Porsche DME 7.8 — OBD II Diagnosis Manual / PAGE 1111
DME 7.8 DME 7.8 0 · 0-201P1675
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DME 7.8 DME 7.8 0
0-201P1675
658 Engine Purge Fan Fault - Above Limit
Diagnosis conditions
• Ignition on
Possible fault cause
♦Fuses
♦Relays
♦Fans
Affected terminals
-
Diagnosis/Troubleshooting
Work instruction Display OK If not OK
1 Check fuses B4 and C5.
2 Check fans. ♦Remove engine compartment Fan must run. ♦Check ground
fan relay. supply wire for
fan. ♦Bridge terminals 30 and 87.
♦Check B+ supply
wire for continu-
ity.
3 Check relays.
1981 P1675 0-201 page 1
Printed in Germany – 3, 2001 p1675
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