996 Carrera Group 0 Part 2 Diagnosis / PAGE 343
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
Signal disturbance
Check lead from plug" pin 14 to plug I pin 17
for short with other leads.
Test point 5
Speedometer A, Open circuit/short to ground/short to B+
navigation unit 1. Pull off plug on the navigationunit.
Open circuiVshort to
ground/short to B+ 2. Pull off plug I on the instrumentcluster.
Fault code 24
3. Check lead from navigation unit plug pin 3 to plug I pin 13
for continuity and short to ground or short to B+.
Note
The lead is routed via jumper plug 1 on relay carrier 1
Test point 6
Signal, reverse Signal implausible
gear-navigationunit 1. Check reversing light switch or, on Tiptronic vehicles, position switch.
Signal implausible
Fault code 25 2. Check lead from navigation unit plug pin 4 to the reversing light
switch or position switch for short circuit to B+.
Note
The lead is routed via plug connection X 2/4 and via the jumper plug
20/1 on relay carrier 2.
91 -D24 9101 Diagnosis/troubleshooting, PCM
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