Porsche DME 7.8 — OBD II Diagnosis Manual / PAGE 221
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 signal from MAF ♦Check voltage signal from MAF 0.9 to 1.1 V Replace MAF sensor
sensor sensor with ’Ignition on’ (with ⇒ Step 4
Porsche System Tester 2 in the
’Actual values/mass air flow’
menu, or with a voltmeter and
special tool 9637).
♦Start the engine 1.2 to 1.5 V
(at idle speed)
→ End
4 Clean air cleaner and ♦Clean pure air side of air cleaner → End
replace filter element (extract dirt, do not blow out
with compressed air with mass
air flow sensor installed)
♦Replace filter element
0-9 page 2 2445 P0102
p0102 Printed in Germany, 2000
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