Toyota 4Runner manuals

Toyota 4Runner: 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

  • 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

  • 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

  • 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

  • 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

  • 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

  • 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

  • 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

  • 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

(c) Using an oscilloscope, check waveform 3.

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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