| 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 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 PCM2 MMI in the Boxster (986) PCM2 function selection and confirm with the ">>" key
- Select Fault memory in the PCM2 MMI function selection and confirm with 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
|
The fault is remedied
-> End |
Fault code is still displayed
Step 2 |
| 2 |
Check MOST components |
- 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 component check in the Boxster (986) PCM2 function selection menu and confirm with the ">>" key
- Wait for the end of the automatic check
- The duration of the check depends on the number of existing MOST control modules
The result of the test indicates if a fault was diagnosed in the system, and if so, where it is located. |
- Gateway > amplifier optically OK electrically OK
- Amplifier > CD changer optically OK electrically OK
- CD changer > telephone/optically OK electrically OK
- Telephone > MMI optically OK electrically OK
- MMI > navigation electrically OK
- Navigation > VOCS electrically OK
- VOCS > navigation electrically OK
|
An optical fault is displayed 3
An electrical fault is displayed 4 |
| 3 |
Optical fault |
Replace the relevant optical waveguide between the listed faulty components with the optical waveguide test line 9712 that is provided as a special tool. Check MOST components again |
Replace the faulty optical waveguide with the relevant spare part
-> End |
Replace the relevant recipient MOST control module
Step 2 |
| 4 |
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 modules
- Measure the resistance of the diagnosis distribution line between the relevant plug connections
|
< 0.5
Step 5 |
Remove open circuit in diagnosis distribution line
-> End |
| 5 |
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 modules
- Measure the resistance of the diagnosis distribution line to ground
|
Step 6 |
Remove short circuit to ground in diagnosis distribution line
-> End |
| 6 |
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 modules
- Measure the voltage of the diagnosis distribution line to ground
- Switch ignition on
|
0 V
Step 7 |
Remove short circuit to B+ in diagnosis distribution line
-> End |
| 7 |
Replace PCM2 |
-> End |
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