Note on airbag fault memory diagnosis



The fault is current when the fault code is displayed against a black background.

Depending on the type of fault, detailed information on faults or partial data also appear for most faults

>Ω Resistance too high

<Ω Resistance too low

  - Short-circuit to -

 + Short-circuit to +

-//- Open-circuit

For most fault codes the following additional information such as fault frequency/operating time can be read out using the button.

Fault frequency

The number of times a fault has occurred, for example: 5, temporary fault occurred
5 times, disappeared 5 times.

Operating time

The time which has elapsed since a fault occurred.

The time which has elapsed since the fault disappeared.

Actual values

Four displays are possible:

, , , 

 The respective values are within the specified value.

 The respective values are not within the specified value

 Seat belt buckle fastened, front passenger seat occupied, MB Babysafe child seat recognized

 Seat belt buckle not fastened, front passenger seat not occupied, MB Babysafe child seat not recognized

In contrast to the fault memory, the actual values are constantly updated even during diagnosis so that, for example an intermittent fault can be determined by shaking the components, connectors or wiring harness.

Version of control modules

The following information can be read out for the airbag control modules and the side airbag sensors:

 Model

 Manufacturing location

 Date of manufacture

 Module date code (as of 12/96 module date code only)