Toyota Tundra. Manual — part 2843

TYPICAL ENABLING CONDITIONS

All

TYPICAL ENABLING CONDITIONS TABLE

ON malfunction (A)

TYPICAL ENABLING CONDITIONS TABLE

ON malfunction (B)

TYPICAL ENABLING CONDITIONS TABLE

TYPICAL MALFUNCTION THRESHOLDS

When both conditions below are met: ON malfunction (A) and (B)

ON malfunction (A)

TYPICAL MALFUNCTION THRESHOLDS TABLE

ON malfunction (B)

TYPICAL MALFUNCTION THRESHOLDS TABLE

WIRING DIAGRAM

Refer to WIRING DIAGRAM .

INSPECTION PROCEDURE

1. CHECK HARNESS AND CONNECTOR (4WD CONTROL ECU - BODY GROUND)

a. Disconnect the A25 4WD control ECU connector.

b. Measure the resistance according to the value (s) in the table below.

Standard resistance

Output speed sensor circuit

Not circuit malfunction

Vehicle speed sensor circuit

Not circuit malfunction

Transfer position

Not neutral

Output speed (Transfer output speed)

1000 RPM or more, and less than 3000 RPM

Output speed (Transfer output speed)

143 RPM or more

4L switch

ON

Actual transfer gear ratio Transfer input speed/Transfer output speed
(NO/NOtf)

0.9 or more, and less than
1.1

2009 Toyota Tundra

2009 TRANSMISSION AB60F Automatic Transaxle - Tundra

TESTER CONNECTION SPECIFIED CONDITION TABLE

Result

RESULT REFERENCE TABLE

Fig. 119: Identifying A25 4WD Control ECU Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

B: GO TO TOUCH SELECT 2-4 AND HIGH-LOW SYSTEM (See TERMINALS OF ECU )

A: Go to next step.

2. CHECK HARNESS AND CONNECTOR (4WD CONTROL ECU - ECM)

a. Disconnect the A24 ECM connector.

b. Measure the resistance according to the value (s) in the table below.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

Result

Tester Connection

Condition Specified Condition

A25-21 (L4) - Body ground Always

10 kohms or higher

Result Proceed to

NG

A

OK

B

Tester Connection

Condition Specified Condition

A24-21 (L4) - Body ground Always

10 kohms or higher

2009 Toyota Tundra

2009 TRANSMISSION AB60F Automatic Transaxle - Tundra

RESULT REFERENCE TABLE

Fig. 120: Identifying A24 ECM Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

B: OK (for 3UR-FE) (See REMOVAL )

C: OK (for 3UR-FBE) (See REMOVAL )

TRANSMISSION CONTROL SWITCH CIRCUIT

DESCRIPTION

When moving the shift lever into the S position using the transmission control switch, it is possible to switch the
shift range position between "1" (1st range) and "6" (6th range).

Shifting to "+" once raises the shift range position by one, and shifting to "-" lowers the shift range position by
one.

WIRING DIAGRAM

Result

Proceed to

NG

A

OK (for 3UR-FE)

B

OK (for 3UR-FBE)

C

2009 Toyota Tundra

2009 TRANSMISSION AB60F Automatic Transaxle - Tundra

Fig. 121: Identifying Transmission Control Switch - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. INSPECT TRANSMISSION CONTROL SWITCH

a. for Column Shift Type:

1. Disconnect the J25 transmission control switch connector.

2. Measure the resistance according to the value (s) in the table below.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester Connection

Condition

Specified

Condition

6 (IG) - 13 (S)

Shift lever position

on S, "+" or "-"

Below 1 ohms

5 (SFTU) - 11 (E)

Shift lever held in

"+" (Up-shift)

Below 1 ohms

4 (SFTD) - 11 (E)

Shift lever held in "-

" (Down-shift)

Below 1 ohms

6 (IG) - 13 (S)

Shift lever position
not on S, "+" or "-"

10 kohms or higher

5 (SFTU) - 11 (E)

Shift lever position

on S

10 kohms or higher

4 (SFTD) - 11 (E)

Shift lever position

on S

10 kohms or higher

2009 Toyota Tundra

2009 TRANSMISSION AB60F Automatic Transaxle - Tundra