996 Carrera Group 0 Part 2 Diagnosis / PAGE 345
PCM diagnosis 911 Carrera (996) · Fault, fault code Possible causes, elimination, notes
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PCM diagnosis 911 Carrera (996)
Fault, fault code Possible causes, elimination, notes
Test point 9
Data lead, instrument Open circuit/short to B+
cluster-PCM 1. Pull off plug I on the display and operator control unit.
Open circuiVshort to B+
Short to ground 2. Pull off plug III on the instrumentcluster
Signal disturbance
Fault code 28 3. Check lead from plug I pin 21 to plug III pin 1
for continuityand short to B+.
Short to ground
1. Pull off plug I on the display and operator control unit.
2. Pull off plug III on the instrumentcluster.
3. Check lead from plug I pin 21 to plug III pin 11 for short to ground.
Signal disturbance
Check lead from plug I pin 21 to plug III pin 11
for short with other leads.
Test point 10
Vehicle data record 1. Select menu item Modify coding,
Programmingerror 2. SelectVehicle model
Fault code 29
3. Modify coding from LHOvehicle (RHOvehicle)
to RHOvehicle (LHOvehicle),
4. Modifycoding from RHOvehicle (LHO vehicle)
to LHOvehicle (RHOvehicle).
If the fault appears again, replace the display and operator control unit.
91 -D26 9101 Diagnosis/troubleshooting, PCM
This is a source reference. Confirm exact model applicability in the original material.