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MMI



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.

NOTE: Using the function Reset all coding/transfer counters all set fault counters of all components can be collectively reset to 0.

Extended fault memory
Additional data from the PCM2 MMI can be read out using this menu item:
- Tuner communication fault.
- Fault type:.
- Communication fault
- Frequency counter.
- First occurrence (month, day)
- First occurrence (temperature)
- Speed - first occurrence
- Supply voltage - first occurrence
- hour meter - first occurrence
- Last occurrence (month, day)
- Last occurrence (temperature)
- Last occurrence (speed)
- Supply voltage - last occurrence
- hour meter - last occurrence

NOTE: Deactivate the automatic traffic announcement before performing the diagnosis on the PCM2. If this is not done, the diagnosis will abort (applies only to software version numbers < 03).

Extended identification
The following data from the PCM2 MMI can be read out using this menu item:
- CRIN (Car Radio Identification Number)
- VIN (Vehicle Identification Number)
- Part number
- System Supplier ECU Hardware Number (cw, year)
- System Supplier ECU Hardware Version Number.
- System Supplier ECU Software Number (cw, year)
- System Supplier ECU Software Version Number.
- Porsche workshop number
- Diagnosis software number
- Date ECU manufacturing (YYYY.MM.DD).

1. Connect and start the Porsche System Tester II 9588 and switch on the ignition.
2. Select 911 Turbo (996) 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 PCM2 MMI in the 911 Turbo (996) PCM2 function selection and confirm with the >> key.
5. Select the Identification menu item and press the >> key.
6. Diagnosis software number; PCM2 parts number appears on the display.
7. Extended identification can be called up with the F8 key.

NOTE: Deactivate the automatic traffic announcement before performing the diagnosis on the PCM2. If this is not done, the diagnosis will abort (applies only to software version numbers < 03).

Function of the components


Function Of The Components:






Gateway
The gateway is integrated in the PCM2. Together with the MMI, it is a fixed component of each PCM2. It provides a connection to CAN Comfort 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)
- Voice control system (VOCS) (optional/insertion)
- Navigation (optional/insertion)
- Man Machine Interface (MMI)
- Single CD
- Media Oriented Systems Transport (MOST), external bus (optical)
- Amplifier optional (Harman or BOSE)
- CD changer
- Telephone/telematics

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 9588 and switch on the ignition.
2. Select 911 Turbo (996) in the Vehicle type menu and confirm with the >> key.
3. Select PCM2 in the control modules selection and confirm with the >> key.
4. Select PCM2 MMI in the 911 Turbo (996) PCM2 function selection menu and confirm with the >> key.
5. Select Identification in the PCM2 MMI function selection and confirm with the >> key.
6. Diagnosis software number; PCM2 part number appear on the display.
7. Call II Extended identification by pressing the F8 key

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

Menu item
- Date

Function
Using this menu item, you can read out the current date from the PCM2
- Connect and start the Porsche System Tester II 9588 and switch on the ignition.
- Select 911 Turbo (996) in the Vehicle type menu and confirm with the >> key.
- Select PCM2 in the control modules selection and confirm with the >> key.
- Select PCM2 MMI in the 911 Turbo (996) function selection and confirm with the >> key.
- Select the Actual values menu item and press the >> key.
- Select Date in the PCM2-MMI Actual values menu with the > key and confirm with the >> key.
- Read out values from the display field.

Menu item
- Transmission errors

Function
Using this menu item, you can read out the current time from the PCM2.
- Connect and start the Porsche System Tester II 9588 and switch on the ignition.
- Select 911 Turbo (996) in the Vehicle type menu and confirm with the >> key.
- Select PCM2 in the control modules selection and confirm with the >> key.
- Select PCM2 MMI in the 911 Turbo (996) function selection and confirm with the >> key.
- Select the actual values menu item and confirm with the >> key.
- Select Transmission error in the PCM2-MMI Actual values menu with the > key and confirm with the >> key.
- Read out values from the display field.

Menu item
- Time

Function
Using this menu item, you can read out the current time from the PCM2
- Connect and start the Porsche System Tester II 9588 and switch on the ignition.
- Select 911 Turbo (996) in the Vehicle type menu and confirm with the >> key.
- Select PCM2 in the control modules selection and confirm with the >> key.
- Select PCM2 MMI in the 911 Turbo (996) function selection and confirm with the >> key.
- Select the actual values menu item and confirm with the >> key.
- Select Time in the PCM2-MMI Actual values menu with the > key and confirm with the >> key.
- Read out values from the display field.

Menu item
- Unlock counter

Function
Using this menu item, setting of the traffic broadcast loudspeaker boost can be read out.
- Connect and start the Porsche System Tester II 9588 and switch on the ignition.
- Select 911 Turbo (996) in the Vehicle type menu and confirm with the >> key.
- Select PCM2 in the control modules selection and confirm with the >> key.
- Select PCM2 MMI in the 911 Turbo (996) PCM2 function selection and confirm with the >> key.
- Select Coding in the PCM2-MMI function selection menu and press the >> key.
- Select Unlock counter in the PCM2-MMI Coding menu with the > key and confirm with the >> key.
- Read out values from the display field.

Menu item
- Traffic broadcast loudspeaker boost

Function
Using this menu item, setting of the traffic broadcast loudspeaker boost can be read out.
- Connect and start the Porsche System Tester II 9588 and switch on the ignition.
- Select 911 Turbo (996) in the Vehicle type menu and confirm with the >> key.
- Select PCM2 in the control modules selection and confirm with the >> key.
- Select PCM2 MMI in the 911 Turbo (996) PCM2 function selection and confirm with the >> key.
- Select Coding in the PCM2-MMI function selection menu and press the >> key.
- Select Traffic broadcast loudspeaker boost in the PCM2-MMI Coding menu with the > key and confirm with the >> key.
- Read out values from the display field.

Menu item
- Time zone

Function
Using this menu item, you can read out the current time zone from the PCM2.
- Connect and start the Porsche System Tester II 9588 and switch on the ignition.
- Select 911 Turbo (996) in the Vehicle type menu and confirm with the >> key.
- Select PCM2 in the control modules selection and confirm with the >> key.
- Select PCM2 MMI in the 911 Turbo (996) function selection and confirm with the >> key.
- Select Coding in the PCM2 MMI menu and confirm with the >> key.
- Select Time zone in the PCM2-MMI Coding menu with the > key and confirm with the >> key.
- Read out values from the display field.

Man Machine Interface (MMI)
The MMI is part of the PCM2 (on the main board). It carries out the diagnostics of the ring break diagnosis line (stub cable) and the diagnostics of the optical distribution line.

MOST actual and required installed components lists
All MOST control modules that are connected to the PCM2 are entered via diagnostic tester in the required installed components list. Only the MOST control units recorded in the MOST required installed components list are activated. An actual installed components list of detected devices is written and saved when the PCM2 is started.

MOST lock/unlock
A lock occurs when the signal sent from the MMI via the MOST optical/electrical is understood and answered by the connected MOST control modules. This applies a correct optical MOST signal. The lock is maintained until the signal is no longer detectable for a longer period of time (several �seconds) unlock.

NOTE: Using the function Reset all coding/transfer counters all set fault counters of all components can be collectively reset to 0.

MOST component check

NOTE: When there is a customer complaint or identifiable problems but no fault code entries, firstly the MOST component check is to be selected in the PCM2 function selection menu and then the MOST system check is to be carried out.

The MOST component check can be reached via the menu PCM2 function selection. This comprises a summary of the following check processes:
- Data transmission check.
- MOST system check (with engine running).
- Ring break diagnosis (with engine running).

The MOST components check MOST system check is to be carried out when the display indicates unavailable MOST control modules. If no fault code is stored, the * symbol indicates a varying required and actual installed components list in the Control modules menu in front of the PCM2 system and in the PCM2 MMI function selection in front of the selection MOST required installed components list. A comparison of these two lists can determine faulty components.

Data transmission check

NOTE: Using the function Reset all coding/transfer counters all set fault counters of all components can be collectively reset to 0.

Menu item
- Data transmission check

Function
Using this menu item, the quality of the data transmission can be assessed. This is a counter which leads to an increase in the value if faults occur within a certain time period. The check is carried out continuously at predetermined intervals.
- Connect and start the Porsche System Tester II 9588 and switch on the ignition.
- Select 911 Turbo (996) in the Vehicle type menu and confirm with the >> key.
- Select PCM2 in the Control modules menu and confirm with the >> key.
- Select MOST components check in the PCM2 function selection and confirm with the >> key.
- Select Data transmission check in the 911 Turbo (996) PCM2 MOST components check function selection and confirm with the >> key.

MOST system check (with engine running)

Menu item
MOST system check (with engine running).

Function
Using this menu item, a MOST system check can be carried out with the ignition on. The following checks are carried out automatically and their results are displayed.
- Gateway start-up condition is read out.
- MOST installed components list (required and actual installed components list) is analysed
- Ring line diagnosis.
- Connect and start the Porsche System Tester II 9588 and switch on the ignition.
- Select 911 Turbo (996) in the Vehicle type menu and confirm with the >> key.
- Select PCM2 in the Control modules menu and confirm with the >> key.
- Select MOST components check in the PCM2 function selection and confirm with the >> key.
- Select MOST system check in the 911 Turbo (996) PCM2 MOST components check function selection and confirm with the >> key.
- Follow the Tester instructions.

Whenever there are several ring breaks, the 1st ring break is displayed in the following order:
- PCM2 Gateway > external amplifier.
- External amplifier > CD changer.
- CD changer > telephone.
- Telephone > PCM2 MMI.

is displayed. Then the check is terminated.
- Start the optical performance check.

Ring break diagnosis (with engine running)

Menu item
- Ring break diagnosis (with engine running).

Function
Using this menu item, a ring break diagnosis can be carried out (with the engine running).
- Connect and start the Porsche System Tester II 9588 and switch on the ignition.
- Select 911 Turbo (996) in the Vehicle type menu and confirm with the >> key.
- Select PCM2 in the Control modules menu and confirm with the >> key.
- Select MOST components check in the PCM2 function selection and confirm with the >> key.
- Select Ring break diagnosis (when the engine is running) in the 911 Turbo (996) PCM2-GW MOST components check function selection and confirm with the >> key.


MOST - optical/electrical
MOST signals are transferred electrically within the PCM2 and optically outside of the PCM2. Internally, the PCM2 consists of at least 2 nodes (GW and MMI), which are installed in the device and can also be expanded to four nodes by adding the navigation and VOCS nodes.

The data is transferred outside of the PCM2 via the optical waveguide, which creates a connection to the nodes in the external MOST control modules such as external amplifiers, CD changers, and/or telephone/telematics (depending on the equipment). The gateway node represents the connection to CAN Comfort.

MOST switch
The MOST - switch - switch is part of the PCM2. It keeps the electrical MOST closed if no other MOST control unit 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 connected MOST control modules.
- When the Switch closed parameter is set, the switch remains closed even in existing MOST control modules. Communication is then not possible.

Navigation
The navigation module is designed as a module box, which can be inserted in the PCM2 as an option. After the insertion, an electronic switch is opened automatically and the module is integrated into the MOST ring.

Ring break diagnosis line
The ring break diagnosis 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.

Drive links
Drive links of the PCM2 can be activated with this menu item. This allows the function of the drive links to be assessed very quickly.

The following drive links can be activated with the Porsche System Tester II 9588:
- Display colour black
- Display colour coloured bars
- Display colour blue
- Display colour red
- Display colour green
- Display colour white

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

Menu item
- Display colour black

Function
Using this menu item, the function Display colour black can be checked.
- Connect and start the Porsche System Tester II 9588 and switch on the ignition.
- Select 911 Turbo (996) in the Vehicle type menu and confirm with the >> key.
- Select PCM2 in the control modules selection and confirm with the >> key.
- Select PCM2 MMI in the 911 Turbo (996) function selection and confirm with the >> key.
- Select Drive links in the PCM2 MMI menu and press the >> key.
- Select Display colour black in the PCM2-MMI Drive links menu with the > key and confirm with the F8 key.
- The display must show the correct colour.

Proceed in the same way with the following tests.
- Display colour coloured bars u Display colour blue
- Display colour red
- Display colour green u Display colour white

PCM2 control module (head unit)
The PCM2 control unit (head unit) includes the following components:
Internal:
PCM2 gateway
PCM2 Man Machine Interface (MMI)
Internal amplifier (optional, depending on the equipment)
Tuner
Single CD
Navigation (optional/insertion)
VOCS (voice control system) (optional/insertion)
Controller Area Network (CAN) Comfort
MOST switch
External:
External amplifier (optional, Harman or BOSE)
CD changer (CDC), (optional)
Telephone/telematics (optional)

The PCM2 consists of at least two but a maximum of four MOST nodes, (Gateway, MMI and Navigation and VOCS (optional)), which communicate with each other electronically via the MOST. Data is transferred outside of the PCM2 via the optical MOST.

Input signals
The following queries can be run using this menu item:
- Key code
- Increment steps

NOTE: Deactivate the automatic traffic announcement before performing the diagnosis on the PCM2. If this is not done, the diagnosis will abort (applies only to software version < 03).

Menu item
- Key code

Function
This menu item can be used to u Connect and start the Porsche System Tester II 9588 and switch on the ignition.
- Select 911 Turbo (996) in the Vehicle type menu and confirm with the >> key.
- Select PCM2 in the Control modules menu and confirm with the >> key.
- Select PCM2 MMI in the 911 Turbo (996) function selection menu and confirm with the >> key.
- Select Input signals in the 911 Turbo (996) menu and confirm with the >> key.
- Select Key code in the PCM2-MMI Input signals menu with the > key and confirm with the >> key.
- By operating the control buttons, the code of each key is output to the display if its function is correct.

Menu item
- Increment steps

Function
Using this menu item, the function of the volume and selection pointer rotary switch can be checked.
- Connect and start the Porsche System Tester II 9588 and switch on the ignition.
- Select 911 Turbo (996) in the Vehicle type menu and confirm with the >> key.
- Select PCM in the Control modules menu and confirm with the >> key.
- Select PCM2 MMI in the 911 Turbo (996) function selection menu and confirm with the >> key.
- Select Input signals in the 911 Turbo (996) menu and confirm with the >> key.
- Select Increment steps in the PCM2-MMI Input signals menu, mark with the > key and confirm with the >> key.
- To check, rotate the volume control or selection pointer. If function is correct, each change will be displayed on the Porsche System Tester II 9588.

Single CD
The CD player is part of the PCM2. It is used to update the navigation system.

Voice control system (VOCS)
The VOCS is designed as a module box which can be pushed into the PCM2 (optional). After the insertion, an electronic switch is opened and the module is integrated into the MOST ring.

Telephone/telematics
The telephone/telematics feature is available as an option and is linked to the PCM2 via the optical waveguide.

Tuner
The tuner is part of the PCM2 (on the main board).

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 PCM2 via the optical waveguide.

Internal amplifier
The internal amplifier is part of the PCM2 (installed on the main board).

Wake-up function
In an idle state, all control modules that are connected to the MOST are in sleep mode. When the PCM2 is switched on, a light is switched on via the MMI. It is reinforced and passed on by the MOST control modules that are connected.
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