Porsche DME 7.8 — OBD II Diagnosis Manual / PAGE 706
DME 7.8 DME 7.80 · Work instruction Display OK
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DME 7.8 DME 7.80
Work instruction Display OK If not OK
3 Check B+ supply for oxy- ♦Start the engine Battery positive volt-
gen sensor heating age ♦Measure voltage between pin 3
towards the DME control module
and ground
4 Check wiring ♦Check resistance between pin 4 0 - 5 Ω
and pin II/19
5 Check oxygen sensor ♦Check resistance between pin 4 ∞ Ω Replace oxygen
and the oxygen sensor housing sensor
♦Check resistance between pin 1
and the oxygen sensor housing
♦Check resistance between pin 2
and the oxygen sensor housing
♦Check resistance between pin 5
and the oxygen sensor housing
♦Check resistance between pin 6
and the oxygen sensor housing
Note!
Do not exchange oxygen sensors ahead of catalytic converter and
after catalytic converter.
0-109 page 2 2469 P1119
p1119 Printed in Germany – 2, 2000
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