8009 Pcm2 - MMI: Diagnosis/troubleshooting

DIAGNOSIS/TROUBLESHOOTING - 8009 PCM2 - MMI

Work instruction			Display OK	If not OK
1	MOST component check runs automatically	Connect the Porsche System Tester II 9588 to the diagnostic socket, start it and switch on the ignition Select Boxster (986) in the Vehicle type menu and confirm with the ">>" key Select PCM in the Control units menu and confirm with the ">>" key Select MOST components check in the PCM2 function selection and confirm with the ">>" key Follow the instructions of the tester	The following text is displayed: Test successfully completed. No faults found. -> End	Tester displays an optical fault: Under Faulty device, the tester displays the relevant MOST control module from which a corresponding signal is not recognised Step 2 Tester displays an electrical fault Step 7
2	Open circuit in MOST, optical	Replace the optical waveguide for the MOST control module with the optical wavelength test line 9712 Clear fault memory 8009 Select MOST components check and start it again with the ">>" key Follow the Tester instructions	The following text is displayed: Test successfully completed. No faults found Step 3	Step 4
3	Replace the optical waveguide		-> End
4	Open circuit in MOST, optical	If an MMI or GW fault is displayed under step 1: Connect optical output with the optical input of the MOST control module which is installed before the PCM2/CDR23 with the optical waveguide test line 9712
-	If only 1 external MOST control module is present and fault memory entry under step 1 is not MMI or GW:	If only 1 external MOST control module is present and fault memory entry under step 1 is not MMI or GW: fault memory entry 8009 = MMI or GW Step 6	If only 1 external MOST control module is present and fault memory entry under step 1 is not MMI or GW: fault memory entry 8009 is not MMI or GW Step 5	-
-	-	Otherwise Connect the optical waveguide test line 9712 with the following Most control module displayed under step 1 (do not change the input of the optical waveguide test line)	Otherwise: The following text is displayed: Test successfully completed. No faults found. Step 6	Otherwise: Step 7
-	-	After installation Optical waveguide test line 9712 : Clear fault memory 8009 Select MOST components check and start it again with the ">>" key Follow the Tester instructions	-> End
5	Replace the control module displayed under step 1.		-> End
6	Replace the control module before the one displayed under step 1.		-> End
7	Check the power supply of the displayed control module.		Step 6	Repair -> End
8	Check wiring of the ring break diagnosis line.		Step 6	Repair -> End
9	Replace displayed control module		-> End