Supplemental Restraint System Control Module (srscm) Hyundai Santa Fe III

Description

The primary purpose of the SRSCM (Supplemental Restraints System Control Module) is to discriminate between an event that warrants restraint system deployment and an event that does not. The SRSCM must decide whether to deploy the restraint system or not. After determining that pretensioners and/or airbag deployment is required, the SRSCM must supply sufficient power to the pretensioners and airbag igniters to initiate deployment.

The SRSCM determines that an impact may require deployment of the pretensioners and airbags from data obtained from impact sensors and other components in conjunction with a safing function.

The SRSCM will not be ready to detect a crash or to activate the restraint system devices until the signals in the SRSCM circuitry stabilize.

It is possible that the SRSCM could activate the safety restraint devices in approximately 7 seconds after ignition ON but is guaranteed to fully function after prove-out is completed.

The SRSCM must perform a diagnostic routine and light a system readiness indicator at key-on. The system must perform a continuous diagnostic routine and provide fault annunciation through a warning lamp indicator in the event of fault detection. A serial diagnostic communication interface will be used to facilitate servicing of the restraint control system.

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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 «FLOOR CONSOLE ASSEMBLY»(/hyundai/santa-fe/iii-2012-2016/remont/exteriorinterior-trim/#floor-console) .
4. Loosen the bolts and then remove the rear air vent duct (A).
5. Pull up the lock, of the SRSCM connector, then disconnect the connector (A).
6. Remove the SRSCM mounting bolts (3EA) from the SRSCM, then remove the SRSCM. CAUTION: You must remove or install SRSCM or other SRS components with the ignition switch OFF to avoid accidental airbag deployment.

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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 with the SRSCM mounting bolts. Tightening torque: 7.8 ~ 9.8 N.m (0.8 ~ 1.0 kgf.m, 5.8 ~ 7.2 lb-ft) NOTE: Use new mounting bolts when replacing the SRSCM after a collision.
4. Connect the SRSCM harness connector.
5. Install the rear air vent duct and floor console. Refer to «FLOOR CONSOLE ASSEMBLY»(/hyundai/santa-fe/iii-2012-2016/remont/exteriorinterior-trim/#floor-console) .
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. CAUTION: SRSCM is sensing the vehicle rollover. SAB, CAB, BPT will be able to expanse if mechanic moves the SRSCM on vehicle during IGN ON state. For this reason, turn the IGN OFF surely and then remove the SRSCM from vehicle. If the SRSCM is replaced always perform variant coding. Also, perform the lateral G sensor 0 point setup. (Refer to «Variant coding»(/hyundai/santa-fe/iii-2012-2016/remont/airbag/#supplemental-restraint-system-control-module-srscm__variant-coding) .

Variant coding

After replacing the SRSCM, the "Variant Coding" must be performed.

Note. On SRSCM variant coding mode, the airbag warning lamp is periodically blinking (ON: 0.5sec., OFF: 0.5sec.) until the coding is normally completed. If the variant coding is failed, DTC B1762 (ACU Coding Error) will be displayed and the warning lamp will be turned 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 B1683 (Exceed Maximum coding Number) will be displayed and SRSCM must be replaced. If the battery voltage is low (less than 9V), DTC B1102 will be displayed. In this case, charge the battery before anything else, and then perform the variant coding procedure. DTC B1762 (ACU Coding Error) and B1102 (Battery Voltage Low) may be displayed simultaneously.

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1. On-Line type on GDS Ignition "OFF", connect GDS. Ignition "ON" & Engine "OFF" select vehicle name and airbag system. Select Variant coding mode. Follow steps on the screen as below. Initial ACU Variant Coding screen VIN Code entering screen Variant coding's proceeding screen-1 Variant coding's proceeding screen-2 Variant coding is completed NOTE: This screen is opened when you try the variant coding again on the SRSCM which has bee performed variant coding. Screen of communication failure
2. Off-line type on GDS (This can be used when not connecting to internet) Initial ACU Variant Coding screen ACU Coding Code entering screen Screen of rechecking ACU Coding code's entering Variant coding's proceeding screen-1 Variant coding's proceeding screen-2 Variant coding is completed NOTE: This screen is opened when you try the variant coding again on the SRSCM which has been performed variant coding.

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

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Removal

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1. Disconnect the battery negative cable, and wait for at least three minutes before beginning work.
2. Remove the front impact sensor mounting bolt (A).
3. Disconnect the front impact sensor connector.

Installation

1. Install the new front impact sensor.
2. Tighten the front impact sensor mounting bolt. Tightening torque: 6.8 ~ 9.2 N.m (0.7 ~ 0.94 kgf.m, 5.0 ~ 6.8 lb-ft)
3. Connect the front impact sensor connector.
4. Install the radiator upper cover and air duct.
5. Reconnect the battery negative cable.
6. After installing the Front Impact Sensor, 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.

Side Impact Sensor (SIS) system consists of two Pressure Side Impact Sensor (P-SIS) which are installed at each center of the front door module (LH and RH) and two rear SIS which are installed in the rear pillar (LH and RH).

Pressure Side Impact Sensor is also called P-SIS because it detects pressure due to collision at its mounting location.

Side Impact Sensor is also called A-SIS because it detects acceleration.

SRSCM decides deployment of the airbag and the time of deployment through the collision signal of the SIS when the collision occurred.

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Pressure Side Impact Sensor (P-SIS)

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1. Disconnect the battery negative cable, and wait for at least three minutes before beginning work.
2. Remove the front door trim. Refer to «FRONT DOOR TRIM»(/hyundai/santa-fe/iii-2012-2016/remont/exterior-body-panels/#front-door) .
3. Disconnect the pressure side impact sensor (A) connector and remove the pressure side impact sensor mounting screws.

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1. Disconnect the battery negative cable and wait for at least three minutes before beginning work.
2. Remove the luggage side trim. Refer to «LUGGAGE SIDE TRIM»(/hyundai/santa-fe/iii-2012-2016/remont/exteriorinterior-trim/#interior-trim) .
3. Disconnect the rear side impact sensor connector.
4. Loosen the rear side impact sensor mounting bolt and then remove the rear side impact sensor (A).

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1. Install the new pressure side impact sensor (A) with the screws then connect the pressure side impact sensor connector. Tightening torque: 3.9 ~ 5.9 N.m (0.4 ~ 0.6 kgf.m, 2.9 ~ 4.3 lb-ft) CAUTION: Use the specified screws only.
2. Install the front door trim. Refer to «FRONT DOOR TRIM»(/hyundai/santa-fe/iii-2012-2016/remont/exterior-body-panels/#front-door) .
3. Reconnect the battery negative cable.
4. After installing the pressure side impact sensor, 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. CAUTION: You must comply with the specified tightening torques with the tool specified because Pressure - Side Impact Sensors (P-SIS) may be broken or the 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.

Rear Side Impact Sensor

1. Install the new rear side impact sensor with a bolt and then connect the rear side impact sensor connector. Tightening torque: 6.8 ~ 9.2 N.m (0.7 ~ 0.94 kgf.m, 5.0 ~ 6.8 lb-ft)
2. Install the luggage side trim. Refer to «LUGGAGE SIDE TRIM»(/hyundai/santa-fe/iii-2012-2016/remont/exteriorinterior-trim/#interior-trim) .
3. Reconnect the battery negative cable.
4. After installing the Side Impact Sensor, 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.

The SRSCM shall monitor the status of the driver and front passenger seat belt buckle. The SRSCM provides one pin each for the driver and front passenger seat belt buckle status input. The seat belt buckle circuit operates from internal boost voltage supplied by the SRSCM, and uses chassis ground for the signal return. The buckle status shall modify the SRSCM deployment. If the buckle status is unbuckled, the corresponding pretensioner will not be deactivated.

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1. Disconnect the battery negative cable, and wait for at least three minutes before beginning work.
2. Remove the front seat assembly. Refer to «FRONT SEAT»(/hyundai/santa-fe/iii-2012-2016/remont/seats/#seat-electrical) .
3. Loosen the seat belt buckle mounting bolt and remove the seat belt buckle switch (A).

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. Tightening torque: 39.2 ~ 53.9 N.m (4.0 ~ 5.5 kgf.m, 28.9 ~39.8 lb-ft)
4. Install the front seat assembly. Refer to «FRONT SEAT»(/hyundai/santa-fe/iii-2012-2016/remont/seats/#seat-electrical) .
5. Reconnect the battery negative cable.
6. After installing the seat belt buckle switch, confirm proper system operation: Turn the ignition switch ON; the SRS indicator should be turned on for about six seconds and then go off.

In order to make normal activation of airbag system, SRSCM detects DTC(s) for the Passive occupant detection system (PODS-F). If the seat is occupied, PODS-F 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.

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PODS-F ODU (Occupant Detection 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 «FRONT SEAT»(/hyundai/santa-fe/iii-2012-2016/remont/seats/#seat-electrical) .
3. Disconnect the PODS-F ODU connector.
4. Remove the PODS-F ODU.

PODS-F Mat

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 «FRONT SEAT»(/hyundai/santa-fe/iii-2012-2016/remont/seats/#seat-electrical) .
3. Disconnect the PODS-F mat connector.
4. Remove the front seat cushion assembly Refer to «FRONT SEAT CUSHION COVER»(/hyundai/santa-fe/iii-2012-2016/remont/seats/#front-seat) .

PODS-F ODU

1. Install the PODS-F ODU on the Front seat track assembly.
2. Connect the PODS-F ODU connector.
3. Install the front passenger seat assembly. Refer to «FRONT SEAT»(/hyundai/santa-fe/iii-2012-2016/remont/seats/#seat-electrical) .
4. Reconnect the battery negative cable.
5. After installing the PODS-F, 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 PODS-F does not require suppression and the passenger airbag is enabled. NOTE: Be sure to perform PODS-F reset with GDS after replacing PODS-F ODU in the seat track.

1. Install the PODS-F Mat equipped seat cushion assembly on the front seat assembly. Refer to «FRONT SEAT»(/hyundai/santa-fe/iii-2012-2016/remont/seats/#seat-electrical) .
2. Connect the PODS-F mat connector.
3. Install the front passenger seat assembly. Refer to «FRONT SEAT»(/hyundai/santa-fe/iii-2012-2016/remont/seats/#seat-electrical) .
4. Reconnect the battery negative cable.
5. After installing the PODS-F, 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 PODS-F does not require suppression and the passenger airbag is enabled. NOTE: Be sure to perform PODS-F zeroing with GDS after replacing PODS-F equipped seat cushion.

PODS-F zeroing Procedure

You should perform PODS-F Re-zero procedure after service or replacement about all part of the passenger seat.

1. Seat assembly, Seat foam and Seat Cushion Assembly Replacement (PODS-F ODU No Replacement): C1[Auto]
2. PODS-F ODU Replacement: C2[Manual]

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1. Ignition "OFF", connect GDS.
2. Ignition "ON" & Engine "OFF", select Airbag system and "PODS-F Reset" mode.
3. Select C1. C1[Auto]: When replacing seat assembly or Seat foam.
4. The GDS will show the two PODS-F Zeroing function steps. Erase PODS-F diagnostic codes. PODS-F initialization. CAUTION: This step must be done PODS-F re-zero, when the front passenger seat is empty.
5. The PODS-F initialization procedure will be performed. [Heater type] [No heater type] [Vent heater type] CAUTION: Erase the SRSCM diagnostic codes after completing the PODS-F zeroing.

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1. Ignition "OFF", connect GDS.
2. Ignition "ON" & Engine "OFF", select Airbag system and "PODS-F Reset" mode.
3. Select C2. C2[Manual]: When replacing PODS-F ODU
4. Select seat type.
5. The GDS will show the two PODS-F Zeroing function steps. Erase PODS-F diagnostic codes. PODS-F initialization. CAUTION: This step must be done PODS-F re-zero, when the front passenger seat is empty.
6. The PODS-F initialization procedure will be performed. [Heater type] [No heater type] [Vent heater type] CAUTION: Erase the SRSCM diagnostic codes after completing the PODS-F zeroing NOTE: In case of zeroing failure Fail Code 2: PODS ECU Fault Fail Code 3: sensor short Fail Code 4: Sensor Open Fail Code 8: Wet seat Fail Code 9: Empty seat or seat type mismatch Fail Code 10: Electronic noise is too much Fail Code A: Spilt water on the Seat Fail Code B: Wet Seat foam Fail Code D: Humidity is too High Fail Code E: Temperature is too low

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See also:
• FLOOR CONSOLE ASSEMBLY
• FRONT DOOR TRIM
• LUGGAGE SIDE TRIM
• FRONT SEAT
• FRONT SEAT CUSHION COVER
• Variant coding