Porsche DME 7.8 — OBD II Diagnosis Manual / PAGE 548
DME 7.8 DME 7.80 · 98 EVAP canister purge valve - short to ground
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DME 7.8 DME 7.80
98 EVAP canister purge valve - short to ground
Diagnosis conditions
• Engine running
• Battery voltage greater than 7 V
Possible fault cause
♦Wiring harness
♦DME control module faulty
Affected terminals
Terminal III/3
Diagnosis/troubleshooting
Work instruction Display OK If not OK
1 Check triggering wire for ♦Remove connector of EVAP can- ∞ Ω Repair wiring har-
EVAP canister purge valve ister purge valve ⇒ Step 2 ness
for short circuit to ground → End ♦Connect special tool 9637 to
wiring harness (DME control
module plug)
♦Measure resistance between
special tool 9637 Pin III/3 and
ground
2 Replace DME control module ⇒ Step 3
3 Perform adaptation ♦Switch on the ignition → End
♦Wait one minute
♦Do not press the accelerator
♦Switch off the ignition for at
least 10 seconds
♦Read out the fault memory
0-68 page 2 2023 P0445
p0445 Printed in Germany, 2000
This is a source reference. Confirm exact model applicability in the original material.