Porsche DME 7.8 — OBD II Diagnosis Manual / PAGE 196
DME 7.8 DME 7.8 0 · Work instruction
Read extracted page text
OCR can contain errors. Check the original page image for exact wording, warnings and specifications.
DME 7.8 DME 7.8 0
Work instruction Display OK If not OK
3 Check oxygen sensor wir- ♦Disconnect oxygen sensor plug < 2 Ω Using the findings
ing harness ahead of cat- connection ahead of catalytic ⇒ Step 4 from Step 2, repair
alytic converter, bank 2 converter, bank 2 or replace wiring
harness ♦Visual inspection
→ End
Check following wiring for continuity
♦Oxygen sensor connector ahead
of catalytic converter pin 1 and
DME control module connector
B pin 16
♦Oxygen sensor connector ahead
of catalytic converter pin 5 and
DME control module connector
B pin 10
♦Oxygen sensor connector ahead
of catalytic converter pin 2 and
DME control module connector
B pin 6
♦Oxygen sensor connector ahead
of catalytic converter pin 6 and
DME control module connector
B pin 24
4 Check engine After reading out the oxygen sensor Repair according to findings
values, search for a leaking fuel
injector on the bank with the lean
threshold and search for false air on
the bank with the rich threshold.
2470 P0040 0-P0040 page 3
Printed in Germany – 13, 2003 p0040
This is a source reference. Confirm exact model applicability in the original material.