Toyota Tundra. Manual — part 320

OK: When cruise control main switch operation is performed, the result will be same as
above.

Result

RESULT REFERENCE

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: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS
TABLE

TC AND CG TERMINAL CIRCUIT

DESCRIPTION

Connecting terminals TC and CG of the DLC3 causes the system to enter self-diagnostic mode. If a malfunction
is present, DTCs will be output.

HINT:

When a particular warning light remains blinking, a ground short in the wiring of terminal TC of the DLC3 or
an internal ground short in the relevant ECU is suspected.

WIRING DIAGRAM

Result

Proceed to

OK

A

NG (for 1GR-FE)

B

NG (for 2UZ-FE)

C

NG (for 3UR-FE)

D

NG (for 3UR-FBE)

E

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Cruise Control - Tundra

Fig. 22: TC And CG Terminal Circuit - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. CHECK HARNESS AND CONNECTOR (DLC3 - ECM AND BODY GROUND)

a. Disconnect the A24 ECM connector.

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

Standard resistance

DLC3 - ECM AND BODY GROUND

Tester Connection

Condition

Specified Condition

J17-13 (TC) - A24-16 (TC)

Always

Below 1 ohms

L17-4 (CG) - Body ground

J17-13 (TC) - Body ground

Always

10 kohms or higher

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Cruise Control - Tundra

Fig. 23: Checking Harness And Connector (DLC3 - ECM And Body Ground)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

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

CRUISE CONTROL MAIN SWITCH

COMPONENTS

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Cruise Control - Tundra

Fig. 24: Identifying Cruise Control Main Switch Components With Torque Specification
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

REMOVAL

1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

CAUTION: Wait at least 90 seconds after disconnecting the cable from the

negative (-) battery terminal to prevent airbag and seat belt
pretensioner activation.

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Cruise Control - Tundra