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Home >> Porsche >> 2003 >> 911 Carrera 4S, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Anti-Theft Systems >> Lights, Lamps, Switches Interior, Theft Protection Diagnosis - 911 CARRERA (996) >> Fault code 42 >> Diagnosis/troubleshooting

Fault code 42: Diagnosis/troubleshooting

DIAGNOSIS/TROUBLESHOOTING (FAULT CODE 42)

Work instruction Display OK If not OK
1 Check transponder.
  • Check whether the transponder is present and undamaged in the hand-held transmitter.
 Step 2 Replace hand-held transmitter.
->End
2 Check teaching functions.
  • Connect the Porsche System Tester II 9588, switch on the ignition and select the alarm system control module.
  • Check whether the transponder has been adapted to the vehicle in the Learning functions menu item.
 Step 3 Re-teach the transponder in the Transponder key menu item.
3 Check control lead between the alarm system control module and the signal converter for short circuit to ground.
  • Switch off ignition.
  • Pull plug A off the alarm system control module.
  • Pull plug off the signal converter.
  • Measure resistance between plug A on control module pin 4 and ground.
 Step 4 Repair wiring harness.
->End
4 Check control lead between the alarm system control module and the signal converter for short circuit to B+.
  • Switch on the ignition.
  • Measure voltage between plug A on alarm system control module pin 4 and ground.
 0 V
Step 5		 Repair wiring harness.
->End
5 Check control lead between the alarm system control module and the signal converter for open circuit.
  • Switch off ignition.
  • Measure resistance between plug A on alarm system control module pin 4 and plug on signal converter pin 6.
 < 5
Step 6		 Repair wiring harness.
->End
6 Check data lead between the alarm system control module and the signal converter for short circuit to ground.
  • Switch off ignition.
  • Pull plug A off the alarm system control module.
  • Pull plug off the signal converter.
  • Measure resistance between plug A on control module pin 3 and ground.
 Step 7 Repair wiring harness.
->End
7 Check data lead between the alarm system control module and the signal converter for short circuit to B+.
  • Switch on the ignition.
  • Measure voltage between plug A on alarm system control module pin 3 and ground.
 0 V
Step 8		 Repair wiring harness.
->End
8 Check data lead between the alarm system control module and the signal converter for open circuit.
  • Switch off ignition.
  • Measure resistance between plug A on alarm system control module pin 3 and plug on signal converter pin 8.
 < 5
Step 9		 Repair wiring harness.
->End
9
  • Replace signal converter.
 ->End
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