Toyota Tundra (2015 year). Manual — part 728

OK

(b) for Floor Shift Type:

(1) Disconnect the J24 transmission control switch connector.

(2) Measure the voltage according to the value(s) in the table

below.

Standard voltage:

TESTER CONNECTION

SWITCH

CONDITION

SPECIFIED

CONDITION

J24-3 (IG) - Body

ground

Ignition switch ON

11 to 14 V

J24-3 (IG) - Body

ground

Ignition switch off

Below 1 V

(3) Measure the resistance according to the value(s) in the

table below.

Standard resistance:

TESTER CONNECTION

CONDITION

SPECIFIED CONDITION

J24-5 (E) - Body ground

Always

Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.

CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL SWITCH - ECM)

(a) Disconnect the A24 ECM connector.

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

AB60F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMIS...

Standard voltage:

TESTER CONNECTION

CONDITION

SPECIFIED CONDITION

A24-25 (S) - Body ground

Ignition switch ON

Shift lever position on S, "+" or "-"

11 to 14 V

A24-25 (S) - Body ground

Ignition switch ON

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

Below 1 V

(c) Turn the ignition switch off.

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

Standard resistance:

TESTER CONNECTION

CONDITION

SPECIFIED CONDITION

A24-38 (SFTU) - Body ground

Shift lever held in "+"

(Up-shift)

Below 1 Ω

A24-27 (SFTD) - Body ground

Shift lever held in "-"

(Down-shift)

Below 1 Ω

A24-38 (SFTU) - Body ground

Shift lever position on S

10 kΩ or higher

A24-27 (SFTD) - Body ground

Shift lever position on S

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN

IN PROBLEM SYMPTOMS TABLE

AB60F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMIS...

Last Modified: 9-16-2014

6.6 J

Doc ID: RM0000031IU02WX

Model Year: 2015

Model: Tundra

Prod Date Range: [08/2014 - ]

Title: AB60F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: Pattern Select Switch Circuit;

2015 MY Tundra [08/2014 - ]

Pattern Select Switch Circuit

DESCRIPTION

The ECM receives tow/haul pattern select switch information and performs the tow/haul control.

While the tow/haul control is operating, in contrast to normal mode, low gears are used to increase engine

braking and towing power, reduce frequent shifts, and improve driveability. The tow/haul control includes throttle

control, shift schedule control, wide open throttle shift timing control and AI-SHIFT control.

Tow/haul mode only operates when the shift lever is in the D position and the tow/haul pattern select switch is

ON.

HINT:

The tow/haul pattern select switch is a momentary-type switch.
In order to cancel tow/haul mode, push the tow/haul pattern select switch again or turn the ignition switch
off.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1.

INSPECT TOW/HAUL PATTERN SELECT SWITCH ASSEMBLY

AB60F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMIS...

A

(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

SWITCH CONDITION

SPECIFIED

CONDITION

12 (P) - 9 (E)

Tow/haul pattern select

switch ON

Below 1 Ω

12 (P) - 9 (E)

Tow/haul pattern select

switch OFF

10 kΩ or higher

(b) for Floor Shift Type:

(1) Disconnect the J23 tow/haul pattern select switch

connector.

(2) Measure the resistance according to the value(s) in the

table below.

Standard resistance:

TESTER

CONNECTION

SWITCH CONDITION

SPECIFIED

CONDITION

4 - 1

Tow/haul pattern select

switch ON

Below 1 Ω

4 - 1

Tow/haul pattern select

switch OFF

10 kΩ or higher

Result

RESULT

PROCEED TO

OK

A

NG (for Column Shift Type)

B

NG (for Floor Shift Type)

C

B

REPLACE COLUMN SHIFT SHIFT LEVER

SUB-ASSEMBLY (TRANSMISSION CONTROL SWITCH)

C

REPLACE TOW/HAUL PATTERN SELECT SWITCH

ASSEMBLY

AB60F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMIS...