Toyota 4Runner: Terminals Of Ecm

Toyota 4Runner Service Manual / Drivetrain / A750e Automatic Transmission / Transaxle / Automatic Transmission System / Terminals Of Ecm

TERMINALS OF ECM

1. CHECK ECM

HINT:

The standard voltage at 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 inspect. The standard voltage between the terminals is shown under "Specified Condition".

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
B37-2 (NSW) - B38-12 (E1)	B - BR	PNP switch signal	Ignition switch ON Shift lever in P or N	Below 1 V
B37-2 (NSW) - B38-12 (E1)	B - BR	PNP switch signal	Ignition switch ON Shift lever not in P or N	11 to 14 V
B36-35 (P) - B38-12 (E1)	L - BR	P shift position switch signal	Ignition switch ON Shift lever in P	11 to 14 V
B36-35 (P) - B38-12 (E1)	L - BR	P shift position switch signal	Ignition switch ON Shift lever not in P	Below 1 V
B36-28 (R) - B38-12 (E1)	R - BR	R shift position switch signal	Ignition switch ON Shift lever in R	11 to 14 V
B36-28 (R) - B38-12 (E1)	R - BR	R shift position switch signal	Ignition switch ON Shift lever not in R	Below 1 V
B36-29 (N) - B38-12 (E1)	G - BR	N shift position switch signal	Ignition switch ON Shift lever in N	11 to 14 V
B36-29 (N) - B38-12 (E1)	G - BR	N shift position switch signal	Ignition switch ON Shift lever not in N	Below 1 V
B36-27 (D) - B38-12 (E1)	B - BR	D shift position switch signal	Ignition switch ON Shift lever in D	11 to 14 V
B36-27 (D) - B38-12 (E1)	B - BR	D shift position switch signal	Ignition switch ON Shift lever not in D	Below 1 V
F50-24 (S) - B38-12 (E1)	V - BR	S shift position switch signal	Ignition switch ON Shift lever in S	11 to 14 V
F50-24 (S) - B38-12 (E1)	V - BR	S shift position switch signal	Ignition switch ON Shift lever not in S	Below 1 V
F50-16 (SFTU) - B38-12 (E1)	GR - BR	Up-shift position switch signal	Ignition switch ON Shift lever in S	11 to 14 V
F50-16 (SFTU) - B38-12 (E1)	GR - BR	Up-shift position switch signal	Ignition switch ON Shift lever "+" (up-shift)	Below 1 V
F50-22 (SFTD) - B38-12 (E1)	LG - BR	Down-shift position switch signal	Ignition switch ON Shift lever in S	11 to 14 V
F50-22 (SFTD) - B38-12 (E1)	LG - BR	Down-shift position switch signal	Ignition switch ON Shift lever "-" (down-shift)	Below 1 V
B37-36 (S1) - B38-12 (E1)	L-R - BR	S1 solenoid signal	Ignition switch ON	11 to 14 V
			1st or 2nd gear	11 to 14 V
			3rd, 4th or 5th gear	Below 1 V
B36-33 (S2) - B38-12 (E1)	L-W - BR	S2 solenoid signal	Ignition switch ON	Below 1 V
			2nd or 3rd gear	11 to 14 V
			1st, 4th or 5th gear	Below 1 V
B36-31 (SR) - B38-12 (E1)	G-W - BR	SR solenoid signal	Ignition switch ON	Below 1 V
			5th gear	11 to 14 V
			1st gear	Below 1 V
B38-33 (SL1+) - B38-32 (SL1-)	V - R-B	SL1 solenoid signal	Engine idling	Pulse generation (See waveform 1)
B37-31 (SL2+) - B38-34 (SL2-)	LG - P-L	SL2 solenoid signal	Engine idling	Pulse generation (See waveform 2)
B37-34 (SLT+) - B37-35 (SLT-)	G-Y - L-B	SLT solenoid signal	Engine idling	Pulse generation (See waveform 3)
B37-33 (SLU+) - B37-32 (SLU-)	G-R - Y-R	SLU solenoid signal	4th gear (lock-up) or 5th gear (lock-up)	Pulse generation (See waveform 4)
B38-5 (THO1) - B37-8 (ETHW)	B-R - W-R	No. 1 ATF temperature sensor signal	No. 1 ATF temperature 115°C (239°F) or higher	Below 1.5 V
B38-11 (THO2) - B37-8 (ETHW)	L-Y - W-R	No. 2 ATF temperature sensor signal	No. 2 ATF temperature 115°C (239°F) or higher	Below 1.5 V
B38-9 (SP2+) - B38-10 (SP2-)	G - R	Speed sensor SP2 signal	Vehicle speed 20 km/h (12 mph)	Pulse generation (See waveform 5)
B38-3 (NT+) - B38-4 (NT-)	B - Y	Speed sensor NT signal	Engine idling (shift lever in P or N)	Pulse generation (See waveform 6)
F50-32 (CANH) - B38-12 (E1)	V - BR	CAN communication line	Ignition switch ON	Pulse generation (See waveform 7)
F50-31 (CANL) - B38-12 (E1)	W - BR	CAN communication line	Ignition switch ON	Pulse generation (See waveform 8)

(a) Using an oscilloscope, check waveform 1.

Reference

Terminal No. (Symbol)	Tool Setting	Condition
B38-33 (SL1+) - B38-32 (SL1-)	5 V/DIV., 1 msec./DIV.	Engine idling

(b) Using an oscilloscope, check waveform 2.

Reference

Terminal No. (Symbol)	Tool Setting	Condition
B37-31 (SL2+) - B38-34 (SL2-)	5 V/DIV., 1 msec./DIV.	Engine idling

Reference

Terminal No. (Symbol)	Tool Setting	Condition
B37-34 (SLT+) - B37-35 (SLT-)	5 V/DIV., 1 msec./DIV.	Engine idling

(d) Using an oscilloscope, check waveform 4.

Reference

Terminal No. (Symbol)	Tool Setting	Condition
B37-33 (SLU+) - B37-32 (SLU-)	5 V/DIV., 1 msec./DIV.	4th gear (lock-up) or 5th gear (lock-up)

(e) Using an oscilloscope, check waveform 5.

Reference

Terminal No. (Symbol)	Tool Setting	Condition
B38-9 (SP2+) - B38-10 (SP2-)	2 V/DIV., 20 msec./DIV.	Vehicle speed 20 km/h (12 mph)

(f) Using an oscilloscope, check waveform 6.

Reference

Terminal No. (Symbol)	Tool Setting	Condition
B38-3 (NT+) - B38-4 (NT-)	1 V/DIV., 2 msec./DIV.	Engine idling (shift lever in P or N)

(g) Using an oscilloscope, check waveform 7.

Reference

Terminal No. (Symbol)	Tool Setting	Condition
F50-32 (CANH) - B38-12 (E1)	1 V/DIV., 10 μsec./DIV.	Ignition switch ON

(h) Using an oscilloscope, check waveform 8.

Reference

Terminal No. (Symbol)	Tool Setting	Condition
F50-31 (CANL) - B38-12 (E1)	1 V/DIV., 10 μsec./DIV.	Ignition switch ON

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