Toyota Tundra. Manual — part 707

DESCRIPTION

When the theft deterrent system is in the disarmed state, the security indicator will flash continuously if the
immobilizer system is set, or not illuminate if the immobilizer system is not set.

When the theft deterrent system is in the armed state, the immobilizer system is automatically set and the
security indicator will flash continuously.

When the theft deterrent system is in the arming preparation state and alarm sounding state, the main body ECU
causes the security indicator to be illuminated.

WIRING DIAGRAM

Fig. 25: Security Indicator Light - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. PERFORM ACTIVE TEST BY TECHSTREAM (SECURITY INDICATOR)

a. Operate Techstream according to the steps on the display and select "Active Test".

Techstream

Main Body

TECHSTREAM MAIN BODY REFERENCE CHART

OK: Security indicator illuminates.

NG: Go to step 2

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

2. CHECK HARNESS AND CONNECTOR (ACCESSORY METER - MAIN BODY ECU)

Tester Display

Test Part

Control Range Diagnostic Note

Security Indicator Security indicator

ON or OFF

-

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Theft Deterrent - Tundra

a. Disconnect the J1 main body ECU connector.

b. Disconnect the K20 accessory meter connector.

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

Standard resistance

ACCESSORY METER - MAIN BODY ECU

Fig. 26: Checking Harness And Connector (Accessory Meter - Main Body ECU)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE ACCESSORY METER (See REMOVAL )

ECU POWER SOURCE CIRCUIT

DESCRIPTION

Tester Connection

Condition Specified Condition

K20-16 (MHTR) - J1-4 (IND)

Always

Below 1 ohms

K20-16 (MHTR) - Body ground Always

10 kohms or higher

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Theft Deterrent - Tundra

This circuit provides power to operate the main body ECU.

WIRING DIAGRAM

Fig. 27: ECU Power Source - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. INSPECT FUSE (DR/LCK, ECU-B1)

a. Remove the DR/LCK fuse from the main body ECU.

b. Remove the ECU-B1 fuse from the engine room junction block.

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

Standard resistance

FUSE (DR/LCK, ECU-B1)

NG: REPLACE FUSE

OK: Go to Next Step

Tester Connection Condition Specified Condition

DR/LCK fuse

Always

Below 1 ohms

ECU-B1 fuse

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Theft Deterrent - Tundra

2. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY AND BODY

GROUND)

Fig. 28: Identifying Main Body ECU Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

a. Disconnect the DA, DB and DD main body ECU connectors.

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

Standard voltage

MAIN BODY ECU - BATTERY AND BODY GROUND VOLTAGE

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

Standard resistance

MAIN BODY ECU - BATTERY AND BODY GROUND RESISTANCE

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

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

GLASS BREAKAGE SENSOR (FOR COLUMN SHIFT TYPE)

COMPONENTS

Tester Connection

Condition Specified Condition

DB-13 (BECU) - Body ground

Always

11 to 14 V

DA-1 (ALTB) - Body ground

Tester Connection

Condition Specified Condition

DD-62 (GND1, GND2) - Body ground Always

Below 1 ohms

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Theft Deterrent - Tundra