Terminals Of ECM

WARNING: This page is about a different variant/trim than selected.

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

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

TERMINAL REFERENCE CHART

Terminal No. (Symbols)	Terminal Description	Condition	Specified Condition
A50-36 (STP) - B31-104 (E1)	Stop light switch signal	Brake pedal is depressed	7.5 to 14 V
A50-36 (STP) - B31-104 (E1)	Stop light switch signal	Brake pedal is released	Below 1.5 V
B31-52 (STAR) - B31-104 (E1)	Park neutral switch signal	Ignition switch ON and shift lever P and N position	Below 2 V
B31-52 (STAR) - B31-104 (E1)	Park neutral switch signal	Ignition switch ON and shift lever except P and N position	11 to 14 V
B31-73 (P) - B31-104 (E1)	Park position switch signal	Ignition switch ON and shift lever P position	11 to 14 V
B31-73 (P) - B31-104 (E1)	Park position switch signal	Ignition switch ON and shift lever except P position	Below 1 V
B31-53 (R) - B31-104 (E1)	R shift position switch signal	Ignition switch ON and shift lever R position	11 to 14 V
B31-53 (R) - B31-104 (E1)	R shift position switch signal	Ignition switch ON and shift lever except R position	Below 1 V
B31-54 (N) - B31-104 (E1)	Neutral position switch signal	Ignition switch ON and shift lever N position	11 to 14 V
B31-54 (N) - B31-104 (E1)	Neutral position switch signal	Ignition switch ON and shift lever except N position	Below 1 V
B31-56 (D) - B31-104 (E1)	D shift position switch signal	Ignition switch ON and shift lever D and 3 position	11 to 14 V
B31-56 (D) - B31-104 (E1)	D shift position switch signal	Ignition switch ON and shift lever except D and 3 position	Below 1 V
A50-26 (3) - B31-104 (E1)	3 shift position switch signal	Ignition switch ON and shift lever 3 position	11 to 14 V
A50-26 (3) - B31-104 (E1)	3 shift position switch signal	Ignition switch ON and shift lever except 3 position	Below 1 V
B31-55 (2) - B31-104 (E1)	2 shift position switch signal	Ignition switch ON and shift lever 2 position	11 to 14 V
B31-55 (2) - B31-104 (E1)	2 shift position switch signal	Ignition switch ON and shift lever except 2 position	Below 1 V
B31-74 (L) - B31-104 (E1)	L shift position switch signal	Ignition switch ON and shift lever L position	11 to 14 V
B31-74 (L) - B31-104 (E1)	L shift position switch signal	Ignition switch ON and shift lever except L position	Below 1 V
B31-79 (S1) - B31-104 (E1)	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
B31-78 (S2) - B31-104 (E1)	S2 solenoid signal	Ignition switch ON	11 to 14 V
		1st or 4th gear	11 to 14 V
		2nd or 3rd gear	Below 1 V
B31-57 (SLU+) - B31-77 (SLU-)	SLU solenoid signal	Ignition switch ON	Below 1 V
B31-80 (ST) - B31-104 (E1)	ST solenoid signal	Ignition switch ON	Below 1 V
B31-80 (ST) - B31-104 (E1)	ST solenoid signal	Ignition switch ON and R gear	11 to 14 V
B31-40 (SLT+) - B31-39 (SLT-)	SLT solenoid signal	Ignition switch ON	Pulse generation (See awaveform 1)
B31-125 (NT+) - B31-124 (NT-)	Speed sensor (NT) signal	Engine is running	Pulse generation (See bwaveform 2)
B31-72 (THO1) - B31-95 (ETHO)	ATF temperature sensor signal	ATF temperature: 115°C (239°F) or more	Below 1.5 V

Waveform 1

Reference:

TERMINAL REFERENCE CHART

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

Fig 2: Oscilloscope Waveform Reference Graph 1

Waveform 2

Reference:

TERMINAL REFERENCE CHART

Terminal	NT+ - NT-
Tool setting	5 V/DIV, 0.5 ms/DIV
Vehicle condition	Vehicle speed 20 km/h (12 mph)

Fig 3: Oscilloscope Waveform Reference Graph 2