Components and Components Location

Components

1. Front right Pressure Impact Sensor (FIS) 2. Supplemental Restraint System Control Module (SRSCM) 3. Front left Pressure Impact Sensor (FIS)

4. Gravity Side Impact Sensor (G-SIS) 5. Pressure Side Impact Sensor (P-SIS)

Schematic Diagrams

Circuit Diagram

SRS Control Module (SRSCM) Components and Components Location

Components

1. Supplemental Restraint System Control Module (SRSCM)

Supplemental Restraint System Control Module (SRSCM)

No	Connector A	Connector B
1	IGN 1	Ground
2	Driver front impact sensor - High (+)	Driver seat belt pretensioner - High (+)
3	Driver front impact sensor - Low (-)	Driver seat belt pretensioner - Low (-)
4	Driver airbag 1st stage - High (+)	Driver emergency fastening device - Low (-)
5	Driver airbag 1st stage - Low (-)	Driver emergency fastening device - High (+)
6	Passenger airbag 1st stage - Low (-)	Driver side airbag - High (+)
7	Passenger airbag 1st stage - High (+)	Driver side airbag - Low (-)
8	-	Passenger side airbag - Low (-)
9	-	Passenger side airbag - High (+)
10	Crash signal output	Driver side impact sensor - High (+)
11	Passenger front impact sensor - High (+)	Driver side impact sensor - Low (-)
12	Passenger front impact sensor - Low (-)	Passenger side impact sensor - Low (-)
13	Driver airbag 2nd stage - High (+)	Passenger side impact sensor - High (+)
14	Driver airbag 2nd stage - Low (-)	-
15	Passenger airbag 2nd stage - Low (-)	Passenger seat belt pretensioner - High (+)
16	Passenger airbag 2nd stage - High (+)	Passenger seat belt pretensioner - Low (-)
17	C-CAN (High)	Passenger emergency fastening device - Low (-)
18	C-CAN (Low)	Passenger emergency fastening device - High (+)
19	-	Driver curtain airbag - High (+)
20	Passenger airbag indicator	Driver curtain airbag - Low (-)
21	-	Passenger curtain airbag - Low (-)
22	Driver Knee Airbag - High (+)	Passenger curtain airbag - High (+)
23	Driver Knee Airbag - Low (-)	Driver Passenger side impact sensor - High (+)
24	-	Driver pressure side impact sensor - Low (-)
25	-	Passenger pressure side impact sensor - Low (-)
26	Local CAN (High)	Passenger Passenger side impact sensor - High (+)
27	Local CAN (Low)	-
28		-
29		-
30		-
31		-
32		-
33		-
34		-
35		-
36		-
37		-
38		-
39		-

SRS Control Module (SRSCM) Description and Operation

Description

•	Supplemental Restraint System Control Module (SRSCM) determines whether and when to deploy air bag module, seat belt pretensioner (BPT) and emergency fastenig device (EFD).

•	It supplies the air bag module with the power required to deploy the module or the BPT and EFD.

•	It also performs self-diagnosis function of the supplemental restraint system.

SRS Control Module (SRSCM) Repair procedures

Removal

1.	Remove the ignition key from the vehicle.

2.	Disconnect the battery negative cable and wait for at least three minutes before beginning work.

3.	Remove the floor console. (Refer to Body - "Floor Console Assembly")

4.	Remove the center console duct (A) after loosening the mounting nut.

5.	Disconnect the SRSCM connectors.

6.	Remove the SRSCM (A) after loosening the mounting nuts.

Installation

1.	Remove the ignition key from the vehicle.

2.	Disconnect the battery negative cable and wait for at least three minutes before beginning work.

3.	Install the SRSCM (A) with the SRSCM mounting nuts. Tightening torque : 7.8 ~ 9.8 N.m (0.8 ~ 1.0 kgf.m, 5.8 ~ 7.2 lb-ft)

4.	Connect the SRSCM harness connectors.

5.	Install the heater ducts and floor console. (Refer to Body - "Floor Console Assembly")

6.	Reconnect the battery negative cable.

7.

After installing the SRSCM, confirm proper system operation : Turn the ignition switch ON; the SRS indicator light should be turned on for about six seconds and then go off. • If the SRSCM is replaced always, perform variant coding. Also, perform the lateral G sensor 0 point setup. (Refer to Brake System - "Yaw-rate and Lateral G Sensor")

Variant Coding

After replacing the SRSCM with a new one, the "Variant Coding" procedure must be performed.

1. On SRSCM variant coding mode, the airbag warning lamp periodically blinks (ON: 0.5sec., OFF: 0.5sec.) until the coding is normally completed. 2. If the variant coding fails, DTC B176200 (ACU Coding Error) will be displayed and the warning lamp will turn on. In this case, perform the variant coding procedure again after confirming the cause in “DTC Fault State Information”. Variant Coding can be performed up to 255 times, but if the number of coding work exceeds 255 times, DTC B168300 (Exceed Maximum coding Number) will be displayed and SRSCM must be replaced. 3. If the battery voltage is low (less than 9V), DTC B110200 will be displayed. In this case, charge the battery before anything else, and then perform the variant coding procedure. DTC B176200 (ACU Coding Error) and B110200 (Battery Voltage Low) may be displayed simultaneously.

Variant Coding Procedure

¦ On-line type on GDS

1.	Turn the ignition switch OFF.

2.	Connect the GDS.

3.	Turn the ignition switch ON without the engine running.

4.	Select vehicle name and airbag system.

5.	Select variant coding mode.

6.	Follow the steps on the screen below. (1) Initial ACU Variant Coding screen (2) VIN Code entering screen (3) Variant Coding's proceeding screen-1 (4) Variant Coding's proceeding screen-2 (5) Variant Coding is completed

1. This screen is shown when you try variant coding on the SRSCM which has been performed before. 2. This screen is shown when communication failure has occurred.

¦ Off-line type on GDS (Use when not connected to the internet)

1.	Turn the ignition switch OFF.

2.	Connect the GDS.

3.	Turn the ignition switch ON without the engine running.

4.	Select vehicle name and airbag system.

5.	Select variant coding mode.

6.

Follow the steps on the screen below. (1) Initial ACU Variant Coding screen (2) ACU Coding Code entering screen (3) Rechecking ACU Coding Code entering screen (4) Variant Coding's proceeding screen-1 (5) Variant Coding's proceeding screen-2 (6) Variant Coding is completed 1. This screen is shown when you try variant coding on the SRSCM which has been performed before.

Front Impact Sensor (FIS) Components and Components Location

Components

1. Front right Impact Sensor (FIS)

2. Front left Impact Sensor (FIS)

Front Impact Sensor (FIS) Description and Operation

Description

•	The front impact sensors (FIS) are installed on the upper of the side panel in Front End Module (FEM). They are remote sensors that detect acceleration due to a collision at their mounting locations.

•	The primary purpose of the Front Impact Sensor (FIS) is to provide an indication of a collition. The Front Impact Sensor (FIS) sends acceleration data to the SRSCM.

Front Impact Sensor (FIS) Repair procedures

Removal

• Removal of the airbag must be performed according to the precautions/ procedures described previously. • Before disconnecting the front impact sensor connector, disconnect the front airbag connector(s). • Do not turn the ignition switch ON and do not connect the battery cable while replacing the front impact sensor.

1.	Disconnect the battery negative cable, and wait for at least three minutes before beginning work.

2.	Disconnect the front impact sensor connector (A).

3.	Remove the front impact sensor (A) after loosening the mounting bolt.

Installation

• Do not turn the ignition switch ON and do not contact the battery cable while replacing the front impact sensor.

1.	Install the new front impact sensor.

2.	Connect the front impact sensor connector.

3.	Install the front impact sensor mounting bolt. Tightening torque : 7.8 ~ 9.8 N.m ( 0.8 ~ 1.0 kgf.m, 5.8 ~ 7.2 lb-ft)

4.	Reconnect the battery negative cable.

5.	After installing the Front Impact Sensor, confirm proper system operation : A. Turn the ignition switch ON; the SRS indicator light should be turned on for about six seconds and then go off.

Side Impact Sensor (SIS) Components and Components Location

Components

1. Front Pressure Side Impact Sensor (P-SIS)

2. Front Gravity Side Impact Sensor (G-SIS)

Side Impact Sensor (SIS) Description and Operation

Description

•	Side Impact Sensors (SIS), each installed on the center part of the right and left front door modules and the right and left center pillars, detects side impact during collision.

•	The SRSCM uses the signals from SIS during side collision to determine whether and when to deploy the side air bag.

Side Impact Sensor (SIS) Repair procedures

Removal

Pressure Side Impact Sensor

• Removal of the airbag must be performed according to the precautions/procedures described previously. • Before disconnecting the side impact sensor connector(s), disconnect the side airbag connector(s). • Do not turn the ignition switch ON and do not connect the battery cable while replacing the side impact sensor.

1.	Disconnect the battery negative cable, and wait for at least three minutes before beginning work.

2.	Remove the front door trim. (Refer to Body - "Front Door Trim")

3.	Disconnect the pressure side impact sensor connector (A).

4.	Remove the side impact sensor (A) after loosening the side impact sensor mounting screws.

Gravity Side Impact Sensor

1.	Disconnect the battery negative cable and wait for at least three minutes before beginning work.

2.	Remove the door scuff trim. (Refer to Body - "Interior Trim")

3.	Remove the center pillar trim. (Refer to Body - "Interior Trim")

4.	Disconnect the side impact sensor connector (A).

5.	Remove the side impact sensor (A) after loosening the side impact sensor mounting bolt.

Installation

Pressure Side Impact Sensor

1.	Install the pressure side impact sensor with the screw then connect the pressure side impact sensor connector. Tightening torque : 2.0 ~ 2.9 N.m (0.2 ~ 0.3 kgf.m, 1.4 ~ 2.2 lb-ft)

2.	Install the front door trim. (Refer to Body - "Front Door Trim")

3.	Reconnect the battery negative cable.

4.

After installing the pressure side impact sensor, confirm proper system operation: A. Turn the ignition switch ON; the SRS indicator light should be turned on for about six seconds and then go off. • You must comply with the specified tightening torques with the tool specified because Pressure – Side Impact Sensors (P-SIS) may be broken or POP-NUT may be rotated. • Problems may be occurred in the durability of P-SIS or impact sensing performance may be depreciated if POP-NUT is rotated. • The door module must not be transformed because SRSCM judges a impact through the pressure sensor in the door module.

Gravity Side Impact Sensor

• Do not turn the ignition switch ON and do not connect the battery cable while replacing the side impact sensor.

1.	Install the side impact sensor with the bolt then connect the side impact sensor connector. Tightening torque : 7.8 ~ 9.8 N.m (0.8 ~ 1.0 kgf.m, 5.8 ~ 7.2 lb-ft)

2.	Install the center pillar trim. (Refer to Body - "Interior Trim")

3.	Install the door scuff trim. (Refer to Body - "Interior Trim")

4.	Reconnect the battery negative cable.

5.	After installing the Side Impact Sensor, confirm proper system operation : A. Turn the ignition switch ON; the SRS indicator light should be turned on for about six seconds and then go off.

Seat Belt Buckle Switch (BS) Components and Components Location

Components

1. Seat Belt Buckle Switch (BS)

Seat Belt Buckle Switch (BS) Description and Operation

Description

•	The SRSCM should detect the condition of seat belt buckles (BS) of the driver and passenger seats.

•	The SRSCM provides two pins to each side, in order to enter the condition of seat belt buckles (BS) of the driver and passenger seats.

•	The seat belt buckle circuit is operated using internal boost voltage supplied by the SRSCM, and uses body ground for signal return.

Seat Belt Buckle Switch (BS) Repair procedures

Removal

1.	Disconnect the battery negative cable, and wait for at least three minutes before beginning work.

2.	Remove the front seat assembly. (Refer to Body - "Front Seat Assembly")

3.	Remove the seat belt buckle switch (A) after loosening the seat belt buckle mounting bolt.

Installation

• Be sure to install the harness wires so they will not pinch or interfere with other parts.

1.	Remove the ignition key from the vehicle.

2.	Disconnect the battery negative cable, and wait for at least three minutes before beginning work.

3.	Install the seat belt buckle switch.

4.	Install the front seat assembly. (Refer to Body - "Front Seat Assembly")

5.	Reconnect the battery negative cable.

6.	After installing the seat belt buckle switch, confirm proper system operation.

Occupant Classification System (OCS) Components and Components Location

Components

1. Occupant Classification System (OCS) Unit

2. Occupant Classification System (OCS) Sensor

Occupant Classification System (OCS) Unit

Occupant Classification System (OCS) Description and Operation

Description

In order to make normal activation of airbag system, SRSCM detects DTC(s) for the Occupant Classification System (OCS). If the seat is occupied, OCS detects passenger presences status and send signal to SRSCM via CAN.

SRSCM recognizes the signal as 2(two) different classifications; that is, 1(Empty or small occupant with child restraint system), 2(Occupied with large occupant and small occupant).

With these signal, ACU determines whether it needs to deploy the PAB(Passenger Airbag) or not.

Occupant Classification System (OCS) Repair procedures

Removal

Occupant Classification System (OCS) Unit

1.	Disconnect the battery negative cable, and wait for at least three minutes before beginning work.

2.	Remove the front passenger seat assembly. (Refer to Body - "Front Seat Assembly")

3.	Disconnect the occupant classification system unit connector (A).

4.	Remove the occupant classification system unit (A) after loosening the mounting screws.

Occupant Classification System (OCS) Sensor

1.	Disconnect the battery negative cable, and wait for at least three minutes before beginning work.

2.	Remove the front passenger seat assembly. (Refer to Body - "Front Seat Assembly")

3.	Remove the front seat cushion assembly. (Refer to Body - "Front Seat Cushion Cover")

Installation

Occupant Classification System (OCS) Unit

1.	Install the occupant classification system unit on the Front seat track assembly.

2.	Connect the occupant classification system unit connector.

3.	Install the front passenger seat assembly. (Refer to Body - "Front Seat Assembly")

4.	Reconnect the battery negative cable.

5.

After installing the occupant classification system, confirm proper system operation. • Turn the ignition switch ON the SRS indicator should be turned on for about six seconds and then go off. • Telltale lamp will turn on for 4 seconds and be turned off for 3 seconds. After the 7 seconds, it shall remain off if the OCS does not require suppression and the passenger airbag is enabled. • Be sure to perform OCS reset with GDS after replacing OCS unit.

OCS Reset procedure

You should perform OCS Reset procedure after service or replacement about all part of the passenger seat. (Not included full seat assembly)

1.	Ignition "OFF", connect GDS.

2.	Ignition "ON" & Engine "OFF", select Airbag system and "Body Sensor Reset" mode.

3.	The GDS will show the two OCS Reset function steps. (1) Erase OCS diagnostic codes. (2) OCS initialization. • This Step must be done during front passenger seat empty.

4.

Select product configuration. (1) C1 : No heater (2) C2 : Heater • Before the starting the OCS Rest process, cross check seat correct configuration with actual vehicle. • If you see the center console, you can find different buttons per each different seat configuration type. (Refer to the below picture)

5.

The OCS initialization procedure will be performed. C1 : No Heater Type Reset C2 : Heater Type Reset (Including Cooling Seat) • Erase the SRSCM diagnostic codes after completing the OCS reset. DTC Code Code Name Description B176300 ECU Defect 1. Reset(Calibration setting) is not completed 2. ECU is damaged from physical stress B176400 MAT Defect 1. Mat and ECU are not connected . 2. Mat is damaged from physical stress. B17672F Algo cut-off 1. Too much humidity. B111117 IGN voltage high 1. IGN voltage high. B111216 IGN voltage low 1. IGN voltage low. B160388 CAN bus off 1. CAN Bus is not working. B169787 ACU communication error 1. CAN Bus is not working. 2. ACU is not working.