Toyota Tundra (2015 year). Manual — part 2983
Last Modified: 9-16-2014
6.6 D
Doc ID: RM000000XFC0GKX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: SYSTEM DESCRIPTION; 2015 MY Tundra [08/2014
- ]
SYSTEM DESCRIPTION
1. GENERAL
(a) In conjunction with the impact absorbing structure for a front collision, the SRS (Supplemental Restraint
System) driver airbag, front passenger airbag, driver side knee airbag, and front passenger side knee
system which detects the impact during a front collision using the center airbag sensor and front airbag
sensors. It also operates the airbag system and seat belt pretensioners.
airbag were designed to help reduce shock to the driver, front passenger (and rear outer passengers*) in
*: for Double Cab and CrewMax
(d) The curtain shield airbag helps reduce shock to the front (and rear*1) seat occupants. In conjunction with
doors.
HINT:
*1: for Double Cab and CrewMax
*2: for Regular Cab and CrewMax
*3: for Double Cab
(e) In this system, a front side collision is detected by the side airbag sensor in order to simultaneously deploy
the front seat side airbag, and curtain shield airbags.
for Double Cab and CrewMax:
A rear side collision is detected by the side airbag sensor and the center airbag sensor in order to deploy the
curtain shield airbag.
(f) The center airbag sensor sends the airbag deployment signal to the ECM through the CAN (Controller Area
Network) to operate the fuel pump control.
(g) The center airbag sensor sends the airbag deployment signal to the main body ECU via the discrete line to
operate collision door lock release control.
2. CONSTRUCTION AND OPERATION
(a) FRONT AIRBAG SENSOR
(1) The front airbag sensors are installed on the right and left radiator supports respectively.
(3) The deceleration sensor is built into the front airbag sensor, and the distortion that is created in the
sensor is converted into an electric signal based on the vehicle deceleration rate during a front collision.
HINT:
*1: for Regular Cab and CrewMax
*2: for Double Cab
sensor is converted into an electric signal based on the vehicle deceleration rate during a side (and
*: for Double Cab and CrewMax
(c) DOOR SIDE AIRBAG SENSOR (except Regular Cab)
(1) The door side airbag sensors are installed on the right and left front doors respectively.
sensor is converted into an electric signal based on the vehicle deceleration rate during a front side
(1) General
The center airbag sensor is installed on the center floor under the instrument panel.
The center airbag sensor receives signals from the deceleration sensor and safing sensor built
into the center airbag sensor and front airbag sensor. Then the center airbag sensor
determines whether the driver airbag, front passenger airbag, driver side knee airbag, front
passenger side knee airbag, front seat belt pretensioners and rear seat belt pretensioners
should be activated, and diagnoses system malfunctions.
The center airbag sensor causes the front side and curtain shield airbags to deploy when
receiving signals from the side airbag sensors.
The center airbag sensor receives signals from the deceleration sensor and the electronic
safing sensor built into the center airbag sensor and the side airbag sensor, and determines
whether the curtain shield airbag should be activated, and diagnoses system malfunctions.
The center airbag sensor sends the airbag deployment signal to the ECM through the CAN to
operate the fuel pump control.
The center airbag sensor sends the airbag deployment signal to the main body ECU through
the discrete line to operate collision door lock release control.
(2) Deceleration sensor and ignition control circuit
The deceleration sensor is built into the center airbag sensor.
The ignition control circuit performs calculations based on the signal output from the
SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: SYST...
(3) Safing sensor
The safing sensor is built into the center airbag sensor. During a front collision, the sensor turns on
and outputs an ON signal to the center airbag sensor if a deceleration rate sent to the safing sensor
is greater than the specified value.
(4) Electronic safing sensor
The electronic safing sensor is built into the center airbag sensor. During a side collision, the sensor
turns on and outputs an ON signal to the center airbag sensor if a deceleration rate sent to the
electronic safing sensor is greater than the specified value.
(5) Backup power source
supplies electric power to the system. The DC-DC converter operates as a boosting transformer
when the battery voltage falls below a predetermined level.
(6) Diagnostic circuit
This circuit constantly diagnoses system malfunctions. When a malfunction is detected, it turns on the
SRS warning light on the combination meter to inform the driver.
(7) Memory circuit
When a malfunction is detected in the diagnostic circuit, it is coded and stored in the memory circuit.
(e) SRS WARNING LIGHT
operating conditions when the ignition switch is turned ON, it comes on for approximately 6 seconds and
then goes off.
3. DEPLOYMENT CONDITION
If the vehicle collides and the shock is greater than the specified value, the SRS is activated automatically. The
center airbag sensor includes the safing sensor and deceleration sensor. The safing sensor is designed to turn on at
a lower deceleration rate than the deceleration sensor.
(a) The center airbag sensor determines whether ignition is necessary based on signals from the deceleration
sensor and the front airbag sensor. If the safing sensor turns on simultaneously, current flows to the squibs
to deploy the SRS as shown in the illustration below.
SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: SYST...
HINT:
(b) The center airbag sensor determines whether ignition is necessary based on signals from the door side
airbag sensor. If the safing sensor turns on simultaneously, current flows to the squib to deploy the SRS as
shown in the illustration below.
(c) The center airbag sensor determines whether ignition is necessary based on signals from the side airbag
sensor. If the safing sensor turns on simultaneously, current flows to the squib to deploy the SRS as shown
in the illustration below.
SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: SYST...
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст