Porsche DME 7.8 — OBD II Diagnosis Manual / PAGE 1005
DME 7.8 DME 7.8 0 · Work instruction
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DME 7.8 DME 7.8 0
Work instruction Display OK If not OK
5 Check air change-over ♦Run engine briefly to produce Vacuum must be
valve vacuum. present
♦Activate secondary air pump.
♦Remove vacuum hose of air
change-over valve.
♦After activation, check pneu-
matic change-over valve for con-
tinuity
6 Check air supply lines for
blockage
2665 P1411 0-167 page 3
Printed in Germany – 1, 2000 p1411
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