SRS System - General Information/Service
Group90 - ELECTRICAL
Number
03-90-021
Date
October, 2003
Model
Accent 2003-2004
Subject
2003-2004 ACCENT SUPPLEMENTAL RESTRAINT SYSTEM
DESCRIPTION:
This bulletin provides general information for the Supplemental Restraint System (SRS) that is installed in 2003-2004 MY Accents produced beginning in January, 2003. The dual-stage front airbags provide two levels of inflation. A first stage inflation is provided for moderate impacts, while a second stage inflation is provided for more severe impacts.
In order to determine whether a first or second stage deployment should occur, the SRS uses several sensors to obtain information regarding the impact speed, seat belt usage and front seat position.
SRS COMPONENT LOCATIONS
NOTE
Early production 2003 Model Year Accents (before January 06, 2003 production) are not equipped with side impact airbags.
SRS COMPONENTS LISTING:
Driver Airbag (DAB):
The driver airbag is a dual output type. The airbag inflation is determined by the impact speed, seat belt usage and driver seat position.
The dual-stage DAB has two (2) separate connectors for the two circuits. The two connectors are of a different style and are not interchangeable.
The DAB connectors have additional side lock tabs and key tabs to prevent inadvertent cross connection. These connectors are different than the connector used for the DAB in prior model year Accents.
Passenger Airbag (PAB):
The passenger airbag is also a dual output type. The airbag inflation is determined by the impact speed, seat belt usage and front passenger seat position.
Although the PAB is a dual-stage airbag (like the DAB), it has one connector (4 pins) for the two circuits.
The connector is located behind the center console, just to the left of the glove box. To access the connector, open the glove box, remove both glove box stoppers and lower the glove box.
The PAB connector has a special red sliding secondary lock mechanism. To remove the connector, push the red locking clip to the left side (as shown in photo). After the secondary lock has been unfastened, the connector can be released completely by pushing down on the primary lock tab and separating the connector halves.
Seat Track Position Sensor:
The Seat Track Position Sensor (STPS) is located on the inside seat rail of both front seats. The STPS resistance changes depending on its location relative to a vane mounted on the seat rail. When the STPS is positioned over the vane (6 latching positions or more rearward of the forward-most position), its resistance is approximately 900 ohms. When it is positioned off of the vane (within 5 latching positions from the forward-most position), the sensor's resistance is approximately 300 ohms. (The STPS resistance values are measured without requiring power to the circuit).
In the event of a frontal impact severe enough to deploy the airbags, if one of the front seats is placed within 5 latching positions from the forward-most position (STPS off of the vane), only the first stage circuit will be activated for that airbag. If the front seat is placed 6 latching positions or more rearward of the forward-most position (STPS over the vane), then the SRS Control Module will deploy the airbag with either the first or second stage circuit (depending on the seat belt usage and the severity of the impact).
If there is a condition with the STPS where the SRSCM cannot determine the position of the seat, then a Seat Track Sensor Fault Code is generated and the SRS warning light will illuminate until erased from the SRSCM memory using a Hi-Scan Pro (The Fault Code MVICL remain even if the condition has been corrected).
Front Impact Sensor (FIS):
Two front impact sensors are mounted on the radiator support panel on both sides of the radiator. The purpose of the FIS is to aid in the airbag deployment decision.
Side Impact Airbag (SAB) (If Equipped):
The side impact airbags (installed in both driver and passenger front seats) are the single output type. Side airbag equipped vehicles have "SRS Airbag" imprinted on the side of the front seats. The two satellite sensors are located at the bottom of the B-pillar, behind the seat belt pretensioner assembly.
NOTE
^ Early production 2003 Model Year Accents (Pre January 06, 2003 production) do not have side impact airbags and have a different SRS wiring harness and control module. Verify which system you are working on before ordering any parts.
^ Any modification(s) of the seats may prevent proper operation of the side impact airbags when they are intended to deploy in a collision and can result in serious injury or death. See TSB # 01-90-012 ("Side Impact Airbags") for more details.
DUAL-STAGE SRS SYSTEM DIAGNOSTIC TROUBLE CODE INDEX:
Shown is a listing of the dual-stage airbag diagnostic codes and its description. Refer to the 2003 Accent Shop Manual under Restraint System for diagnostic procedures.
CAUTION
Review the safety rules noted in the shop manual before working on vehicles equipped with an airbag system.
SPECIAL SERVICE TOOL (SST) FOR DUAL-STAGE AIRBAG:
The Special Tools section on page RT-7 in the 2003 Accent Shop Manual contains an incorrect listing of the Airbag Deployment and Dummy Adapters for the dual-stage SRS system. Shown is a listing of the correct SSTs for the dual-stage system. Please record this TSB number at the bottom of the page of the Special Tools section in the 2003 Accent Shop Manual for future reference.
NOTE
Refer to TSB # 00-90-008 ("Airbag System Diagnostics") for instructions on diagnosing the airbag system.
NOTE
*The bolded part number shown in the illustration denotes a new SST. The SST part numbers are available through SPX/Kent-Moore at 1-800-345-2233.
DISPOSAL INSTRUCTIONS FOR DUAL-STAGE AIRBAGS:
In a moderate-severity impact requiring deployment of only the first stage of the dual-stage airbag, after the first stage of the dual-stage airbag has been deployed, the second stage will be deployed by the SRSCM after the collision event has been completed. Therefore, the airbag second stage does not need to be deployed intentionally for disposal after deployment of the first stage.
In a severe impact, both stages are deployed at the same time.
When scrapping a car or intentionally deploying airbag modules that are to be replaced, deploy each stage individually.
SCHEMATIC DIAGRAM CORRECTION:
The schematic diagram shown on page SD-126 in the 2003 Accent Electrical Troubleshooting Manual (ETM) is incorrect. Please record this TSB number at the bottom of the 2003 Accent ETM for future reference.
NOTE
The schematic diagrams shown on pages SD-127 and SD-128 are included in this TSB for reference only.
SCHEMATIC DIAGRAMS
SD-126
AIRBAG SYSTEM (SRS) (3)
SD-127
AIRBAG SYSTEM (SRS) (4)
SD-128
AIRBAG SYSTEM (SRS)(5)