96-44Fault code 39 · Signal converter faulty

911 Turbo (996) Alarm system I 48 96 96-44Fault code 39 Signal converter faulty Diagnostic conditions • Terminal 86 S or terminal 15 on Possible cause of fault ♦Short circuit to voltage/ground or open circuit in the wiring between the alarm system control module and the signal con- verter Affected terminals Plug A, terminals 3 and 4 Diagnosis/troubleshooting Work instruction Display OK If not OK 1 Check power supply of ♦Switch off ignition > 11 V Repair wiring har- the signal converter ⇒ Step 2 ness ♦Pull plug off the signal converter ♦Switch on terminal 86 S ♦Measure voltage between plug on the signal converter pin 5 and ground ♦Measure voltage between the plug on the signal converter pin 5 and pin 4 2 Check wiring from signal ♦Switch off ignition ∞ Ω Repair wiring har- converter to alarm sys- ⇒ Step 3 ness ♦Pull plug A off the alarm system tem control module for → End control module short circuit to ground ♦Measure resistance between plug on alarm system pin 3 and ground ♦Measure resistance between plug on alarm system pin 4 and ground 3 Check wiring from signal ♦Switch on ignition 0 V Repair wiring har- converter to alarm sys- ⇒ Step 4 ness ♦Measure voltage between plug A tem control module for → End on control module pin 3 and short circuit to B+ ground ♦Measure voltage between plug A on control module pin 4 and ground 9601 Fault code 39 96-44 page 1 Printed in Germany – 2, 2001 39xxxi48