Toyota Tundra. Manual — part 376

Fig. 38: Checking Harness And Connector (Transponder Key ECU - DLC3)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

2. CHECK HARNESS AND CONNECTOR (DLC3 - BATTERY AND BODY GROUND)

a. Measure the resistance and voltage according to the value(s) in the table below.

Standard resistance

HARNESS AND CONNECTOR (DLC3 - BATTERY AND BODY GROUND) TESTER
CONNECTION SPECIFIED CONDITION CHART RESISTANCE

Standard voltage

HARNESS AND CONNECTOR (DLC3 - BATTERY AND BODY GROUND) TESTER

Tester Connection

Condition Specified Condition

J17-4(CG) - Body ground

Always

Below 1 ohms

J17-5(SG) - Body ground

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Engine Immobilizer - Tundra

CONNECTION SPECIFIED CONDITION CHART VOLTAGE

Fig. 39: Identifying DLC3 Connector Terminals
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

TRANSPONDER KEY ECU

COMPONENTS

Tester Connection

Condition Specified Condition

J17-16 (BAT) - Body ground Always

11 to 14 V

J17-7(SIL) - J17-5(SG)

Always

Pulse generation

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Engine Immobilizer - Tundra

Fig. 40: Identifying Transponder Key ECU Replacement Components And Torque Specifications
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

REMOVAL

1. REMOVE AIR CONDITIONING UNIT

a. Remove the air conditioning unit (see REMOVAL ).

2. REMOVE TRANSPONDER KEY BRACKET (w/ Bracket)

a. Remove the 2 screws and transponder key bracket.

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Engine Immobilizer - Tundra

Fig. 41: Identifying Fasteners, Transponder Key And Bracket
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

3. REMOVE TRANSPONDER KEY ECU

a. Disconnect the lower part of the ECU, and then upper part in that order to remove the ECU.

Fig. 42: Removing Transponder Key ECU
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSTALLATION

1. INSTALL TRANSPONDER KEY ECU

a. Hook the upper part of the ECU and the lower part in that order to install the ECU.

Fig. 43: Installing Transponder Key ECU
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2. INSTALL TRANSPONDER KEY BRACKET (w/ Bracket)

a. Install the transponder key bracket with the 2 screws.

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Engine Immobilizer - Tundra