Computers and Control Systems

General


NOTE: In order to ensure that a fault is no longer present after a repair or after the fault memory has been erased, a short test or test drive should be performed. Only in this way can you ensure that all diagnostic routines have been performed by the DME control module
In the case of Tiptronic vehicles, the Tiptronic fault memory must also be read out, because activation of the Check Engine MIL can also be initiated by the Tiptronic.


Fault Texts

Fault types
Type 1 Signal implausible/implausible operating range/malfunction
Type 2 Open circuit/no signal
Type 3 Short to ground/below lower limit/lean mixture threshold
Type 4 Short to B+/above upper limit/rich mixture threshold

Check Engine MIL
0 MIL is not triggered with this fault
1 MIL is on, emission relevant fault
2 MIL is flashing, fault damaging to TWC
3 Fault caused by short test
- Not installed (RoW)