Toyota Tundra. Manual — part 2792

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 graphic above as a reference for the ECM terminals.

ECM TERMINALS REFERENCE TABLE

Terminal No.

(Symbol)

Wiring

Color

Terminal Description

Condition

Specified Condition

A24-21 (L4) - D74-

81 (E1)

Y - BR 4L position signal



Ignition switch ON



Transfer position
switch on 4L

Below 1.5 V

A24-21 (L4) - D74-

81 (E1)

Y - BR 4L position signal



Ignition switch ON



Transfer position
switch not on 4L

11 to 14 V

A24-5 (TFN) -

D74-81 (E1)

G - BR Neutral position signal



Ignition switch ON



Transfer position in
neutral

Below 1.5 V

A24-5 (TFN) -

D74-81 (E1)

G - BR Neutral position signal



Ignition switch ON



Transfer position not
in neutral

11 to 14 V

D74-120 (NSW) -

D74-81 (E1)

L - BR PNP switch signal



Ignition switch ON



Shift lever on P or N

Below 1 V

D74-120 (NSW) -

D74-81 (E1)

L - BR PNP switch signal



Ignition switch ON



Shift lever not on P
or N

11 to 14 V

D74-2 (P) - D74-81

(E1)

G-B - BR

P shift position switch
signal



Ignition switch ON



Shift lever on P

11 to 14 V

D74-2 (P) - D74-81

(E1)

G-B - BR

P shift position switch
signal



Ignition switch ON



Shift lever not on P

Below 1 V

D74-26 (R) - D74-

81 (E1)

L-R - BR

R shift position switch
signal



Ignition switch ON



Shift lever on R

11 to 14 V

D74-26 (R) - D74-

81 (E1)

L-R - BR

R shift position switch
signal



Ignition switch ON



Shift lever not on R

Below 1 V

D74-25 (N) - D74-

81 (E1)

G-W -

BR

N shift position switch
signal



Ignition switch ON



Shift lever on N

11 to 14 V

D74-25 (N) - D74-

81 (E1)

G-W -

BR

N shift position switch
signal



Ignition switch ON



Shift lever not on N

Below 1 V

D74-27 (D) - D74-

D shift position switch



Ignition switch ON

2009 Toyota Tundra

2009 TRANSMISSION AB60F Automatic Transaxle - Tundra

81 (E1)

G - BR signal



Shift lever on D

11 to 14 V

D74-27 (D) - D74-

81 (E1)

G - BR

D shift position switch
signal



Ignition switch ON



Shift lever not on D

Below 1 V

A24-25 (S) - D74-

81 (E1)

Y - BR

S shift position switch
signal



Ignition switch ON



Shift lever on S

11 to 14 V

A24-25 (S) - D74-

81 (E1)

Y - BR

S shift position switch
signal



Ignition switch ON



Shift lever not on S

Below 1 V

A24-38 (SFTU) -

D74-81 (E1)

G - BR

Up-shift position
switch signal



Ignition switch ON



Shift lever on S

11 to 14 V

A24-38 (SFTU) -

D74-81 (E1)

G - BR

Up-shift position
switch signal



Ignition switch ON



Shift lever "+"
position (up-shift)

Below 1 V

A24-27 (SFTD) -

D74-81 (E1)

O - BR

Down-shift position
switch signal



Ignition switch ON



Shift lever on S

11 to 14 V

A24-27 (SFTD) -

D74-81 (E1)

O - BR

Down-shift position
switch signal



Ignition switch ON



Shift lever "-"
position (down-shift)

Below 1 V

A24-36 (STP) -

D74-81 (E1)

LG - BR Stop light switch signal Brake pedal is depressed

7.5 to 14 V

A24-36 (STP) -

D74-81 (E1)

LG - BR Stop light switch signal Brake pedal is released

Below 1.5 V

D74-7 (S1) - D74-

81 (E1)

R - BR S1 solenoid signal

1st gear

Below 1 V

D74-7 (S1) - D74-

81 (E1)

R - BR S1 solenoid signal

Not on 1st gear

11 to 14 V

D74-6 (S2) - D74-

81 (E1)

W - BR S2 solenoid signal

1st, 2nd or 6th gear

11 to 14 V

D74-6 (S2) - D74-

81 (E1)

W - BR S2 solenoid signal

3rd, 4th or 5th gear

Below 1 V

D74-3 (S3) - D74-

81 (E1)

G-W -

BR

S3 solenoid signal

1st, 2nd or 3rd gear

11 to 14 V

D74-3 (S3) - D74-

81 (E1)

G-W -

BR

S3 solenoid signal

4th, 5th or 6th gear

Below 1 V

D74-5 (S4) - D74-

81 (E1)

G-R - BR S4 solenoid signal

5th or 6th gear

11 to 14 V

D74-5 (S4) - D74-

81 (E1)

G-R - BR S4 solenoid signal

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

Below 1 V

D74-4 (SR) - D74-

81 (E1)

G - BR SR solenoid signal

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

11 to 14 V

D74-4 (SR) - D74-

G - BR SR solenoid signal

5th or 6th gear

Below 1 V

2009 Toyota Tundra

2009 TRANSMISSION AB60F Automatic Transaxle - Tundra

a. Using an oscilloscope, check waveform 1.

Reference:

WAVEFORM REFERENCE TABLE

81 (E1)

D74-14 (SL1+) -

D74-15 (SL1-)

Y - L

SL1 solenoid signal

5th or 6th gear

Pulse generation

(See waveform 1)

D74-12 (SL2+) -

D74-13 (SL2-)

G-R - L-

W

SL2 solenoid signal

Engine is idling

Pulse generation

(See a waveform 2)

D74-9 (SLT+) -

D74-8 (SLT-)

B - G-B SLT solenoid signal

Engine is idling

Pulse generation

(See b waveform 3)

D74-10 (SLU+) -

D74-11 (SLU-)

L-Y - L-

R

SLU solenoid signal

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

Pulse generation

(See c waveform 4)

D74-122 (THO1) -

D74-98 (ETHA)

G-Y - BR

No. 1 ATF temperature
sensor signal

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

Below 1.5 V

D74-99 (THO2) -

D74-98 (ETHA)

L - BR

No. 2 ATF temperature
sensor signal

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

Below 1.5 V

D74-101 (SP2+) -

D74-100 (SP2-)

Y - B

Speed sensor SP2
signal

Vehicle speed 20 km/h (12
MPH)

Pulse generation

(See d waveform 5)

D74-124 (NT+) -

D74-123 (NT-)

Y - B

Speed sensor NT signal

Engine is idling (shift lever
on P or N)

Pulse generation

(See e waveform 6)

A24-10 (CANH) -

D74-81 (E1)

GR - BR

CAN communication
line

Ignition switch ON

Pulse generation

(See f waveform 7)

A24-11 (CANL) -

D74-81 (E1)

W - BR

CAN communication
line

Ignition switch ON

Pulse generation

(See g waveform 8)

A24-51 (PWR) -

D74-81 (E1)

L - BR

Tow/haul pattern select
switch signal



Ignition switch ON



Tow/haul pattern
select switch ON

0 to 1.5 V

A24-51 (PWR) -

D74-81 (E1)

L - BR

Tow/haul pattern select
switch signal



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.)

Terminal No.

(Symbol)

Tool Setting

Condition

D74-14 (SL1+) -
D74-15 (SL1-)

5 V/DIV., 1

msec./DIV.

Engine is idling

2009 Toyota Tundra

2009 TRANSMISSION AB60F Automatic Transaxle - Tundra

Fig. 10: Identifying Waveform 1
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b. Using an oscilloscope, check waveform 2.

Reference:

WAVEFORM REFERENCE TABLE

Fig. 11: Identifying Waveform 2
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

c. Using an oscilloscope, check waveform 3.

Reference:

WAVEFORM REFERENCE TABLE

Terminal No.

(Symbol)

Tool Setting

Condition

D74-12 (SL2+) -
D74-13 (SL2-)

5 V/DIV., 1

msec./DIV.

Engine is idling

Terminal No.

(Symbol)

Tool Setting

Condition

D74-9 (SLT+) -
D74-8 (SLT-)

5 V/DIV., 1

msec./DIV.

Engine is idling

2009 Toyota Tundra

2009 TRANSMISSION AB60F Automatic Transaxle - Tundra