Introduction - External BOSE Amplifier
PCM2/CDR23 (External BOSE amplifier)Introduction - external BOSE amplifier
The manual contains the diagnosis for the following system:
External BOSE amplifier
General instructions/safety instructions
The following points must be observed during vehicle diagnosis:
- After the battery is connected, volatile memories must be reprogrammed. In the case of radio coding and tuning, the customer must be informed of decoding and the deleted tuner memory.
- After the battery has been connected, the instructions in the assembly --> 9; Rep. Gr. - ; Work instructions after disconnecting the battery must be observed.
- Deactivate the 'automatic traffic announcement' before beginning the diagnosis on the PCM2. If this is not done, the system will crash.
- When working on the optical waveguide, please observe the instructions in assembly --> 9; Rep. Gr.9768; Optical waveguide - MOST bus.
- After troubleshooting or repairs, erase the fault memory with the Porsche System Tester II No.9588 and carry out a test drive.
- After the test drive, read out the fault memory with the Porsche System Tester II No.9588 again.
DANGER:
Danger of injury through triggering of driver's airbag
- Never hang the Porsche System Tester II No.9588 over the steering wheel.
CAUTION:
Danger of damage due to improper handling of the battery and the control unit connectors.
- Never disconnect battery with engine running.
- Never start engine without securely connected battery.
- Never pull off or push on plug connections for the control modules or other electronic components when the ignition is switched on
General information on the fault memory
Fault code setting conditions
Fault codes can be set in several circumstances, e.g.:
- when disconnecting battery
- when disconnecting plug connections
- when there is a power failure
In these circumstances, no fault is present in the system and the fault memory must be erased.
Fault memory Info key [F8]
In order to be able to assess the fault exactly, the fault memory Info key [F8] must be pressed. This information should be saved using the Save key [F4] and printed out. If a fault code is stored with "not present" status and no other problems are present, then the fault memory must be erased.
Display '*' in the menu 'Control modules' and menu 'PCM2/CDR23 MOST component check'.
Differing required/actual installed components list
When the 'automatic control module search' is complete, the following display '*' appears in front of the control module description 'PCM2 or CDR23' in the 'Control modules' menu, as well as in the 'PCM2 MMI function selection' in front of the entry 'MOST required installed components list' if the Porsche System Tester II No.9588 establishes a difference between the required and actual installed components list and there is no fault code in one of the fault memories of the MOST control modules.
If there is a fault code present in one of the MOST control modules, the display '*' is only shown in the 'PCM2 MMI function selection'.
If there is a display in the menu Control module, an existing fault code has priority and a '#' is set.
Vehicle hand-over
The PCM2 is converted into production mode (low-current mode) in production. As known from other systems (alarm system, instrument cluster, roll-over bar), the PCM2 must be activated with the Porsche System Tester II No. 9588.
1. Connect and start the Porsche System Tester II No.9588 and switch on the ignition.
2. Select 'Special functions' in the Vehicle type menu and confirm with the [>>] key
3. Select 'Vehicle hand-over' in the Control modules menu and confirm with the [>>] key
4. Follow the instructions of the Porsche System Tester II No. 9588.
Replacing CDR23 control modules
The PCM2 is converted to delivery mode (low-current mode) in production. As known from other systems (alarm system, instrument cluster, roll-over bar), the PCM2 must be activated with the Porsche System Tester II No. 9588.
1. Connect and start the Porsche System Tester II No.9588 and switch on the ignition.
2. Select 'Special functions' in the Vehicle type menu and confirm with the [>>] key
3. Select 'Vehicle hand-over' in the Control modules menu and confirm with the [>>] key
4. Follow the instructions of the Porsche System Tester II No. 9588.
Control module replacement - PCM2
The PCM2 is provided in 'active production mode' in new vehicles and as a spare part. Each time the vehicle is started, the model range code that is stored is compared with the code in the instrument cluster. If no match is found, the device switches off after 30 seconds and the 'PROTECTED' message appears in the display. The device is not operational.
If a match is found, the device is operational. No further checks are made while the device is connected to the vehicle electrical system.