Supply Voltage Fault Entry; Test Drive After Connecting The Battery; Dme Control Module - Porsche 996 TT Repair Manual

discharged.
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Supply voltage fault entry

Problem
The entry "supply voltage" could be stored in various control
modules if the battery has been completely discharged.
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Test drive after connecting the battery

Note
• The fault memories of all vehicle control modules should be read out again after the test drive!
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2470 DME control module

Note
• With all DME systems, the engine must run for several minutes before the engine control module can
relearn the idle speed and mixture adaptation values!
Problem
• After disconnection of the power supply, the idle speed
might change or fluctuate briefly until the throttle
adjusting unit (ME 7.8) is readapted.
• The mixture adaptation is also lost.
Control module memories
einordnung
out before the battery is disconnected.
Remedy
Remedy
After the battery is connected.
With the DME ME 7.8, it is
necessary to carry out a learning and
adaptation routine as described
below:
1. Switch the ignition on for 1
minute without starting the
engine. Do not actuate
accelerator pedal.
2. Switch off ignition for at least
10 seconds.
Delete the "supply voltage"
entry from the control modules
in question.
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