Hyundai Ioniq: SRSCM / SRS Control Module (SRSCM). Repair procedures

Hyundai Ioniq (AE) 2017-2024 Service Manual / Restraint / SRSCM / 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.

    SRS Control Module (SRSCM). Components and components location

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    Hyundai Ioniq (AE) 2017-2024 Service Manual: Engine Control Module (ECM). Schematic diagrams


    ECM Terminal and Input / Output SignalECM Terminal FunctionConnector [C100-A] Pin No Description Connected to 1Injector (Cylinder #3) [Low] control outputInjector (Cylinder #3)2Injector (Cylinder #4) [High] control outputInjector (Cylinder #4)3Injector (Cylinder #3) [Low] control outputInjector (Cylinder #3)4Vehicle speed signal outputCluster5EGR Valve (Motor -)EGR Valve6Sensor power (+5V)Throttle Position Sensor (TPS) 1, 27Sensor power (+5V)EGR Valve8Knock Sensor (KS) signal inputKnock Sensor (KS)9Camshaft Position Sensor (CMPS) [Bank 1 / Exhaust] signal inputCamshaft Position Sensor (CMPS) [Bank 1 / Exhaust]10-11Brake Switch [test] signal inputBrake Switch12Brake Switch [lamp] signal inputBrake Switch13-14-15-16Injector (Cylinder #3) [High] control outputInjector (Cylinder #3)17Injector (Cylinder #1) [High] control outputInjector (Cylinder #1)18Injector (Cylinder #1) [Low] control outputInjector (Cylinder #1)19-20EGR Valve (Motor +)EGR Valve21Sensor shieldKnock Sensor (KS)22Sensor groundKnock Sensor (KS)23-24Sensor groundCamshaft Position Sensor (CMPS) [Bank 1 / Exhaust]25-26-27-28-29-30-31Injector (Cylinder #2) [High] control outputInjector (Cylinder #2) 32-33ETC Motor [-] control outputETC Motor34Sensor groundThrottle Position Sensor (TPS) 1, 235Throttle Position Sensor (TPS) 1 signal inputThrottle Position Sensor (TPS) 136Sensor groundRail Pressure Sensor (RPS)37Rail Pressure Sensor (RPS) signal inputRail Pressure Sensor (RPS)38-39Camshaft Position Sensor (CMPS) [Bank 1 / Intake] signal inputCamshaft Position Sensor (CMPS) [Bank 1 / Intake]40-41-42-43VS-/IP- (Common Ground for VS, IP)Heated Oxygen Sensor [Bank 1 / Sensor 1] 44Rc (Compensative Resistance)Heated Oxygen Sensor [Bank 1 / Sensor 1] 45Sensor groundHeated Oxygen Sensor [Bank 1 / Sensor 2] 46Injector (Cylinder #2) [Low] control outputInjector (Cylinder #2)47-48ETC Motor [+] control outputETC Motor49-50Throttle Position Sensor (TPS) 2 signal inputThrottle Position Sensor (TPS) 251Sensor power (+5V)Rail Pressure Sensor (RPS)52Electrical load signal inputWiper Motor53Sensor groundCamshaft Position Sensor (CMPS) [Bank 1 / Intake]54Sensor groundEGR valve55EGR valve (Feedback signal)EGR valve56-57-58VS+ (NERNST Cell Voltage)Heated Oxygen Sensor [Bank 1 / Sensor 1] 59Rc/Rp (Pump Cell Voltage)Heated Oxygen Sensor [Bank 1 / Sensor 1] 60Heated Oxygen Sensor [Bank 1 / Sensor 2] signal inputHeated Oxygen Sensor [Bank 1 / Sensor 2] Connector [C100-K] Pin No Description Connected to 1ECM GroundChassis Ground2Battery power (B+)Main Relay3ECM GroundChassis Ground4Battery power (B+)Main Relay5ECM GroundChassis Ground6Battery power (B+)Main Relay7Fuel Pressure Control Valve [High] control outputFuel Pressure Control Valve8-9-10Engine Coolant Temperature Sensor (ECTS) signal [EGR Cooler Tube]Engine Coolant Temperature Sensor (ECTS) [EGR Cooler Tube]11Sensor groundEngine Coolant Temperature Sensor (ECTS) [EGR Cooler Tube]12Vehicle speed signal inputIntegrated brake actuation unitSmart key Control Module13-14-15Accelerator Position Sensor (APS) 2 signal inputAccelerator Position Sensor (APS) 216Sensor power (+5V) Accelerator Position Sensor (APS) 217Sensor power (+5V) Manifold Absolute Pressure Sensor (MAPS)18Sensor power (+5V) Accelerator Position Sensor (APS) 119Accelerator Position Sensor (APS) signal inputAccelerator Position Sensor (APS) 120Sensor power (+5V) Crankshaft Position Sensor (CKPS) A/C Pressure Transducer (APT)21-22-23-24Fuel Pump Relay control outputFuel Pump Relay25-26-27-28-29Fuel Pressure Control Valve [Low] control outputFuel Pressure Control Valve30A/C Pressure Transducer (APT) signal inputA/C Pressure Transducer (APT)31-32Crankshaft Position Sensor (CKPS) signal inputCrankshaft Position Sensor (CKPS) 33-34-35-36-37Sensor groundAccelerator Position Sensor (APS) 238Manifold Absolute Pressure Sensor (MAPS) signal inputManifold Absolute Pressure Sensor (MAPS)39Intake Air Temperature Sensor (IATS) signal inputIntake Air Temperature Sensor (IATS)40Sensor groundManifold Absolute Pressure Sensor (MAPS)41Sensor groundAccelerator Position Sensor (APS) 142-43-44Mass Air Flow Sensor (MAFS) signal inputMass Air Flow Sensor (MAFS) 45Sensor groundMass Air Flow Sensor (MAFS) 46Engine Control Relay control outputMain Relay47CVVT Oil control solenoid (OCS) [Bank 1 / Intake] control outputCVVT Oil control solenoid (OCS) [Bank 1 / Intake]48-49-50-51Battery power (B+)Ignition Switch52-53-54Sensor groundCrankshaft Position Sensor (CKPS) 55P-CAN [High]Other control module, Data Link Connector (DLC), Multi-Purpose Check Connetor56H-CAN [High]Other control module, Data Link Connector (DLC), Multi-Purpose Check Connetor57-58Immobilizer communication lineSmart key Control Module59-60Engine Coolant Temperature Sensor (ECTS) signal input [Water Temperature Control Assembly]Engine Coolant Temperature Sensor (ECTS) [Water Temperature Control Assembly]61Sensor groundEngine Coolant Temperature Sensor (ECTS) [Water Temperature Control Assembly]62Fuel Level Sender (FLS) signal inputFuel Level Sender (FLS)63-64Ignition Coil (Cylinder #2) control outputIgnition Coil (Cylinder #2)65Ignition Coil (Cylinder #3) control outputIgnition Coil (Cylinder #3)66-67-68Cooling Fan Relay control outputCooling Fan Relay69-70CVVT Oil Control (OCV) Valve [Bank 1 / Exhaust] control outputCVVT Oil Control Valve (OCV) [Bank 1 / Exhaust] 71- 72- 73Battery power (B+)Battery74- 75Sensor groundA/C Pressure Transducer (APT)76LIN communication signal inputBattery Sensor77P-CAN [Low]Other control module, Data Link Connector (DLC), Multi-Purpose Check Connetor78H-CAN [Low]Other control module, Data Link Connector (DLC), Multi-Purpose Check Connetor79- 80- 81- 82- 838485- 86Ignition Coil (Cylinder #4) control outputIgnition Coil (Cylinder #4)87Ignition Coil (Cylinder #1) control outputIgnition Coil (Cylinder #1)88- 89- 90-91Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor1] Heater control outputHeated Oxygen Sensor (HO2S) [Bank 1 / Sensor 1]92Heated Oxygen Sensor (HO2S) [Bank 1 / Sensor2] Heater control outputHeated Oxygen Sensor (HO2S) [Bank 1 / Sensor 1]93Purge Control Solenoid Valve (PCSV) control outputPurge Control Solenoid Valve (PCSV)94-ECM Terminal Input/Output Signal Connector [C100-A] Pin No Description Condition Type Level 1IInjector (Cylinder #3) [Low] control outputRelay OFFDC71VRelay ONMax 1...

    Hyundai Ioniq (AE) 2017-2024 Service Manual: Specifications


    Specification[Motor] Item Specification Coil Resistance (Ω)2.37 - 2.7 [Position Sensor] Item Specification Opened Voltage (V) 0...

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