In this guide, you will find instructions on how to replace the alternator on a Hyundai vehicle.
Hyundai Airbag Light Stay On | Troubleshooting Guide
In this guide, we will go over the airbag warning lights on a Hyundai, how to perform airbag light reset, and common causes that can trigger Hyundai airbag light.
What does Hyundai Airbag Light Mean?
A common problem Hyundai owners experience is the airbag light staying on constantly. If your Hyundai airbag light stays on when driving, it means that there is a problem with the airbag system or a sensor has failed. The airbags in your car may not deploy in case of an accident.
The Airbag System does a quick self-check of all the sensors and components. If no problems are found, the airbag light on your Hyundai should turn off. If there are any problems with any of the components, the light stays on.
Before you start troubleshooting the airbag light on your Hyundai, we recommend that you verify your Hyundai dealer to check if your vehicle is still under warranty. If your Hyundai is still under warranty, your dealer may repair your car free of charge.
How to Diagnose & Reset Hyundai Airbag Light
- Never measure the circuit resistance of an airbag component, even with a digital multi-meter. If the circuit resistance is measured with a tester, accidental airbag deployment can occur, resulting in serious personal injury.
- When working on the airbag system, always disconnect the negative battery terminal first and wait at least 10 min before starting work.
This section will show you how you can read, erase, or clear Hyundai airbag light using an Airbag Scanner for Hyundai. Generic OBD2 scanners can not read airbag fault codes.
Airbag system fault codes are stored in the Airbag Module (SRS Control Unit) provide accurate information describing why the airbag light is on.
- Locate the OBD-II port under the dashboard.
- Plug-in the scanner that can read airbag fault codes on a Hyundai.
- Turn the ignition to position II. All the dashboard lights turn on but don't start your Hyundai. The airbag light comes on and stays on as well.
- Select the Hyundai, then select the model (Elantra, Tucson, Accent, Santa Fe, Sonata, Genesis, Azera, Veloster, Equus, etc.)
- Select airbag / SRS in the menu.
- Select Read Codes. The scanner will communicate with the airbag control module and retrieve the fault codes. You may get a code such as B1620 - Airbag unit internal failure.
- If all the codes are in Stored status, go back one level, and select Clear Codes. Follow on-screen prompts to clear the airbag fault codes from your Hyundai control unit.
Note that certain codes cannot be erased if you haven't fixed the problem that triggered the airbag light in the first place. In other words, if an internal fault code is active or if a crash is recorded, you won't be able to turn off the airbag light until you address these problems.
To read and clear the airbag light on your Hyundai, you will need an OBD II diagnostic scanner to retrieve airbag codes. Many Hyundai owners try to turn off the airbag light using a generic OBD-II code reader, but such scanners can't reset the light of Hyundai airbag.
Low Battery Voltage
The airbag light may have turned on and stayed on after you jump start your Hyundai. This is typically caused due to the car battery being discharged and not providing the airbag module's necessary voltage to function properly. If the battery voltage drops below 9 volts, your Hyundai airbag light will come on and stay on until you clear the codes.
When you scan the airbag module, you will get a fault code that states that the airbag control unit was detected under-voltage. Make sure you replace your old battery (or fix any alternator problems). Otherwise, the airbag warning light will turn back on.
Seat Belt Buckle Defective
In certain Hyundai models, the seat belt buckle sensor wears out and eventually triggers the airbag warning light.
This is because the microswitch inside the seat belt buckle wears out over time and eventually fails to function properly. The least expensive way to fix this problem is to replace the seat belt buckle.
Side Impact Sensor
Side impact airbag sensor can be the culprit in some cases. The sensor is installed in the B-pillar or door panel. If the side impact sensor fails, it will need to be replaced. Check the resistance of the side impact sensor.
It should be between 1.7 and 2.3 ohms. Once the sensor is replaced, clear the fault codes, as described in this article.
Side impact sensor mounted on the door panel.
Airbag module high resistance
Due to a damaged wire harness or damaged clockspring, the airbag light may develop a high resistance code.
Do not use a multimeter to test airbag components because the multimeter may deploy the airbag, leading to injuries.
Passenger Seat Sensor / Occupancy Sensor
Under the bottom cushion of the passenger seat of your Hyundai, you will find a weight sensor. Hyundai calls this Weight Classification System (WCS), and its main purpose is to detect if a light person or child is sitting in the front passenger seat. These sensors fail over time and often trigger the airbag light to illuminate on your Hyundai dashboard.
If the fault code (also referred to as Diagnostic Trouble Code -DTC) points to the passenger seat's weight sensor, first check the wires under the seat. The electrical connector for the seat occupancy sensor often gets disconnected due to the frequent seat movement. In some cases, the weight sensors need to be replaced to fix this specific Hyundai airbag light problem.
All Hyundai vehicles, including Accent, Sonata, Santa Fe, Elantra, Genesis, and Azera, are equipped with Supplemental Restraint System (SRS), often referred to as the airbag system in your vehicle. The Airbag System has many components, including the SRS control module, retractors, retractor pre-tensioner assembly, crash and impact sensors, etc.
Why is my Hyundai Airbag Warning Light On?
The airbag module continuously monitors all the components that make up the airbag system. If the SRS module detects a sensor failure or high resistance to any of the sensors while the vehicle power supply is on, the system stores a fault code in the SRS Control Unit. Once the airbag module detects a fault, it will warn the driver by illuminating the SRS / Airbag warning light on the instrument cluster. That's how you, the driver know there is a problem with your airbag system. These codes can be retrieved and cleared with the Hyundai GDS scanner or an advanced OBD2 scanner, as described in this article.
If the airbag light never comes on, check the fuses under the dash. In the fuse box, you will see a 15A fuse dedicated to the Airbag or A/Bag. Inspect this fuse and replace if necessary.
Why is my Hyundai Airbag Light Flashing?
If the airbag light on your Hyundai is flashing that is because the airbag module (SRSCM - SRS Control module1) is either defective, isn't programmed correctly or it has been replaced but not programmed. When you install a new Hyundai airbag module, you need to perform variant coding. You will need to take your Hyundai to the dealer or a specialized auto repair shop that can complete variant coding on your airbag module.
Show Airbag Fault Codes
When you scan your Hyundai for fault codes you will get one of the following codes.
B1102 Battery Voltage Low B1326 FIS Front Impact Sensor Driver Short to Ground B1327 FIS Front Impact Sensor Driver Short to Battery B1328 FIS Front Impact Sensor Driver Defect B1101 Battery Voltage High B1329 FIS Front Impact Sensor Driver Communication error B1333 FIS Front Impact Sensor Passenger Defect B1334 FIS Front Impact Sensor Passenger Communication error B1335 FIS Front Impact Sensor Passenger Wrong ID B1330 FIS Front Impact Sensor Driver Wrong ID B1331 FIS Front Impact Sensor Passenger Short to Ground B1332 FIS Front Impact Sensor Passenger Short to Battery B1341 Remote Crash Sensors Cross Coupling B1346 Driver Airbag Resistance too High (1st stage) B1347 Driver Airbag Resistance too Low (1st stage) B1348 Driver Airbag resistance circuit short to Ground (1st stage) B1349 Driver Airbag resistance circuit short to Battery (1st stage) B1352 Passenger Airbag Resistance too High (1st Stage) B1353 Passenger Airbag Resistance too Low (1st stage) B1354 Passenger Airbag Resistance Circuit Short to Ground (1st Stage) B1355 Passenger Airbag Resistance Circuit Short to Battery (1st Stage) B1361 Pre-tensioner Front-Driver Resistance too High B1362 Pre-tensioner Front-Driver Resistance too Low B1363 Pre-tensioner front-Driver resistance circuit short to Ground B1364 Pre-tensioner front-Driver resistance circuit short to Battery B1367 Pre-tensioner Front-Passenger Resistance too High B1368 Pre-tensioner Front-Passenger Resistance too Low B1369 Pre-tensioner Front-Passenger Resistance Circuit Short to Ground B1370 Pre-tensioner Front-Passenger Resistance Circuit Short to Battery B1378 Side Airbag Front-Driver Resistance too High B1379 Side Airbag Front-Driver Resistance too Low B1380 Side Airbag Front-Driver Resistance Circuit Short to Ground B1381 Side Airbag Front-Driver Resistance Circuit Short to Battery B1382 Side Airbag Front-Passenger Resistance too High B1383 Side Airbag Front-Passenger Resistance too Low B1384 Side Airbag Front-Passenger Resistance Circuit Short to Ground B1385 Side Airbag Front-Passenger Resistance Circuit Short to Battery B1395 Firing Loops Interconnection Fault B1400 SIS-Side Impact Sensor Front-Driver defect B1401 SIS Side Impact Sensor Front-Driver Circuit Short to Ground B1402 SIS Side Impact Sensor Front-Driver Circuit Short to Battery B1403 SIS Side Impact Sensor Front-Passenger Defect B1404 SIS Side Impact Sensor Front-Passenger Circuit Short to Ground B1405 SIS Side Impact Sensor Front-Passenger Circuit Short to Battery B1409 SIS-Side Impact Sensor Front-Driver Communication Error B1410 SIS-Side Impact Sensor Front-Passenger Communication Error B1414 SIS Side Impact Sensor Front-Driver Wrong ID B1415 SIS-Side Impact Sensor Front-Passenger Wrong ID B1473 Inflatable Curtain Airbag Front-Driver Resistance too High B1474 Inflatable Curtain Airbag Front-Driver Resistance too Low B1475 Inflatable Curtain Airbag Front-Driver Resistance Circuit Short to Ground B1476 Inflatable Curtain Airbag Front-Driver Resistance Circuit Short to Battery B1477 Inflatable Curtain Airbag Front-Passenger Resistance too High B1478 Inflatable Curtain Airbag Front-Passenger Resistance too Low B1479 Inflatable Curtain Airbag Front-Passenger Resistance Circuit Short to Ground B1480 Inflatable Curtain Airbag Front-Passenger Resistance Circuit Short to Battery B1481 Driver Airbag Resistance too High(2nd stage) B1482 Driver Airbag Resistance too Low(2nd stage) B1483 Driver Airbag Resistance Circuit Short to Ground(2nd stage) B1484 Driver Airbag Resistance Circuit Short to Battery(2nd stage) B1485 Passenger Airbag Resistance too High(2nd stage) B1486 Passenger Airbag Resistance too Low(2nd stage) B1487 Passenger Airbag Resistance Circuit Short to Ground(2nd stage) B1488 Passenger Airbag Resistance Circuit Short to Battery(2nd stage) B1489 PODS(Passenger Occupant Detecting System) ECU Defect B1490 PODS(Passenger Occupant Detecting System) Sensor(Bladder) Defect B1493 PODS(Passenger Occupant Detecting System) Communication error B1494 PODS(Passenger Occupant Detecting System) Wrong ID B1495 BTS(Belt-Tension Sensor) Defect B1496 PODS(Passenger Occupant Detecting System)Not calibrated B1511 Buckle Switch Driver open or short to Battery B1512 Buckle Switch Driver short or short to Ground B1513 Buckle Switch Passenger open or short to Battery B1514 Buckle Switch Passenger short or short to Ground B1515 Buckle Switch Driver Defect B1516 Buckle Switch Passenger Defect B1517 Buckle Switch Driver Instability B1518 Buckle Switch Passenger instability B1620 Internal fault-Replace SRSCM B1650 Crash Recorded in 1st Stage Only(Frontal-Replace SRSCM) B1651 Crash Recorded in Front-Driver Side Airbag(Replace SRSCM) B1652 Crash Recorded in Front-Passenger Side Airbag(Replace SRSCM) B1657 Crash Recorded in Belt Pre-tensioner only B1658 Belt Pre-tensioner 6 times Deployment B1670 Crash recorded in full stage(Frontal-Replace SRSCM) B1683 Exceed Maximum Coding Number B1684 ACU Configuration is different B1738 P-SIS front â€“ Driver Wrong ID B1739 P-SIS Front-Driver Defect B1740 P-SIS Front-Driver Short to Ground B1741 P-SIS Front-Driver Short to Battery B1742 P-SIS Front-Driver Communication Error B1744 P-SIS front - Passenger Wrong ID B1745 P-SIS Front-Passenger Defect B1746 P-SIS Front-Passenger Short to Ground B1747 P-SIS Front Passenger Short to Battery B1748 P-SIS Front-Passenger Communication Error B1762 ACU Coding Error B2502 Passenger Airbag Telltale Lamp Failure B2500 Warning lamp Failure
Hyundai Airbag Components and Location.Pre-tensioners,,
- Driver Airbag (DAB) Module and Clock Spring
- Driver steering wheel
- Passenger Airbag (PAB) Module
- Side Airbag (SAB) Module
- In the front seat. The outer side of the seat.
- Curtain Airbag (CAB) Module
- Supplemental restraint system (SRS)
- SRSCM (SRS Control Module)3
- Under the center console. Behind the cigarette outlet.
- Seat Belt Pre-tensioners (BPT)
- Anchor Pre-tensioner (APT)
- Front Impact Sensor (FIS)
- By the headlights. Left and right.
- Pressure Side Impact Sensor (PSIS)
- Side Impact Sensor (SIS)
- Either on the door panel or B-pillar.
- Seat Track Position Sensor (STPS)
- Weight Classification System (WCS)
How much does it cost to fix the airbag light on a Hyundai?
If you call your Hyundai dealer or your local auto repair shop, they will ask you to take the car in for an airbag light diagnostics, ranging between $80 and $130. You can diagnose Hyundai airbag light yourself following the instructions on this page.
The dealer does the same diagnostics. The dealer will connect their diagnostic scanner to the OBD-2 port and read the airbag module's fault codes. After they read the fault codes, they have a better idea of what is wrong with your Hyundai and write you up a quote on how much it will cost to fix the airbag light on your Hyundai.
It could be something as simple as the airbag light needing clearing (which you can reset if you have the right scanner), a defective clock spring, or a problem with the passenger seat weight sensor. Common Hyundai Airbag Light ON Causes
Always read the airbag fault codes before you start replacing any components of the airbag system.
Published on: Saturday, November 4, 2017.