Reading and Clearing Diagnostic Trouble Codes

Fault code setting conditions
Fault codes can be set in several circumstances,
e.g.:
- Power failure
- Plug connections disconnected

In these circumstances, no fault is present in the system and the fault memory must be erased.

Fault memory Info key F8
In order to be able to assess the fault exactly, the fault memory Info key F8 must be pressed. This information should be saved using the Save key F4 and printed out. If a fault code is stored with "not present" status and no other problems are present, then the fault memory must be erased.

1. Open circuit/short to ground/short to B+:

Open circuit / short to ground:
There is (present) or was (not present) a short circuit to ground or an open circuit in the circuit to the control module terminal.

Short to B+:
There is (present) or was (not present) a short circuit to voltage.

2. Version / vehicle parameters
Incorrect vehicle coding or coding not carried out.

3. Counter
When a fault first occurs, a fault entry is made in the fault memory and the memory is simultaneously set to 50. If a fault is present, the counter is incremented by 1 each time the ignition is switched on. The maximum count is 100. The counter is decremented if the fault is no longer present. The fault memory is erased automatically when the counter reaches 0.