Toyota Tacoma 2015-2018 Service Manual: While Alarm is Armed, Battery is Reconnected but Alarm does not Sound
DESCRIPTION
While the alarm is armed, the EEPROM inside the main body ECU (multiplex network body ECU) will remember the armed state even if the battery is disconnected, and the alarm will sound when the battery is reconnected.
If the alarm does not sound when the battery is reconnected, the alarm may not have been set, or there may be a malfunction in the main body ECU (multiplex network body ECU).
CAUTION / NOTICE / HINT
NOTICE:
Before replacing the main body ECU (multiplex network body ECU), refer to Registration
(See page .gif)
).*1
- *1: w/ Smart Key System
PROCEDURE
|
1. |
CHECK SECURITY INDICATOR LIGHT OPERATION |
(a) Close all doors and the engine hood.
(b) Lock the doors using wireless operation*1, key linked operation or entry operation*2.
- *1: w/ Wireless Door Lock System
- *2: w/ Smart Key System
(c) Check that the security indicator light illuminates.
(d) After 30 seconds have elapsed, check that the security indicator light changes from illuminated to flashing.
HINT:
The illumination status of the security indicator light can be used to determine whether the theft deterrent system is set or unset.
| OK | .gif) |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
| NG | |
GO TO THEFT DETERRENT SYSTEM CANNOT BE SET OR UNSET |
Some Alarm Functions do not Operate
DESCRIPTION
When the alarm sounds, the following alarm functions operate: the roof console
box assembly and No. 1 room light assembly illuminates, and the headlights, taillights
and hazard lights ...
While Alarm is Armed, Engine Hood is opened but Alarm does not Sound
DESCRIPTION
A situation in which the alarm is armed but does not sound when the hood is opened
can be caused when the main body ECU (multiplex network body ECU) cannot detect
whether the hood cou ...
Other materials:
Acceleration Sensor Stuck Malfunction (C1232,C1243,C1245,C1279)
DESCRIPTION
The skid control ECU (master cylinder solenoid) receives signals from the yaw
rate and acceleration (airbag sensor assembly) via the CAN communication system.
The airbag sensor assembly has a built-in yaw rate and acceleration sensor and
detects the vehicle's condition using 2 ...
Data List / Active Test
DATA LIST / ACTIVE TEST
DATA LIST
NOTICE:
In the table below, the values listed under "Normal Condition" are reference
values. Do not depend solely on these reference values when deciding whether a part
is faulty or not.
HINT:
Using the Techstream to read the Data List allows the ...
If the vehicle battery is discharged
The following procedures may be used to start the engine if the vehicle’s
battery is discharged.
You can call your Toyota dealer or qualified repair shop.
If you have a set of jumper (or booster) cables and a second vehicle with a 12-volt
battery, you can jump start your Toyota following the ...