Porsche DME 7.8 — OBD II Diagnosis Manual / PAGE 563
DME 7.8 DME 7.8 0 · 0-74P0453
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DME 7.8 DME 7.8 0
0-74P0453
99 Tank pressure sensor - above limit
Diagnosis conditions
• Ignition on
Possible fault cause
♦Short circuit to B+
Affected terminals
Terminal IV/21
Diagnosis/troubleshooting
Work instruction Display OK If not OK
1 Check wiring from pres- ♦Connect special tool 9637 to 0 V Repair wiring har-
sure sensor to DME con- wiring harness (DME control → End ness
trol module for short to module plug) → End
B+ ♦Remove connector of pressure
sensor
♦Measure voltage between spe-
cial tool Pin IV/21 and ground
2004 P0453 0-74 page 1
Printed in Germany, 2000 p0453
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