Porsche DME 7.8 — OBD II Diagnosis Manual / PAGE 602
DME 7.8 DME 7.80 · Work instruction Display OK
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DME 7.8 DME 7.80
Work instruction Display OK If not OK
3 Check signal wire for ♦Remove connector I of alarm ∞ Ω Repair wiring har-
short circuit to ground system control module Step 4. ness
→ End. ♦Connect special tool 9637 to
wiring harness (DME control
module plug).
♦Measure resistance between
special tool 9637 Pin I/3 and
ground
4 Check signal wire for ♦Remove connector I of alarm 0 V Repair wiring har-
short circuit to B+ system control module Step 4. ness
→ End. ♦Connect special tool 9637 to
wiring harness (DME control
module plug).
♦Measure voltage between spe-
cial tool 9637 Pin I/3 and
ground
5 Replace alarm system control module. → End. → End.
Immobilizer - Open Circuit
Diagnosis conditions
• Start condition
• Motronic reset
Possible fault cause
♦Open circuit in wiring between DME control module and alarm
system
♦Short circuit to ground or short circuit to B+
♦Alarm system control module faulty
Affected terminals
-
0-81.1 page 2 9068 P0513
p0513 Printed in Germany – 6, 2002
This is a source reference. Confirm exact model applicability in the original material.