Porsche DME 7.8 — OBD II Diagnosis Manual / PAGE 1057
DME 7.8 DME 7.8 0 · 0-187P1548
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DME 7.8 DME 7.8 0
0-187P1548
171 Charge Pressure Control Valve Output Stage -
Open Circuit
Diagnosis conditions
• Ignition on
Possible fault cause
♦Charge pressure control valve (coil) open circuit
♦Open circuit in wiring
Affected terminals
III/4
Diagnosis/Troubleshooting
Work instruction Display OK If not OK
1 Check charge pressure ♦Measure resistance at the 20 - 26 Ω at 20 °C.
control valve. charge pressure control valve.
2 Check wiring harness for ♦Connect special tool 9637 to 0 - 5 Ω Repair wiring har-
open circuit. wiring harness (DME control ness
module plug). → End.
♦Remove connector of charge
pressure control valve.
♦Measure resistance between
special tool 9637 pin III/4 and
charge pressure control valve
plug pin 2.
2193 P1548 0-187 page 1
Printed in Germany – 3, 2001 p1548
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