Porsche DME 7.8 — OBD II Diagnosis Manual / PAGE 547
DME 7.8 DME 7.8 0 · 0-68P0445
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DME 7.8 DME 7.8 0
0-68P0445
98 EVAP canister purge valve - short circuit to B+
Diagnosis conditions
• Engine running
• Battery voltage greater than 7 V
Possible fault cause
♦Wiring harness
♦DME control module faulty
Affected terminals
Terminal III/3 and IV/26
Diagnosis/troubleshooting
Work instruction Display OK If not OK
1 Check triggering wire for ♦Remove connector of EVAP can- 0 V Repair wiring har-
EVAP canister purge valve ister purge valve ⇒ Step 2 ness
for short circuit to B+ → End ♦Connect special tool 9637 to
wiring harness (DME control
module plug)
♦Measure voltage between spe-
cial tool 9637 Pin III/3 and
ground
♦Switch on the ignition
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
2023 P0445 0-68 page 1
Printed in Germany, 2000 p0445
This is a source reference. Confirm exact model applicability in the original material.