Hyundai Elantra Owners and Service Manuals

Hyundai Elantra: SRSCM / SRS Control Module (SRSCM)

Hyundai Elantra (CN7) 2021-2025 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
1.
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).

4.
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
1.
Check if the battery (-) cable is disconnected.
   
•
Disconnect the battery negative cable from the battery and then wait for at least 3 minutes.
2.
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.
6.
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'.

3.
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.

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