "Specific Condition".

Use the illustration above as a reference for the ECM terminals.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
A72-1 (BATT) - C51-16 (E1)	Y - W-B	Battery (for measuring battery voltage and for ECM memory)	Always	11 to 14 V
A72-2 (+B) - C51-16 (E1)	B - W-B	Power source of ECM	Ignition switch ON	11 to 14 V
A72-3 (+B2) - C51-16 (E1)	L - W-B	Power source of ECM	Ignition switch ON	11 to 14 V
A72-13 (CANH) - C51-16 (E1)	L - W-B	CAN communication line	Ignition switch ON	Pulse generation (See waveform 1)
A72-26 (CANL) - C51-16 (E1)	W - W-B	CAN communication line	Ignition switch ON	Pulse generation (See waveform 2)
A72-58 (3) - C51-16 (E1)	BE - W-B	3 shift position switch signal	Ignition switch ON and shift lever in 3	11 to 14 V
			Ignition switch ON and shift lever not in 3	Below 1 V
C51-16 (E1) - Body ground	W-B	Ground	Always	Below 1 Ω
C51-48 (SLU+) - C51-47 (SLU-)	V - R	Shift solenoid valve SLU signal	Engine idling speed	Pulse generation
C51-63 (NSW) - C51-16 (E1)	BE - W-B	Park/Neutral position switch signal	Ignition switch ON and shift lever in P or N	Below 1 V
			Ignition switch ON and shift lever not in P and N	11 to 14 V
C51-69 (S2) - C51-16 (E1)	L - W-B	Shift solenoid valve S2 signal	Ignition switch ON	Below 1 V
			1st or 4th gear	11 to 14 V
			2nd or 3rd gear	Below 1 V
C51-70 (S1) - C51-16 (E1)	R - W-B	Shift solenoid valve S1 signal	Ignition switch ON	11 to 14 V
			1st or 2nd gear	11 to 14 V
			3rd or 4th gear	Below 1 V
C51-71 (ST) - C51-16 (E1)	GR - W-B	Shift solenoid valve ST signal	Shift lever in D (3rd gear ←→ 4th gear)	Below 1 V ←→ 11 to 14 V
C51-73 (SLT+) - C51-72 (SLT-)	P - L	Shift solenoid valve SLTsignal	Engine idling speed	Pulse generation
C51-79 (R) - C51-16 (E1)	R - W-B	R shift position switch signal	Ignition switch ON and shift lever in R	11 to 14 V
			Ignition switch ON and shift lever not in R	Below 1 V
C51-81 (D) - C51-16 (E1)	L - W-B	D shift position switch signal	Ignition switch ON and shift lever in D or 3	11 to 14 V
			Ignition switch ON and shift lever not in D and 3	Below 1 V
C51-95 (THO1) - C51-96 (ETHO)	Y - B	ATF (Automatic Transmission Fluid) temperature sensor signal	ATF temperature: 10°C (50°F) to 145°C (293°F)	4 to 0 V
C51-97 (N) - C51-16 (E1)	V - W-B	N shift position switch signal	Ignition switch ON and shift lever in N	11 to 14 V
			Ignition switch ON and shift lever not in N	Below 1 V
C51-98 (L) - C51-16 (E1)	V - W-B	L shift position switch signal	Ignition switch ON and shift lever in L	11 to 14 V
			Ignition switch ON and shift lever not in L	Below 1 V
C51-99 (P) - C51-16 (E1)	P - W-B	P shift position switch signal	Ignition switch ON and shift lever in P	11 to 14 V
			Ignition switch ON and shift lever not in P	Below 1 V
C51-127 (NT+) - C51-128 (NT-)	L - G	Transmission revolution sensor (NT) signal	Driving at approximately 20 km/h (12 mph)	Pulse generation (See waveform 3)
C51-131 (2) - C51-16 (E1)	LG - W-B	2 shift position switch signal	Ignition switch ON and shift lever in 2	11 to 14 V
			Ignition switch ON and shift lever not in 2	Below 1 V

1. Waveform 1
   

   Terminal	CANH - E1
   Tool setting	1 V/DIV, 10 μs/DIV
   Vehicle conditions	Ignition switch ON





2. Waveform 2
   

   Terminal	CANL - E1
   Tool setting	1 V/DIV, 10 μs/DIV
   Vehicle conditions	Ignition switch ON





3. Waveform 3
   

   Terminal	NT+ - NT-
   Tool setting	2 V/DIV, 1 ms/DIV
   Vehicle conditions	Driving at approximately 20 km/h (12 mph)