Hyundai Elantra (CN7): SRSCM / SRS Control Module (SRSCM)

Hyundai Elantra (CN7) 2021-2026 Service Manual / Restraint / SRSCM / 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).

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

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

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 adapted road limiter - High (+)
5	Driver airbag 1st stage - Low (-)	Driver adapted road limiter - Low (-)
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 (-)	Passenger seat belt buckle sensor - High (+)
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)	-
18	C-CAN (Low)	-
19	B +	Driver curtain airbag - High (+)
20	Passenger airbag OFF lamp	Driver curtain airbag - Low (-)
21	-	Passenger curtain airbag - Low (-)
22	-	Passenger curtain airbag - High (+)
23	-	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)	Driver seat belt buckle sensor - High (+)
28		Driver rear seat belt pretensioner - High (+)
29		Driver rear seat belt pretensioner - Low (-)
30		Passenger rear seat belt pretensioner - High (+)
31		Passenger rear seat belt pretensioner - Low (-)
32		-
33		-
34		-
35		-
36		-
37		-
38		-
39		-

Repair procedures

Removal

Turn the ignition switch OFF and disconnect the battery negative (-) cable.

•	Disconnect the battery negative cable from the battery and then wait for at least 3 minutes.

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

3.	Remove the center console duct (A).

Pull up the lock of the SRSCM connector to disconnect the connector (A).

•	Be careful SRSCM connector damage.

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

Installation

Check if the battery (-) cable is disconnected.

•	Disconnect the battery negative cable from the battery and then wait for at least 3 minutes.

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)

3.	Connect the SRSCM harness connector.

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

5.	Reconnect the battery negative cable.

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 turns off.

Adjustment

[Variant Coding]

1.	Connect the cable of diagnostic tool to the data link connector in driver side crash pad lower panel, and turn on the diagnostic tool.

2.	Select the 'S/W Management' and 'Car model'.

3.	Select "Airbag" and "ACU/SRSCM Variant Coding".

4.	Perform the "ACU/SRSCM Variant Coding" procedure according to the GDS screen message.

[Longitudinal G Sensor Calibration]

1.	Connect the cable of diagnostic tool to the data link connector in driver side crash pad lower panel, and turn on the diagnostic tool.

2.	Select the 'S/W Management' and 'Car model'.

Select "Longitudinal G Sensor Calibration".

•	You must remove or install the SRSCM or other SRS components with the ignition switch OFF to avoid accidental airbag deployment.

❮Components and components location

Components1. Front impact sensor (FIS)2. Supplemental Restraint System Control Module (SRSCM)3. Front impact sensor (FIS)4. Gravity side Impact Sensor (G-SIS)5.

Front Impact Sensor (FIS)❯

Description and operation DescriptionThe front impact sensor (FIS) is installed in the Front End Module (FEM). They are remote sensors that detect acceleration due to a collision at its mounting location.

Other information:

Hyundai Elantra (CN7) 2021-2026 Service Manual: Mode Control Actuator

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Hyundai Elantra (CN7) 2021-2026 Service Manual: Description and operation

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