Last Modified: 11-29-2007 1.6 U
Service Category: Drivetrain Section: Automatic Transmission/Transaxle
Model Year: 2008 Model: Sequoia Doc ID: RM000000W74077X
Title: AB60F AUTOMATIC TRANSMISSION / TRANSAXLE: AUTOMATIC TRANSMISSION SYSTEM: TERMINALS OF ECM (2008 Sequoia)

TERMINALS OF ECM

1. CHECK ECM



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. (Symbol)" for the terminals to be inspected. 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

A27-21 (L4) - D56-81 (E1)

Y - BR

4L position signal
  • Ignition switch ON
  • Transfer position switch on 4L

Below 1.5 V
  • Ignition switch ON
  • Transfer position switch not on 4L

11 to 14 V

A27-5 (TFN) - D56-81 (E1)

G - BR

N shift position switch signal
  • Ignition switch ON
  • Transfer position in neutral

Below 1.5 V
  • Ignition switch ON
  • Transfer position not in neutral

11 to 14 V

D56-120 (NSW) - D56-81 (E1)

L - 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

D56-2 (P) - D56-81 (E1)

G-B - 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

D56-26 (R) - D56-81 (E1)

L-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

D56-25 (N) - D56-81 (E1)

G-W - 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

D56-27 (D) - D56-81 (E1)

G - 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

A27-25 (S) - D56-81 (E1)

Y - 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

A27-38 (SFTU) - D56-81 (E1)

G - BR

Up-shift shift position switch signal
  • Ignition switch ON
  • Shift lever in S

11 to 14 V
  • Ignition switch ON
  • Shift lever "+" position (up-shift)

Below 1 V

A27-27 (SFTD) - D56-81 (E1)

O - BR

Down-shift position switch signal
  • Ignition switch ON
  • Shift lever in S

11 to 14 V
  • Ignition switch ON
  • Shift lever "-" position (down-shift)

Below 1 V

A27-26 (STP) - D56-81 (E1)

LG - BR

Stop light switch signal

Brake pedal is depressed

7.5 to 14 V

Brake pedal is released

Below 1.5 V

D56-7 (S1) - D56-81 (E1)

R - BR

S1 solenoid signal

1st gear

Below 1 V

Not on 1st gear

11 to 14 V

D56-6 (S2) - D56-81 (E1)

W - BR

S2 solenoid signal

1st, 2nd or 6th gear

11 to 14 V

3rd, 4th or 5th gear

Below 1 V

D56-3 (S3) - D56-81 (E1)

G-W - BR

S3 solenoid signal

1st, 2nd or 3rd gear

11 to 14 V

4th, 5th or 6th gear

Below 1 V

D56-5 (S4) - D56-81 (E1)

G-R - BR

S4 solenoid signal

5th or 6th gear

11 to 14 V

1st, 2nd, 3rd or 4th gear

Below 1 V

D56-4 (SR) - D56-81 (E1)

G - BR

SR solenoid signal

1st, 2nd, 3rd or 4th gear

11 to 14 V

5th or 6th gear

Below 1 V

D56-14 (SL1+) - D56-15 (SL1-)

Y - L

SL1 solenoid signal

5th or 6th gear

Pulse generation

(see waveform 1)

D56-12 (SL2+) - D56-13 (SL2-)

G-R - L-W

SL2 solenoid signal

Engine is idling

Pulse generation

(see waveform 2)

D56-9 (SLT+) - D56-8 (SLT-)

B - G-B

SLT solenoid signal

Engine is idling

Pulse generation

(see waveform 3)

D56-10 (SLU+) - D56-11 (SLU-)

L-Y - L-R

SLU solenoid signal

5th (lock-up) gear or 6th (lock-up) gear

Pulse generation

(see waveform 4)

D56-122 (THO1) - D56-98 (ETHA)

G-Y - BR

No. 1 ATF temperature sensor signal

No. 1 ATF temperature: 115°C (239°F) or more

Below 1.5 V

D56-99 (THO2) - D56-98 (ETHA)

L - BR

No. 2 ATF temperature sensor signal

No. 2 ATF temperature: 115°C (239°F) or more

Below 1.5 V

D56-101 (SP2+) - D56-100 (SP2-)

Y - B

Speed sensor SP2 signal

Vehicle speed 20 km/h (12 mph)

Pulse generation

(see waveform 5)

D56-124 (NT+) - D56-123 (NT-)

Y - B

Speed sensor NT signal

Engine is idling

(shift lever in P or N)

Pulse generation

(see waveform 6)

A27-10 (CANH) - D56-81 (E1)

GR - BR

CAN communication line

Ignition switch ON

Pulse generation

(see waveform 7)

A27-11 (CANL) - D56-81 (E1)

W - BR

CAN communication line

Ignition switch ON

Pulse generation

(see waveform 8)

A27-51 (PWR) - D56-81 (E1)

L - BR

Tow/haul pattern select switch signal
  • Ignition switch ON
  • Tow/haul pattern select switch ON

0 to 1.5 V
  • Ignition switch ON
  • Tow/haul pattern select switch OFF

Pulse generation*

HINT:

*: Voltage is input intermittently as this is an intermittent circuit. (Voltage varies between a peak of 7.5 to 14 V and a low of 0 to 1.5 V.)

(a) Using an oscilloscope, check the waveform 1.

Reference

Item

Content

Terminal No. (Symbol)

D56-14 (SL1+) - D56-15 (SL1-)

Tool setting

5 V/DIV., 1 msec./DIV.

Condition

Engine is idling

(b) Using an oscilloscope, check the waveform 2.

Reference

Item

Content

Terminal No. (Symbol)

D56-12 (SL2+) - D56-13 (SL2-)

Tool setting

5 V/DIV., 1 msec./DIV.

Condition

Engine is idling

(c) Using an oscilloscope, check the waveform 3.

Reference

Item

Content

Terminal No. (Symbol)

D56-9 (SLT+) - D56-8 (SLT-)

Tool setting

5 V/DIV., 1 msec./DIV.

Condition

Engine is idling

(d) Using an oscilloscope, check the waveform 4.

Reference

Item

Content

Terminal No. (Symbol)

D56-10 (SLU+) - D56-11 (SLU-)

Tool setting

5 V/DIV., 1 msec./DIV.

Condition

5th (lock-up)

(e) Using an oscilloscope, check the waveform 5.

Reference

Item

Content

Terminal No. (Symbol)

D56-101 (SP2+) - D56-100 (SP2-)

Tool setting

2 V/DIV., 20 msec./DIV.

Condition

Vehicle speed 20 km/h (12 mph)

(f) Using an oscilloscope, check the waveform 6.

Reference

Item

Content

Terminal No. (Symbol)

D56-124 (NT+) - D56-123 (NT-)

Tool setting

1 V/DIV., 2 msec./DIV.

Condition

Engine is idling (Shift lever in P or N)

(g) Using an oscilloscope, check the waveform 7.

Reference

Item

Content

Terminal No. (Symbol)

A27-10 (CANH) - D56-81 (E1)

Tool setting

1 V/DIV., 10 μsec./DIV.

Condition

Ignition switch ON

(h) Using an oscilloscope, check the waveform 8.

Reference

Item

Content

Terminal No. (Symbol)

A27-11 (CANL) - D56-81 (E1)

Tool setting

1 V/DIV., 10 μsec./DIV.

Condition

Ignition switch ON