Porsche DME 7.8 — OBD II Diagnosis Manual / PAGE 711
DME 7.8 DME 7.8 0 · Do not use contact spray on the connectors to oxygen
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DME 7.8 DME 7.8 0
Note!
Do not use contact spray on the connectors to oxygen sensor.
Work instruction Display OK If not OK
1 Check oxygen sensor ♦Remove oxygen sensor connec- 3.0 to 3.5 Ω at 20 Replace oxygen
heating tor Bank 2 ahead of catalytic °C sensor
converter
♦Check resistance between pin 3
and 4 towards the oxygen sen-
sor
♦Check resistance between pin 4 ∞ Ω
and the oxygen sensor housing
♦Check resistance between pin 1
and pin 4
♦Check resistance between pin 2
and pin 4
♦Check resistance between pin 5
and pin 4
♦Check resistance between pin 6
and pin 4
2 Check wiring ♦Switch on the ignition 0 V Repair wiring har-
ness ♦Measure voltage between pin 4
and vehicle ground towards
DME control module
Note!
Do not exchange oxygen sensors ahead of catalytic converter and
after catalytic converter.
2469 P1119 0-109 page 7
Printed in Germany – 2, 2000 p1119
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