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Home >> Porsche >> 2003 >> 911 Turbo, Automatic >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Lights, Lamps, Switches Interior, Theft Protection Diagnosis - 911 Turbo (996) >> Fault code 40 >> Diagnosis/troubleshooting

Fault code 40: Diagnosis/troubleshooting

DIAGNOSIS/TROUBLESHOOTING (FAULT CODE 40)

Work instruction Display OK If not OK
1 Check the transponder coil
  • Pull plug off the signal converter
  • Measure resistance on plug of the signal converter between pin 1 and pin 2
20 -- 25 at 20 °C
Step 2
--> Step 5
2 Check wiring from transponder coil to signal converter for short circuit to ground
  • Pull plug off transponder coil
  • Measure resistance between plug on transponder coil pin 1 and ground
  • Measure resistance between plug on transponder coil pin 2 and ground
Step 3 Repair wiring harness
-> End
3 Check wiring from transponder coil to signal converter for short circuit to B+
  • Measure voltage between plug on transponder coil pin 1 and ground
  • Measure voltage between plug on transponder coil pin 2 and ground
0 V
Step 4
Repair wiring harness
-> End
4 Check wiring from transponder coil to signal converter for open circuit
  • Measure resistance between plug on transponder coil pin 1 and plug on signal converter pin 1
  • Measure resistance between plug on transponder coil pin 2 and plug on signal converter pin 2
Step 6 Repair wiring harness
-> End
5
  • Replace transponder coil
-> End
6
  • Replace signal converter
-> End