8007 Pcm2 - MMI: Diagnosis/troubleshooting

DIAGNOSIS/TROUBLESHOOTING (8007 PCM2 - MMI)

Work instruction			Display OK	If not OK
1	Read out PCM2 fault memory	Connect the Porsche System Tester II 9588 to the diagnostic socket, start it and switch on the ignition. Select 911 Turbo (996) in the Vehicle type menu and confirm with the ">>" key. Select PCM in the control units selection and confirm with the ">>" key. Select PCM2 MMI in the PCM2 function selection and confirm with the ">>" key Click the ">>" key in the Fault memory menu 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	The fault is remedied -> End	Fault code is still displayed Step 2
2	Check diagnosis distribution line for open circuit	Check diagnosis distribution line between the listed faulty components for an open circuit Switch ignition off. Disconnect the plug connections of the existing MOST control units Measure the resistance of the diagnosis distribution line between the relevant plug connections	< 0.5 STEP 3	Remove open circuit in diagnosis distribution line -> End
3	Check diagnosis distribution line for short circuit to ground	Check diagnosis distribution line between the listed faulty components for short circuit to ground Switch ignition off. Disconnect the plug connections of the existing MOST control units Measure the resistance of the diagnosis distribution line to ground	Step 4	Remove short circuit to ground in diagnosis distribution line -> End
4	Check diagnosis distribution line for short circuit to B+	Check diagnosis distribution line between the listed faulty components for short circuit to B+ Switch ignition off. Disconnect the plug connections of the existing MOST control units Measure the voltage of the diagnosis distribution line to ground Switch ignition on.	0 Volt STEP 5	Remove short circuit to B+ in diagnosis distribution line -> End
5	Replace PCM2		-> End