Porsche DME 7.8 — OBD II Diagnosis Manual / PAGE 774
DME 7.8 DME 7.80 · Figure 1:
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DME 7.8 DME 7.80
Figure 1:
Figure 2:
Work instruction Display OK If not OK
2 Check TP sensor voltage ♦Connect special tool 9637 to Approx. 5 V Step 4.
supply wiring harness (DME control Step 3
module plug).
♦Switch on the ignition.
♦Measure voltage between Pin III/
10 and Pin III/25
3 Check voltage values of ♦Connect special tool 9637. Replace throttle part
throttle position sensor 2 ♦Switch on the ignition. Step 6.
♦Measure voltage between Pin III/ Approx. 4.0 -4.4 V
8 and Pin III/25
♦Fully depress accelerator pedal
♦Measure voltage between Pin III/ Approx. 0.5 -0.8 V
8 and Pin III/25
4 Check wiring from throttle ♦Separate disconnection point to Repair wiring har-
part to DME control mod- throttle part. ness
ule for continuity or short → End. ♦Connect special tool 9637 to
circuit to B+ wiring harness (DME control
module plug).
0-122.3 page 2 2442 P1140
p1140 Printed in Germany – 6, 2002
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