MSC diagnosis previous knowledge notes on fault code - AD88.79-P-2000-03A

The fault memory can only be read out with the Hand-Held Tester.

The fault codes of a system can be filed in several control modules, therefore the fault memory is to be read out in all control modules relevant to the system.

When the fault memory is read out, all the faults stored in the control module appear, i.e. fault codes may also appear which do not affect the system currently being read out.

Faults not relevant to a system are described in the respective system.

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 positive

Short-circuit to negative

Cable open-circuit

Additional information such as fault frequency can be read out for some fault codes.

Fault frequency 

The number of times a fault has occurred, for example:

4 = temporary fault, occurred 4 times