Toyota Tundra. Manual — part 698

Fig. 4: Theft Deterrent System Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

SYSTEM DESCRIPTION

1. OUTLINE OF THEFT DETERRENT SYSTEM

a. The theft deterrent system is designed to deter vehicle break-ins and theft. If an attempted break-in

or theft is detected, the vehicle horns and security horn will sound and the hazard warning lights
will flash.

b. The system detects an attempted break-in or theft when any of the following occurs: 1) the vehicle

is forcibly entered, 2) the engine hood is forcibly opened, 3) the doors are unlocked without the use

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Theft Deterrent - Tundra

of a key, or 4) the cable from the negative (-) battery terminal is disconnected and reconnected.

c. If the system enters the alarm sounding state, any unlocked doors will automatically lock.

d. The system has 2 modes: active arming mode (refer to 1 for "ACTIVE ARMING MODE") and

passive arming mode (refer to 2 for "PASSIVE ARMING MODE"). Passive arming mode can be
turned on and off using the Techstream.

e. Each mode has 4 states: disarmed state, arming preparation state, armed state and alarm sounding

state.

1. Disarmed state:



The alarm function is not operating.



The theft deterrent system is not operating.

2. Arming preparation state:

The theft deterrent system is not operating.

3. Armed state:

The theft deterrent system is operating.

4. Alarm sounding state:

The alarm function is operating (60 +/-5 seconds).

Refer to table below for alarm method and time

THEFT DETERRENT SYSTEM ALARM METHOD AND TIME REFERENCE
CHART

HINT:

If, during the alarm sounding state, one of the doors is unlocked without using the proper
key, a forced door lock signal will be output (refer to 3 for "FORCED DOOR LOCK
CONTROL").

2. FUNCTION OF MAIN COMPONENT

THEFT DETERRENT SYSTEM FUNCTION OF MAIN COMPONENT

Alarm Method

Hazard Warning Light Blinking (cycle of flasher relay)
Vehicle Horn

Sounding (cycle of 0.4 seconds)

Security Horn

Sounding (cycle of 0.4 seconds)

Headlight

Flashing

Taillight

Flashing

Room light

Illuminating

Security Indicator

Illuminating

Alarm Time

60 +/-5 seconds

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Theft Deterrent - Tundra

3. SYSTEM FUNCTION

a. Disarmed state:



The alarm function is not operating.



The theft deterrent system is not operating.

b. Arming preparation state:



The theft deterrent system is not operating.

c. Arming state:



The theft deterrent system is operating.

d. Alarm sounding state:



The alarm function is operating (60 +1-5 seconds).

HOW TO PROCEED WITH TROUBLESHOOTING

HINT:



Use these procedures to troubleshoot the theft deterrent system.



*: Use the Techstream.



Troubleshooting of the theft deterrent system is based on the premise that the door lock control system,
the wireless door lock control system, the lighting system, the horn system, and the engine immobilizer
system are operating normally. Check these systems first before troubleshooting the theft deterrent
system.

1. VEHICLE BROUGHT TO WORKSHOP

2. INSPECT BATTERY VOLTAGE

Function

Outline

Security indicator

Informs driver of theft deterrent system status

Security horn

Sounds when attempted brake-in or theft is detected

Taillight

Taillights illuminate if system enters alarm sounding state when system is unset

Hazard warning light Hazard warning lights begin flashing when attempted break-in or theft is detected
Vehicle horns

Sounds when attempted break-in or theft is detected

Door courtesy light
switch

Detects door open status (open or closed)

Door unlock detection
switch

Detects door unlock status

Engine hood courtesy
switch

Detects engine hood open status (open or closed)

Main body ECU

Detects ignition switch condition (OFF, ON, ACC or engine running)

Glass breakage sensor
ECU*

Glass breakage sensor ECU outputs alarm request signal to main body ECU
when sound of glass breaking is detected

HINT:
*: w/ Glass Breakage Sensor

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Theft Deterrent - Tundra

Standard voltage: 11 to 14 V

If the voltage is below 11 V, recharge or replace the battery before proceeding.

3. PROBLEM SYMPTOMS TABLE

Result

PROBLEM SYMPTOMS RESULT CHART

B: Go to step 5

A: Go to Next Step

4. OVERALL ANALYSIS AND TROUBLESHOOTING*

a. See DATA LIST / ACTIVE TEST

b. See TERMINALS OF ECU

c. See OPERATION CHECK

5. REPAIR OR REPLACE

6. CONFIRMATION TEST

NEXT: END

OPERATION CHECK

HINT:

If the battery is reconnected during the armed state, the system may enter the alarm sounding state and the alarm
may sound. If so, perform a wireless unlock operation or entry unlock operation to stop the alarm.

1. ACTIVE ARMING MODE

HINT:

Active arming mode starts the alarm control immediately after the doors are locked.

ACTIVE ARMING MODE CHART

Result

Proceed to

Fault is not listed in problem symptoms table

A

Fault is listed in problem symptoms table

B

System state

State switching condition

Switches to

Perform any of following, and system will go on to "Arming
preparation state":



With all doors and engine hood closed, lock all doors

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Theft Deterrent - Tundra