96-47Fault code 42 · Wrong key or wrong transponder pill

911 Turbo (996) Alarm system I 48 96 96-47Fault code 42 Wrong key or wrong transponder pill Diagnostic conditions • Ignition on Possible cause of fault ♦Wrong transponder – not adapted to the vehicle. ♦Short circuit to ground/voltage or open circuit in the wiring between the signal converter and alarm system control module Affected terminals Plug A, terminals 3 and 4 Diagnosis/troubleshooting Work instruction Display OK If not OK 1 Check transponder ♦Check whether the transponder ⇒ Step 2 Replace hand-held is present in the hand-held trans- transmitter mitter and undamaged → End 2 Check teaching functions ♦Connect PST 2, switch on igni- ⇒ Step 3 Re-teach the trans- tion and select the alarm system ponder in menu item control module "Transponder key" ♦In menu item "Learning func- tions" check whether the trans- ponder has been adapted to the vehicle 3 Check control lead ♦Switch off ignition ∞ Ω Repair wiring har- between the alarm sys- ⇒ Step 4 ness ♦Pull plug A off the alarm system tem control module and → End control module the signal converter for ♦Pull plug off the signal converter short circuit to ground ♦Measure resistance between plug A on control module pin 4 and ground 4 Check control lead ♦Switch on ignition 0 V Repair wiring har- between the alarm sys- ⇒ Step 5 ness ♦Measure voltage between plug A tem control module and → End on alarm system control module the signal converter for pin 4 and ground short circuit to B+ 9601 Fault code 42 96-47 page 1 Printed in Germany – 4, 2001 42xxxi48