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CDR23 Control Module Function



CDR23 Control Module Function

Terminating Resistors On The CAN
A terminating resistor is fitted to each end of the wiring to prevent reflection on the wiring. These terminating resistors are integrated into two control modules.

CAN Comfort
Communication between the Porsche System Tester II No. 9588 and the MOST control modules only takes place via the K lead to the instrument cluster. The data is transferred from the instrument cluster gateway to the MOST control units via CAN comfort to the CDR23 gateway and via the optical MOST outside the CDR23.

CD Changer (CDC)
The CDC is available as an optional feature and is linked to the CDR23 via the optical waveguide.

Coding Table










Coding
Under the menu item 'Modify coding', the PCM2 codes can be coded on a vehicle and country-specific basis.

Menu item Function

- Vehicle type vehicle
coding The CDR23 can be coded in accordance with the vehicle type using this menu item.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select '911 (996)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the Control unit menu and confirm with the >> key.
- Select 'CDR23' in the 911 (996) PCM2 function selection and confirm with the >> key.
- Select 'Coding' in the 911 (996) CDR23 function selection and confirm with the >> key.
- Select 'Vehicle type vehicle coding' in the Coding menu and confirm with the >> key.
- Select '911 (996)' in the menu and code with the F8 key.
- Vehicle version vehicle
coding The CDR23 can be coded in accordance with the vehicle version using this menu item.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select '911 (996)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the Control unit menu and confirm with the >> key.
- Select 'CDR23' in the 911 (996) PCM2 function selection and confirm with the >> key.
- Select 'Coding' in the PCM2 GW function selection and confirm with the >> key.
- Select 'Vehicle version vehicle coding' in the Coding menu and confirm with the >> key.
- Select "911 (996)" in the menu and code with the F8 key.
- Right/left-hand drive
vehicle coding The CDR23 can be coded in accordance with the vehicle model using this menu item.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select '911 (996)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the Control units menu and confirm with the >> key.
- Select 'CDR23' in the 911 (996) PCM2 function selection and confirm with the >> key.
- Select 'Coding' in the 911 (996) CDR23 function selection and confirm with the >> key.
- Select "Right/left-hand drive vehicle coding" in the 911 (996) CDR23 coding function selection and confirm with the >> key
- Select "Right/left-hand drive" from the menu item that is displayed and code it with the F8 key

The following selection is available:
- Right-hand drive
- Left-hand drive

- Air conditioning
with/without You can code the relevant vehicle version with or without air conditioning using this menu item.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select '911 (996)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the Control units menu and confirm with the >> key.
- Select 'CDR23' in the 911 (996) PCM2 function selection and confirm with the >> key.
- Select 'Coding' in the 911 (996) CDR23 function selection and confirm with the >> key.
- Select "Air conditioning with/without" in the 911 (996) CDR23 coding function selection and confirm with the >> key.
- Select 'with or without' in the menu corresponding to the vehicle equipment and code with the F8 key.
- GAL (noise-dependent
loudspeaker
boost - NLB) You can code the NLB as required using this menu item.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select '911 (996)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the Control units menu and confirm with the >> key.
- Select 'CDR23' in the 911 (996) PCM2 function selection and confirm with the >> key.
- Select 'Coding' in the 911 (996) CDR23 function selection and confirm with the >> key.
- Select "GAL (NLB)" in the 911 (996) CDR23 coding function selection and confirm with the >> key.
- Select 'Value' corresponding to the desired volume and code with the F8 key.
- Country coding You can code the country code using this menu item.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select '911 (996)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the Control units menu and confirm with the >> key.
- Select 'CDR23' in the 911 (996) PCM2 function selection and confirm with the >> key.
- Select 'Coding' in the 911 (996) CDR23 function selection and confirm with the >> key.
- Select 'Country coding' in the CDR23 coding function selection and confirm with the >> key.
- Select "RoW or USA" and code with the F8 key.
- PCM2 code It is possible to code the PCM2 code under this menu item after replacing the CDR23.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select '911 (996)' in the Vehicle type menu and confirm with the >> key.
- Select 'CDR23' in the Control units menu and confirm with the >> key.
- Select 'Coding' in the 911 (996) CDR23 function selection and confirm with the >> key.
- Select 'CDR23 code' in the CDR23 coding function selection and confirm with the >> key.
- Take the PCM2 code from 'IPAS', enter it using the arrow keys and code it with the F8 key.
- Production mode You can code the production mode using this menu item.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select '911 (996)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the Control units menu and confirm with the >> key.
- Select 'CDR23' in the 911 (996) PCM2 function selection and confirm with the >> key.
- Select 'Coding' in the 911 (996) CDR23 function selection and confirm with the >> key.
- Select 'Production mode' in the 911 (996) CDR23 coding function selection and confirm with the >> key.
- Select 'Production mode ON/OFF' in the CDR23 coding function selection and confirm with the F8 key.
- Tuner parameters You can code the tuner parameters using this menu item.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select '911 (996)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the Control units menu and confirm with the >> key.
- Select 'CDR23' in the 911 (996) PCM2 function selection and confirm with the >> key.
- Select 'Coding' in the 911 (996) CDR23 function selection and confirm with the >> key.
- Select 'Tuner parameters' in the 911 (996) CDR23 coding function selection and confirm with the >> key.
- Select the required 'tuner parameters' in the CDR23 Modify coding function selection and confirm with the F8 key.
- Traffic broadcast
loudspeaker boost You can code the traffic broadcast loudspeaker boost using this menu item.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select '911 (996)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM2' in the Control units menu and confirm with the >> key
- Select 'CDR23' in the 911 (996) PCM2 function selection and confirm with the >> key.
- Select 'Coding' in the 911 (996) CDR23 function selection and confirm with the >> key.
- Select 'Traffic broadcast loudspeaker boost' in the 911 (996) CDR23 coding function selection and confirm with the >> key.
- Use the arrow keys to select the required 'traffic broadcast loudspeaker boost' in the CDR23 Modify coding function selection and confirm with the F8 key.

Data Transfer Fault
If faults are detected when the data is decoded, this is known as a data transfer fault. The faults can arise when the data is encoded, when the data is transferred through an input level that is optically too low or when the data is decoded. A fault entry is not recorded.

Diagnosis Distribution Line
The diagnosis distribution line is an electrical lead, which, as a stub cable, connects the individual MOST control modules in the system with one another. The existing MOST control modules are checked at regular intervals during communication with the control modules via the electrical/optical MOST.

Function Of The Components







Gateway
The gateway is integrated in the CDR23. It is a fixed component of each CDR23. It provides a connection from CAN comfort to the MOST via its nodes. Diagnostic and useful data is exchanged with the CAN via these nodes. It creates links to the following systems:
- CAN comfort
- Media Oriented Systems Transport (MOST), internal (electrical)
- Single CD
- Media Oriented Systems Transport (MOST), external bus (optical)

Identification
The diagnosis software number and the part numbers for the PCM2 can be read out under this menu item.
1. Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
2. Select '911 (996)' in the Vehicle type menu and confirm with the >> key.
3. Select 'PCM' in the Control units menu and confirm with the >> key.
4. Select 'CDR23' in the 911 (996) PCM2 function selection and confirm with the >> key,
5. Select 'Identification' in the 911 (996) CDR23 function selection and confirm with the >> key.
6. The message 'Diagnosis software number; CDR23 part number.' appears on the display.

Actual Values
It is possible to read out the unlock counter under the 'Actual values' menu item.

Menu item Function

- Unlock counter Under this menu item, it is possible to check the electrical and optical MOST during troubleshooting.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select '911 (996)' in the Vehicle type menu and confirm with the >> key.
- Select 'CDR23' in the Control units menu and confirm with the >> key.
- Select 'Actual values' in the CDR23 function selection and confirm with the >> key.
- Select 'Unlock counter' in the CDR23 Actual values function selection and confirm with the >> key.
- Read out values from the display field.

Lock/Unlock
A lock occurs when the signal sent from the CDR23 via the wake-up/diagnosis distribution line is understood and answered by the connected MOST control units; this results in a 'lock (connection)'. The lock is maintained until the signal disappears, i.e. an 'unlock' occurs.

MOST Actual And Required Installed Components Lists
All MOST control modules that are connected to the CDR23 are entered in the 'required installed components list'. The 'actual installed components list' is compared with the 'required installations list' each time the CDR23 is started. If an 'installed MOST control module' is not reported, the MOST is switched off optically and a fault is recorded in the gateway.

MOST - Optical/Electrical
MOST signals are transferred electrically within the PCM2 and optically outside of the CDR23. Internally, the CDR23 consists of one node (GW), which is installed in the device.

The data is transferred outside of the CDR23 via the optical waveguide, which creates a connection to the nodes in the external MOST control modules such as external amplifiers and/or CD changers (depending on the equipment). The gateway node represents the connection to CAN comfort.

Input Signals
The following queries can be run using this menu item:
- GAL (noise-dependent loudspeaker boost - NLB)
- Increment steps
- Key code
- Tuner parameters
- Status of the optical performance check

NOTE: Deactivate the 'automatic traffic announcement' before performing the diagnosis on the CDR23. If this is not done, the system will crash.

Menu item Function

- GAL (noise-dependent
loudspeaker
boost - NLB) You can read out the coded NLB value using this menu item.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select '911 (996)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the Control units menu and confirm with the >> key.
- Select 'CDR23' in the 911 (996) PCM2 function selection menu and confirm with the >> key.
- Select 'Input signals' in the 911 (996) CDR23 function selection menu and confirm with the >> key.
- Select "GAL (noise-dependent loudspeaker boost - NLB)" in the 911 (996) CDR23 function selection menu and confirm with the >> key.
- The current coded value is displayed in the 911 (996) CDR23 noise-dependent loudspeaker menu.
- Increment steps You can check the function of the CDR23 rotary knobs using this menu item.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select '911 (996)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the Control units menu and confirm with the >> key.
- Select 'CDR23' in the 911 (996) PCM2 function selection menu and confirm with the >> key.
- Select 'Input signals' in the CDR23 function selection menu and confirm with the >> key.
- Select "Increment steps" in the 911 (996) CDR23 Input signals menu and confirm with the >> key.
- The relevant change is displayed by turning the rotary knobs of the CDR23 if this functions correctly.
- key code You can check the function of the CDR23 operating buttons using this menu item.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select '911 (996)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the Control units menu and confirm with the >> key.
- Select 'CDR23' in the 911 (996) PCM2 function selection and confirm with the >> key.
- Select 'Input signals' in the CDR23 function selection and confirm with the >> key.
- Select "Key code" in the 911 (996) CDR23 function selection and confirm with the >> key.
- By operating the buttons of the CDR23, the relevant key code is displayed if this functions correctly.
- Tuner parameters You can check the tuner parameters of the CDR23 using this menu item.
- Connect and start the Porsche System Jester II No. 9588 and switch on the ignition.
- Select '911 (996)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the Control units menu and confirm with the >> key.
- Select 'CDR23' in the 911 (996) PCM function selection and confirm with the >> key.
- Select 'Input signals' in the CDR23 function selection and confirm with the >> key.
- Select "Tuner parameters" in the 911 (996) CDR23 Input signals function selection and confirm with the >> key.
- The currently coded country code is displayed in the CDR23 Tuner parameters menu.
- Status of the optical
performance check You can check the status of the optical waveguides using this menu item.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select '911 (996)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the Control units menu and confirm with the >> key.
- Select 'CDR23' in the 911 (996) PCM2 function selection and confirm with the >> key.
- Select 'Input signals' in the CDR23 function selection and confirm with the >> key.
- Select "Key code" in the 911 (996) CDR23 input signals function selection and confirm with the >> key.
- Select "Status of optical performance check" in the CDR23 input signals menu and confirm with the >> key.
- The result can be read out.

Single CD
The CD player is part of the CDR23.

Drive Links
Drive links of the CDR23 can be activated with this menu item. This allows the function of the drive links to be assessed very quickly using the Porsche System Tester II No. 9588.

The following drive links can be activated:
- All On display test
- Loudspeaker test
- Ring break diagnosis
- Ring break line diagnosis
- Set default values

NOTE: The activated drive link is automatically switched off after approximately 20 seconds.

Menu item Function

- All On display test You can check the function of the CDR23 display segments using this menu item.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select '911 (996)' In the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the Control units menu and confirm with the >> key.
- Select 'CDR23' In the 911 (996) PCM2 function selection and confirm with the >> key.
- Select 'Drive links' In the 911 (996) CDR23 function selection and confirm with the >> key.
- Select 'All On display test' in the CDR23 drive links function selection and confirm with the >> key.
- Press the F8 key to start the test.
- All segments of the CDR23 display are activated and can be checked for operation.
- Loudspeaker test You can check the function of the loudspeakers connected to the CDR23 using this menu Item.
- Connect and start the Porsche System Tester II No. 9588 and switch on the Ignition.
- Select '911 (996)' In the Vehicle type menu and confirm with the >> key.
- Select 'PCM' In the Control units menu and confirm with the >> key.
- Select 'CDR23' in the 911 (996) PCM2 function selection and confirm with the >> key.
- Select 'Drive links' in the 911 (996) CDR23 function selection and confirm with the >> key.
- Select 'Loudspeaker test' in the CDR23 drive links function selection and confirm with the >> key.
- Press the F8 key to start the test.
- Ring break diagnosis You can check the function of the diagnosis/wake-up line of the CDR23 using this menu item.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select '911 (996)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the Control units menu and confirm with the >> key.
- Select 'CDR23' in the 911 (996) PCM2 function selection and confirm with the >> key.
- Select 'Drive links' in the 911 (996) CDR23 function selection and confirm with the >> key.
- Select 'Ring break diagnosis' in the CDR23 drive links function selection and confirm with the >> key.
- Press the F8 key to start the test.
- The result of the automatic test is displayed on the CDR23 display
- Ring break line
diagnosis You can check the function of the CDR23 display segments using this menu Item.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select '911 (996)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the Control units menu and confirm with the >> key.
- Select 'CDR23' in the 911 (996) PCM2 function selection and confirm with the >> key.
- Select 'Drive links' in the 911 (996) CDR23 function selection and confirm with the >> key.
- Select 'All On display test' in the CDR23 drive links function selection and confirm with the >> key.
- Press the F8 key to start the test.
- All segments of the CDR23 display are activated and can be checked for operation.
- Set default values You can check the function of the CDR23 display segments using this menu item.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select '911 (996)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the Control units menu and confirm with the >> key.
- Select 'CDR23' in the 911 (996) PCM2 function selection and confirm with the >> key.
- Select 'Drive links' In the 911 (996) CDR23 function selection and confirm with the >> key.
- Select 'Set default values' in the CDR23 drive links function selection and confirm with the >> key.
- Press the F8 key to start the test.

CDR23 Control Module
The CDR23 is installed in the vehicle with and without amplifier (internal).

The CDR23 with amplifier (internal) is used if no sound package is installed. If there is no CD changer installed on the CDR23, an optical waveguide must be projected on the optical waveguide socket.

The CDR23 without amplifier (internal) is used if a sound package is installed.

NOTE: If there is no external amplifier (Harman or BOSE) installed on the CDR23 and if there is no CD changer installed, an optical waveguide must be projected on the optical waveguide socket.

The CDR23 control module includes the following components:

- Internal:
CDR23 GW
Internal amplifier, optional (depending on the equipment)
Tuner
Single CD
Wake-up and distribution line diagnosis control
Controller Area Network (CAN) Comfort

- External:
External amplifier (optional, Harman or BOSE)
CD changer (CDC), (optional)

Unlock Counter
Interruptions occur in the system if perfect communication is no longer possible. If the relevant threshold values are exceeded, an entry is recorded in the appropriate control module and the 'unlock counter' is incremented.

External Amplifier
The external amplifier (Harman or BOSE) is available as an optional feature and is linked to the CDR23 via the optical waveguide.

Wake-up Function
All control modules connected to the MOST are in sleep mode if the CDR23 is deactivated. When the CDR23 is switched on, a 'wake-up signal' is sent. This signal is answered by the MOST control modules that are connected via the optical MOST. The checkback signals are stored as a MOST actual and required installed components list.
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