Porsche DME 7.8 — OBD II Diagnosis Manual / PAGE 502
DME 7.8 DME 7.8 0 · 0-57.1P0346
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DME 7.8 DME 7.8 0
0-57.1P0346
Camshaft Position Sensor 2 - Signal Implausible
Diagnosis conditions
• Engine running
Possible fault cause
♦Loose contact
♦Camshaft position sensor
Note!
♦If both CMP sensor signals are missing, the start will take at
least 10 seconds.
♦For safety reasons, the ignition timing is retarded.
Affected terminals
Terminals III/7, III/17 and III/18
Diagnosis/Troubleshooting
Work instruction Display OK If not OK
1 Check CMP sensor volt- ♦Remove connector of CMP sen- Approx. 5 V Step 2.
age supply sor 2 Step 5
♦Switch on the ignition.
♦Measure voltage between Pin 1
and Pin 3
2 Check power supply wir- ♦Remove connector of CMP sen- 0 - 5 Ω
ing for continuity. sor 2 Step 3.
♦Connect special tool 9637 to
wiring harness (DME control
module plug).
♦Measure resistance between
special tool 9637 Pin III/7 and
CMP sensor 2 plug Pin 3
♦Measure resistance between
special tool 9637 Pin III/17 and
CMP sensor plug 2 Pin 1
3 Replace DME control module Step 4.
2839 P0346 0-57.1 page 1
Printed in Germany – 6, 2002 p0346
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