91 PCM 2 / CDR 23 911 Turbo (996) · Diagnosis/troubleshooting

91 PCM 2 / CDR 23 911 Turbo (996) Diagnosis/troubleshooting Work instruction Display OK If not OK 1 Checking wiring har- ♦Connect the Porsche System → End Fault code is still ness and front left loud- Tester II No. 9588 to the diag- displayed. speaker and left door nostic socket; switch on the Step 2 box ignition and the Porsche Sys- tem Tester ll No. 9588. ♦Select vehicle type 911 (996) and start the automatic control module search. ♦Select 'PCM2' in the "Control modules" menu. ♦Select 'External amplifier' in the PCM2 menu. ♦Select 'Fault memory' in the menu and click the > > key. ♦Read out fault memory. ♦Erase fault memory. ♦Remove ignition key and switch on ignition again. ♦Read out fault memory. ♦Extract ambient data, press the >> key. 2 Checking wiring har- ♦Switch off ignition. = 5 Ω Step 4 ness and front left loud- ♦Pull plug A off the amplifier. Step 3 speaker and left door ♦Check resistance on plug A pin box 27 and pin 32. 3 Checking wiring har- ♦Switch off ignition. = 4 Ω Step 4 ness and front left loud- ♦Pull plug A off the amplifier. Step 10 speaker and left door ♦Measure resistance on plug A box pin 25 and pin 38. 4 Checking wiring har- ♦Pull plugs off loudspeakers. < 5 Ω Open circuit in wir- ness to front left door ♦Check resistance of plug A of Step 5 ing/short circuit to speaker and left door ground. Repair wir- amplifier pin 32 to plug on box ing harness. front right door speaker pin 2. → End 5 Checking wiring har- ♦Check resistance of wiring < 5 Ω Open circuit in wir- ness to front left door from plug A of amplifier pin 27 Step 8 ing/short circuit to speaker and left door to plug on front right door ground. Repair wir- box speaker pin 1. ing harness. → End 6 Checking wiring har- ♦Check resistance of wiring < 5 Ω Open circuit in wir- ness to front left door from plug A of amplifier pin 25 Step 7 ing/short circuit to speaker and left door to plug on front left door ground. Repair wir- box speaker pin 2. ing harness. → End 91-94 page 2 9101 8004 Harman external amplifier 8004VSlwl Printed in Germany – 29, 2002