Toyota Tundra. Manual — part 318

B: REPLACE ECM (See REMOVAL (1GR-FE))

C: REPLACE ECM (See REMOVAL (2UZ-FE))

D: REPLACE ECM (See REMOVAL (3UR-FE))

E: REPLACE ECM (See REMOVAL (3UR-FBE))

A: USE SIMULATION METHOD TO CHECK (see ELECTRONIC CIRCUIT INSPECTION
PROCEDURE )

CRUISE CONTROL SWITCH CIRCUIT

DESCRIPTION

The cruise control main switch operates 7 functions: SET, COAST, TAP-DOWN, RESUME, ACCEL, TAP-
UP, and CANCEL. The SET, TAP-DOWN and COAST functions, and the RESUME, TAP-UP and ACCEL
functions are operated with the same switch. The cruise control main switch is an automatic return type switch
which turns on only while operating it in each arrow direction and turns off after releasing it. The internal
contact point of the cruise control main switch is turned on with the switch operation. Then the ECM reads the
resistance value that has been changed by the switch operation to control SET, COAST, RESUME, ACCEL and
CANCEL.

WIRING DIAGRAM

Fig. 16: Cruise Control Switch Circuit - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Cruise Control - Tundra

1. READ VALUE OF TECHSTREAM (CRUISE CONTROL MAIN SWITCH)

a. Using the Techstream, read the Data List.

Fig. 17: Checking Cruise Control Main Switch
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Techstream

DATA LIST - CRUISE CONTROL

OK: When cruise control main switch operation is performed, the results are the same as
above.

NG: Go to step 2

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS
TABLE

Tester Display

Measurement Item /

Range

Normal Condition

Diagnostic Note

CCS Main SW M-CPU

Main switch signal
(Main CPU) / ON or
OFF

ON: Main switch ON
(Pushed on)
OFF: Main switch OFF
(Pushed off)

-

Cancel Switch

CANCEL switch
signal / ON or OFF

ON: CANCEL switch
ON
OFF: CANCEL switch
OFF

-

SET/COAST Switch

SET / COAST switch
signal / ON or OFF

ON: SET / COAST
switch ON
OFF: SET / COAST
switch OFF

-

RES/ACC Switch

RES / ACC switch
signal / ON or OFF

ON: RES / ACC switch
ON
OFF: RES / ACC
switch OFF

-

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Cruise Control - Tundra

2. INSPECT CRUISE CONTROL MAIN SWITCH

Fig. 18: Identifying Cruise Control Main Switch
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

a. Remove the cruise control main switch (see REMOVAL ).

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

Standard resistance

CRUISE CONTROL MAIN SWITCH

NG: REPLACE CRUISE CONTROL MAIN SWITCH (see REMOVAL )

OK: Go to Next Step

3. INSPECT SPIRAL CABLE

a. If there are any defects as follows, replace the spiral cable with a new one: Scratches, cracks, dents

or chips on the connector or the spiral cable.

b. Check spiral cable.

1. Set the spiral cable to the center position (see INSPECTION ).

Tester Connection

Switch Condition

Specified Condition

1 - 3

Neutral

10 kohms or higher

RES/ACC

235 to 245 ohms

SET/COAST

620 to 640 ohms

CANCEL

1510 to 1570 ohms

Main Switch OFF

10 kohms or higher

Main Switch ON

Below 1 ohms

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Cruise Control - Tundra

2. After setting the spiral cable to the center position, rotate the spiral cable 2.5 times clockwise,

and measure the resistance according to the value(s) in the table below. Then rotate the spiral
cable 5 times counterclockwise, and measure the resistance according to the value(s) in the
table below.

Standard resistance

SPIRAL CABLE (1 OF 2)

3. After setting the spiral cable to the center position, rotate the spiral cable 2.5 times clockwise.

Then while rotating the spiral cable 5 times counterclockwise, measure the resistance
according to the value(s) in the table below.

Standard resistance

SPIRAL CABLE (2 OF 2)

Tester Connection

Condition

Specified Condition

z2-4 - J45-1 (CCS)

Always

Below 1 ohms

z2-3 - J45-2 (ECC)

Tester Connection

Condition

Specified Condition

z2-4 - J45-1 (CCS)

Always

Below 1 ohms

z2-3 - J45-2 (ECC)

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Cruise Control - Tundra