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Sunday, July 25, 2010

How to Check if Air bag Warning Light On

How to check if airbag warning light on always.
What may be the cause of airbag indicator light on always.

Model: Hyundai Azera

Year Model: 2009

Fuel: Gasoline

Displacement: 3300cc

1) Condition

  1. Esp/Airbag warning light is “On” when driving.

2) Cause

  1. Internal fault of steering angle sensor.

3) Diagnosis

  1. Scan tool check.
    = Trouble code ( C1260 – Steering Angle Sensor Signal.
    =General Description.
    =The steering angle sensor (SAS) joined to the multifunction switch and using a CAN communication.The SAS is composed of main gear,serve gear 1 and serve gear 2 to determine the turning direction. If main gear is rotated according to the rotation of the steering wheel gear serve 1 serve gear 2, which is contact with main gear, will be rotated.
    =The HECU detects the absolute angle by using magnetic MR effects and the different gear ratio of each serve gear and then send to the  CAN communication line.
    =The HECU detects the steering wheel’s operating wheel speed and operating wheel angle by using absolute angle , and this signal is used as input signal of anti-roll control.
    = If the SAS signal is different from calculated value by Yaw-rate sensor and wheel speed sensor,mechanically impossible  SAS signal is detected , there is a different between SAS signal and driving condition of the vehicle calculated from the Yaw-rate sensor and later G-sensor , a failure is detected.
  2. Possible cause.Short of steering angle sensor,Faulty steering angle sensor,Faulty HECU.
  3. Current data monitoring
    Steering angle sensor ( 0 ) degrees always.
  4. Replace Steering angle sensor. then calibrate with GDS or G-Scan.
    =the problem disappeared.

4) Repair Guides

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