PCM2/CDR23 (CD Changer)

PCM2/CDR23
(CD changer)

Introduction - CD changer
The manual contains the diagnosis for the following system:
PCM2

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 must be observed.
- Deactivate the "automatic traffic announcement" before beginning the diagnosis on the PCM2. If this is not done, the system will crash (applies only to software version < 03).
- When working on the optical waveguide, please observe the instructions in assembly Optical waveguide - MOST bus.
- After troubleshooting or repairs, erase the fault memory with the 9588 Porsche System Tester II and carry out a test drive.
- After the test drive, read out the fault memory with the 9588 Porsche System Tester II again.

DANGER:
Danger of injury through triggering of driver's airbag.
- 9588 Never hang the Porsche System Tester II 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 unless battery is connected securely.
- 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.:
- battery disconnected
- plug connections disconnected
- 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.

Open circuit - short to ground / voltage short / version; vehicle parameters / counter
Frequency counter ?
CD number Position of CD in the magazine for which a malfunction was detected.

Vehicle hand-over
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 9588 Porsche System Tester II.

1. Connect and start the 9588 Porsche System Tester II 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 function selection Special functions and confirm with the [>>] key.
4. Follow the instructions of the 9588 Porsche System Tester II.

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 stored PCM2 code is compared with that 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.

Coding PCM2

1. Connect and start the 9588 Porsche System Tester II and switch on the ignition.
2. Select 'Boxster (986)' in the Vehicle type menu and confirm with the [>>] key.
3. Select 'PCM' in the control modules selection and confirm with the [>>] key.
4. Select 'CD changer' in the PCM2 function selection and confirm with the [>>] key.
5. Select 'Coding' in the CD changer function selection and confirm with the [>>] key.
6. Select 'PCM2 code' in the CD changer coding and confirm with the [>>] key.
7. Take the PCM2 code from 'IPAS', enter it in the form and code with the [F8] key.