Porsche DME 7.8 — OBD II Diagnosis Manual / PAGE 603
DME 7.8 DME 7.8 0 · Diagnosis/Troubleshooting
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DME 7.8 DME 7.8 0
Diagnosis/Troubleshooting
Work instruction Display OK If not OK
1 Check signal wire for con- ♦Remove connector I of alarm 0 - 5 Ω Step 2.
tinuity system control module Step 3.
♦Connect special tool 9637 to
wiring harness (DME control
module plug).
♦Measure resistance between
special tool 9637 Pin I/3 and
alarm system control module
plug Pin I/23
2 Remove connector X 2/3 ♦Measure resistance between 0 - 5 Ω Repair wiring har-
plug connection X 2/3 bushing Step 3. ness
6 and special tool 9637 Pin I/3 → End.
♦Measure resistance between
plug connection X 2/3 Pin 6 and
alarm system control module
plug I Pin 23
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.
9068 P0513 0-81.1 page 3
Printed in Germany – 6, 2002 p0513
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