Terminals Of ECM

WARNING: This page is about a different car, the 2008 Toyota Yaris. However, it is still accessible from the selected car via links, so may be relevant.

ECM

Fig 1: Identifying ECM Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

Each ECM terminal's standard voltage is shown in the table below.

In the table, first follow the information under "Condition".

Look under "Symbols (Terminal No.)" for the terminals to be inspected. The standard voltage between the terminals is shown under "Specific Condition".

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

CONNECTOR TERMINAL REFERENCE

Symbols (Terminals No.)	Wiring Color	Terminal Description	Condition	Specified Condition
L (C20-74) - E1 (C20-104)	V - W	L shift position switch signal	Ignition switch ON and shift lever L position	11 to 14 V
L (C20-74) - E1 (C20-104)	V - W	L shift position switch signal	Ignition switch ON and shift lever other than L position	Below 1 V
2 (C20-55) - E1 (C20-104)	G - W	2 shift position switch signal	Ignition switch ON and shift lever 2 position	11 to 14 V
2 (C20-55) - E1 (C20-104)	G - W	2 shift position switch signal	Ignition switch ON and shift lever other than 2 position	Below 1 V
ODMS (A21-26) - E1 (C20-104)	O - W	3 shift position switch signal	Ignition switch ON and shift lever 3 position	11 to 14 V
ODMS (A21-26) - E1 (C20-104)	O - W	3 shift position switch signal	Ignition switch ON and shift lever other than 3 position	Below 1 V
D (C20-56) - E1 (C20-104)	L - W	D shift position switch signal	Ignition switch ON and shift lever D or 3 position	11 to 14 V
D (C20-56) - E1 (C20-104)	L - W	D shift position switch signal	Ignition switch ON and shift lever other than D and 3 positions	Below 1 V
R (C20-53) - E1 (C20-104)	R - W	R shift position switch signal	Ignition switch ON and shift lever R position	11 to 14 V
R (C20-53) - E1 (C20-104)	R - W	R shift position switch signal	Ignition switch ON and shift lever other than R position	Below 1 V
N (C20-54) - E1 (C20-104)	SB - W	N shift position switch signal	Ignition switch ON and shift lever N position	11 to 14 V
N (C20-54) - E1 (C20-104)	SB - W	N shift position switch signal	Ignition switch ON and shift lever other than N position	Below 1 V
P (C20-73) - E1 (C20-104)	R - W	P shift position switch signal	Ignition switch ON and shift lever P position	11 to 14 V
P (C20-73) - E1 (C20-104)	R - W	P shift position switch signal	Ignition switch ON and shift lever other than P position	Below 1 V
NT+ (C20-125) - NT- (C20-124)	B-G	Speed sensor (NT) signal	Engine running	Pulse generation (see awaveform 1)
STP (A21-36) - E1 (C20-104)	G - W	Stop light switch signal	Brake pedal depressed	7.5 to 14 V
STP (A21-36) - E1 (C20-104)	G - W	Stop light switch signal	Brake pedal released	Below 1.5 V
SPD (A21-8) - E1 (C20-104)	V - W	Speed signal	Ignition switch ON and driving wheel rotating slowly	Pulse generation (see bwaveform 2)
S1 (C20-79) - E1 (C20-104)	SB - W	S1 solenoid signal	Ignition switch ON	11 to 14 V
			1st or 2nd gear	11 to 14 V
			3rd or 4th gear	Below 1 V
S2 (C20-78) - E1 (C20-104)	L - W	S2 solenoid signal	Ignition switch ON	Below 1 V
			1st or 4th gear	11 to 14 V
			2nd or 3rd gear	Below 1 V
ST (C20-80) - E1 (C20-104)	GR - W	ST solenoid signal	D position (3rd gear ↔ 4th gear)	Below 1 V ↔ 11 to 14 V
SLT+ (C20-76) - SLT-(C20-75)	G - W	SLT solenoid signal	Engine idling speed	Pulse generation (see cwaveform 3)
SLU+ (C20-57) - SLU-(C20-77)	P - O	SLU solenoid signal	Engine idling speed	Pulse generation (see dwaveform 4)
THO1 (C20-72) - ETHO (C20-95)	Y - B	ATF (Automatic Transmission Fluid) temperature sensor signal	ATF temperature: 10°C (50°F) to 145°C (293°F)	4 to 0 V

Waveform 1

WAVEFORM REFERENCE (1)

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

Fig 2: Identifying Waveform 1

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Waveform 2

WAVEFORM REFERENCE (2)

Terminal	SPD - E1
Tool setting	2 V/DIV, 20 ms/DIV
Vehicle conditions	Driving at approximately 12 mph (20 km/h)

Fig 3: Identifying Waveform 2

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Waveform 3

WAVEFORM REFERENCE (3)

Terminal	SLT+ - SLT-
Tool setting	5 V/DIV, 1 ms/DIV
Vehicle conditions	Engine idling speed

Fig 4: Identifying Waveform 3

Waveform 4

WAVEFORM REFERENCE (4)

Terminal	SLU+ - SLU-
Tool setting	5 V/DIV, 1 ms/DIV
Vehicle conditions	Engine idling speed

Fig 5: Identifying Waveform 4