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From the 7.8 DME Manual:
P1671
DME relay/control module faulty (computer monitoring: reset) – signal implausible
Possible fault cause
◆ Undervoltage
◆ DME relay faulty
◆ DME control module faulty
This fault may be entered if the control module has been operated with undervoltage.
Affected terminals
I/1 and I/8
Diagnosis/troubleshooting
Note!
• If no fault is present, erase the fault memory.
1) Check voltage supply, terminal 15
◆ Measure voltage between pin I/1 and ground.
> 11 V
2) Check DME relay ◆ Switch on the ignition
◆ Measure voltage between pin I/18 and ground
Battery positive voltage
Check triggering of DME relay
Replace DME relay
3) Replace DME control module.
4) Perform adaptation. ◆ Switch on the ignition
◆ Wait one minute
◆ Do not press the accelerator
◆ Switch off the ignition for at least 10 seconds
◆ Read out the fault memory
-> End -> End
__________________
1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster original owner. I installed used motor at 89k.
1987 924S. 2002 996TT. PST-2
Owned and repaired Porsches since 1974. Porsche: It's not driving, it's therapy.
Last edited by Paul; 07-06-2014 at 02:08 PM.
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