Porsche DME 7.8 — OBD II Diagnosis Manual / PAGE 167
DME 7.8 DME 7.8 0 · 0-8.8P0023
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DME 7.8 DME 7.8 0
0-8.8P0023
Camshaft Adjustment, Bank 2 Output Stage - Open
Circuit
Diagnosis conditions
• Engine running
Possible fault cause
♦Open circuit in triggering wire
♦Open circuit in B+ supply
♦Solenoid hydraulic valve faulty
Affected terminals
V/8
Diagnosis/Troubleshooting
Note!
The wiring for the solenoid hydraulic valve is routed via the connector X 59/1 pin 15
Work instruction Display OK If not OK
1 Check triggering wire for ♦Connect special tool 9637 to 0 - 5 Ω
continuity. wiring harness (DME control
module plug).
♦Remove connector on the sole-
noid hydraulic valve
♦Measure resistance between V/
8 and solenoid hydraulic valve
connector pin 2.
2 Check B+ supply for sole- ♦Remove connector on the sole- Battery voltage.
noid hydraulic valve noid hydraulic valve
♦Switch on the ignition.
♦Measure voltage of solenoid
hydraulic valve connector pin 1
and ground
3 Check resistance of sole- ♦Measure resistance of solenoid 8 - 12 Ω at 20° C.
noid hydraulic valve hydraulic valve between pin 1
and 2
1536 P0023 0-8.8 page 1
Printed in Germany – 6, 2002 p0023
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