Diagnostic modes
During normal operation, the control unit operates in the malfunction signaling mode. After the ignition is turned on, the airbag indicator lights up for 7 seconds and then goes out. This indicates that there are no malfunctions.
If the malfunction indicator starts flashing at a frequency of 1 Hz after 7 seconds, a malfunction has been detected in the system. If the indicator lights continuously for more than 7 seconds, this indicates either a malfunction of the system or an airbag deployment. If the indicator does not light after the ignition is turned on, this indicates a short circuit or break in the circuit of the indicator or control unit.
The control unit in a system with one airbag does not have additional self-diagnostic capabilities.
In a dual airbag system, you can put the control unit into diagnostic mode by turning off the ignition, opening the driver's door, turning on the ignition and pressing the door switch at least 5 times within 7 seconds of turning on the ignition.
After this, the indicator will either start to flash periodically (there is no fault), or will start to display a fault code in the form of a sequence of short flashes, as shown in the figure.
After repairing the system, turn off the ignition, then turn it on again and press the switch on the driver's door at least 5 times within 7 seconds after turning on the ignition. The control unit will enter the malfunction alarm mode.
| Fault code (number of flashes) | Transcript |
| 0 | No fault found |
| 2 | Driver air bag module circuit faulty |
| 7 | The control unit is faulty |
| 8 | Passenger air bag module circuit faulty |