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Introduction PCM2/CDR23

PCM2/CDR23 (Porsche Communication Management / CD-Radio 23)

Introduction PCM2/CDR23

The manual contains the diagnosis for the following system:

PCM2/CDR23 with control units (depending on equipment)

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. 9-1; 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 (valid only for software version number < 03).
- 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 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 module 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.
- 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.

Fault type - Frequency counter/Temperature/Voltage; Speed/Time of occurrence.
Fault type The following display types are available:
- EEPROM fault
- Tuner communication fault
- General communication fault
Key code: The button which has caused the fault is displayed in plain text.
Frequency counter: When a fault first occurs, a fault entry is made in the fault memory and the counter is simultaneously set to 50. If a fault is present, the counter is incremented by 1 for each "ignition on". The maximum count is 100. The counter is decremented if the fault is no longer present. The fault memory is erased automatically when the counter reaches 0.
First occurrence (month, day): The date (month and day) on which the fault was first detected is displayed.
Temperature - first occurrence: The value indicates the temperature (temperature sensor in the gateway) at the time the fault was last detected.The temperature of the fibre optic transmitter (FOT) is monitored: max 85 °C.
Speed - first occurrence The value indicates the vehicle speed at the time the fault occurred.
Supply voltage - first occurrence The value indicates the voltage at the time the fault occurred.
Hourmeter - first occurrence The value indicates the operating hours at the time the fault first occurred.
Last occurrence (month, day): The date (month and day) on which the fault was last detected is displayed.
Temperature - last occurrence: The value indicates the (temperature sensor in the gateway) at the time the fault was last detected.
The temperature of the fibre optic transmitter (FOT) is monitored: max 85 °C.
Supply voltage - last occurrence The value indicates the voltage at the time the fault last occurred.
Hourmeter - last occurrence The value indicates the operating hours at the time the fault was last detected.


Display '*' in the menu 'Control modules' and menu 'PCM2/ CDR23 MOST component check'.
Different required and actual installed components lists

When the 'automatic control module search' is complete, the following display '*' appears in front of the control module description 'PCM2' 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 9588 Porsche System Tester II 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' in front of the line 'MOST required installed components list'.

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 9588 Porsche System Tester II.
1. 9588 Connect and start the 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 Control modules menu and confirm with the [>>] key.
4. Select 'Cayenne hand over' ' in the Control modules menu and confirm with the ' [>>] key.
5. Follow the instructions of the 9588 Porsche System Tester II.

Coding country-specific tuner settings
1. 9588 Connect and start the Porsche System Tester II and switch on the ignition.
2. Select 'Cayenne' in the Vehicle type menu and confirm with the [>>] key.
3. Select 'PCM2' in the Control modules menu and confirm with the [>>] key.
4. Select 'PCM2 GW' in the Cayenne PCM2 function selection and confirm with the [>>] key
5. Select 'Coding' in the Cayenne PCM2 GW function selection and confirm with the [>>] key
6. Select 'Tuner parameters' in the Cayenne PCM2 coding function selection and confirm with the [>>] key
7. Take the country-specific code as it appears in the table, enter it in the form and Code with the [F8] key.

Country-specific tuner settings
The following country-specific tuner settings can be 'coded':
- Europe
- USA
- South America
- Australia
- Asia
- (South) Africa
- Japan

MOST switch
The MOST switch is part of the PCM2. It keeps the electrical MOST closed if no other MOST control module is optically connected to the MOST. The MOST switch is opened when a light signal is received from the connected MOST control modules.

The following settings can be coded:
- MOST switch open.
- MOST switch closed.

NOTE:
- When the PCM2 is replaced, the coding must be performed in accordance with the vehicle equipment.
- When the 'Switch closed' parameter is set, the switch remains closed even in existing MOST control modules. Communication is then not possible.

Coding PCM2
1. 9588 Connect and start the Porsche System Tester II and switch on the ignition.
2. Select 'Cayenne' in the Vehicle type menu and confirm with the [>>] key.
3. Select 'PCM2' in the Control modules menu and confirm with the [>>] key.
4. Select 'PCM2 MMI' in the Cayenne PCM2 function selection and confirm with the [>>] key
5. Select 'Coding' in the PCM2 MMI function selection and confirm with the [>>] key.
6. Select 'PCM2 code' in the Cayenne PCM2 MMI coding function selection and confirm with the [>>] key
7. Take the PCM2 code from 'IPAS', enter it in the form and Code with the [F8] key.

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.
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