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Home >> Porsche >> 2004 >> Boxster (986) F6-2.7L >> Repair and Diagnosis >> Accessories and Optional Equipment >> Accessory Control Display >> Testing and Inspection >> Part 2

Part 2



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.

Extended identification
Additional data present in the control unit can be read out using this menu item.

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 units menu and confirm with the [>>] key.
4. Select "PCM2 MMI" in the PCM2 function selection 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." appears on the display.
7. In the PCM2 - MMI identification function selection, the extended identification can be read out using the [F8] key or the [>>] key.

The following data can be read out:
- CRIN (Car Radio Identification Number)
- Date of ECU Manufacturing (DD;MM;YYYY)
- Repair Shop Code or Tester Serial 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
- Vehicle Manufacturer Diagnostic Index
- Vehicle Manufacturer ECU Hardware Number
- VIN (Vehicle Identification Number)

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)

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 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 units selection menu and confirm with the [>>] key.
4. Select "PCM2 MMI" in the PCM2 function selection 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." appears on the display.

Actual values
The date, time, traffic broadcast loudspeaker boost, time zone and the unlock counter can be read out under the "Actual values" menu item.

Menu item Function

- Date You can read out the current date from the PCM2 using this menu item.

- Connect and start the 9588 Porsche System Tester II and switch on the ignition.
- Select "Boxster (986)" in the Vehicle type menu and confirm with the key. >>
- Select "PCM" in the Control units menu and confirm with the key. >>
- Select "PCM2 MMI" in the Boxster (986) function selection and confirm with the [>>] key.
- Select "Actual values" in the Boxster (986) PCM2 MMI function selection and confirm with the [>>] key.
- Select "Date" in the PCM2 MMI actual values function selection and confirm with the [>>] key.
- Read out values from the display field.

- Transmission errors You can read out the number of transmission errors from the PCM2 using this menu item.

- Connect and start the 9588 Porsche System Tester II and switch on the ignition.
- Select "Boxster (986)" in the Vehicle type menu and confirm with the [>>] key.
- Select "PCM" in the Control units menu and confirm with the [>>] key.
- Select "PCM2 MMI" in the Boxster (986) PCM2 function selection and confirm with the [>>] key.
- Select "Actual values" in the PCM2 MMI function selection and confirm with the [>>] key.
- Select "Transmission errors" in the PCM2 MMI actual values function selection and confirm with the [>>] key.
- Read out values from the display field.

- Time You can read out the current time from the PCM2 using this menu item.

- Connect and start the 9588 Porsche System Tester II and switch on the ignition.
- Select "Boxster (986)" in the Vehicle type menu and confirm with the [>>] key.
- Select "PCM" in the Control units menu and confirm with the [>>] key.
- Select "PCM2 MMI" in the Boxster (986) PCM2 function selection and confirm with the [>>] key.
- Select "Actual values" in the PCM2 MMI function selection and confirm with the [>>] key.
- Select "Time" in the PCM2 MMI actual values function selection and confirm with the [>>] key.
- Read out values from the display field.

- Unlock counter You can read out the unlock counter using this menu item.

- Connect and start the 9588 Porsche System Tester II and switch on the ignition.
- Select "Boxster (986)" in the Vehicle type menu and confirm with the [>>] key.
- Select "PCM" in the Control units menu and confirm with the [>>] key.
- Select "PCM2 MMI" in the Boxster (986) PCM2 function selection and confirm with the [>>] key.
- Select "Coding" in the PCM2 MMI function selection and confirm with the [>>] key.
- Select "Unlock counter" in the PCM2 MMI coding function selection and confirm with the [>>] key.
- Read out values from the display field.

- Traffic broadcast You can read out the setting for the
loudspeaker boost traffic broadcast loudspeaker boost using this menu item.

- Connect and start the 9588 Porsche System Tester II and switch on the ignition.
- Select "Boxster (986)" in the Vehicle type menu and confirm with the [>>] key.
- Select "PCM" in the Control units menu and confirm with the [>>] key.
- Select "PCM2 MMI" in the Boxster (986) PCM2 function selection and confirm with the [>>] key.
- Select "Coding" in the PCM2 MMI function selection and confirm with the [>>] key.
- Select "Loudspeaker boost" in the PCM2 MMI coding function selection and confirm with the [>>] key.
- Read out values from the display field.

- Time zone You can read out the current time zone from the PCM2 using this menu item.

- Connect and start the 9588 Porsche System Tester II and switch on the ignition.
- Select "Boxster (986)" in the Vehicle type menu and confirm with the [>>] key.
- Select "PCM" in the Control units menu and confirm with the [>>] key.
- Select "PCM2 MMI" in the Boxster (986) PCM2 function selection and confirm with the [>>] key.
- Select "Coding" in the PCM2 MMI function selection and confirm with the [>>] key.
- Select "Time zone" in the PCM2 MMI coding 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 MMI via the wake-up/ diagnosis distribution line is understood and answered by the connected MOST control modules; this results in a "lock (connection)". The lock is maintained until the signal disappears, i.e. an "unlock" occurs.

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 component check
The following checks are available under this menu item:
- MOST system check
- Ring break diagnosis
- Ring break diagnosis line
- Optical performance check

NOTE: The engine must not be started during the automatic check. Follow the instructions of the 9588 Porsche System Tester II.

Test sequences are automatic. The test results are displayed.

Menu item Function

- MOST system check An automatic MOST system check can be carried out using this menu item.

- Connect and start the 9588 Porsche System Tester II and switch on the ignition.
- Select "Boxster (986)" in the Vehicle type menu and confirm with the [>>] key.
- Select "PCM" in the Control units selection menu and confirm with the [>>] key.
- Select "MOST component check" in the Boxster (986) CDR23 function selection menu and confirm with the [>>] key.
- Select "MOST system check" in the CDR23 MOST component check menu and confirm with the [>>] key.
- The test result is displayed.
Before replacing control units, the optical waveguide and the ring break diagnosis line must be checked.

- Ring break diagnosis An automatic ring break diagnosis can be carried out using this menu item.

- Connect and start the 9588 Porsche System Tester II and switch on the ignition.
- Select "Boxster (986)" in the Vehicle type menu and confirm with the [>>] key.
- Select "PCM" in the Control units selection menu and confirm with the [>>] key.
- Select "MOST component check" in the Boxster (986) CDR23 function selection menu and confirm with the [>>] key.
- Select "MOST ring break diagnosis" in the Boxster (986) CDR23 MOST component check menu and confirm with the[>>] key.
- The test result is displayed.
Before replacing control units, the optical waveguide and the ring break diagnosis line must be checked.

- Ring break diagnosis line An automatic check of the ring break diagnosis line can be carried out using this menu item.

- Connect and start the 9588 Porsche System Tester II and switch on the ignition.
- Select "Boxster (986)" in the Vehicle type menu and confirm with the [>>] key.
- Select "PCM" in the Control units selection menu and confirm with the [>>] key.
- Select "MOST component check" in the Boxster (986) CDR23 function selection menu and confirm with the [>>] key.
- Select "MOST ring break diagnosis line" in the Boxster (986) CDR23 MOST component check menu and confirm with the [>>] key.
- The test result is displayed.
Before replacing control units, the optical waveguide and the ring break diagnosis line must be checked.

- Optical performance check The transmission errors can be read out using this menu item.

- Connect and start the 9588 Porsche System Tester II and switch on the ignition.
- Select "Boxster (986)" in the Vehicle type menu and confirm with the [>>] key.
- Select "PCM" in the Control units selection menu and confirm with the [>>] key.
- Select "MOST component check" in the Boxster (986) CDR23 function selection menu and confirm with the [>>] key.
- Select "Optical performance check" in the Boxster (986) CDR23 MOST component check menu and confirm with the [>>] key.
- The test result is displayed.
Before replacing control units, the optical waveguide and the ring break diagnosis line must be checked.

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 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.

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 and wiring of the ring break diagnosis line are checked at regular intervals.

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.

Menu item Function


- Key code It is possible to check that the operating buttons are functioning during troubleshooting under this menu item.

- Connect and start the 9588 Porsche System Tester II and switch on the ignition.
- Select "Boxster" in the Vehicle type menu and confirm with the [>>] key.
- Select "PCM" in the Control units selection menu and confirm with the [>>] key.
- Select "PCM2 MMI" in the PCM2 function selection and confirm with the [>>] key.
- Select "Input signals" in the PCM2 MMI function selection and confirm with the [>>] key.
- "Key code" is displayed on the 9588 Porsche System Tester II. The function is activated by selecting it with the [>] key and pressing the [>>] key.
- If functioning correctly, the relevant code appears on the tester s display field when the operating buttons are activated.

- Increment steps This menu item shows the current status of the operating button.

- Connect and start the 9588 Porsche System Tester II and switch on the ignition.
- Select "Boxster" in the Vehicle type menu and confirm with the [>>] key.
- Select "Boxster" in the Vehicle type menu and confirm with the [>>] key.
- Select "PCM2 MMI" in the PCM2 function selection and confirm with the [>>] key.
- Select "Input signals" in the PCM2 MMI function selection and confirm with the [>>] key.
- "Increment steps" is displayed on the 9588 Porsche System Tester II. The function is activated by selecting it with the [>] key and pressing the [>>] key.
- If functioning correctly, the relevant code appears on the tester s display field when the operating buttons are activated.

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

Special function
The following functions can be run using this menu item:
- Read address book
- Write to address book
- Read user data
- Write user data
- Read coding
- Write coding
- MOST actual installed components list

Voice control system (VOCS) (optional)
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.

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 9588 Porsche System Tester II:
- Display colour black
- Display colour "coloured bars"
- Display colour blue
- Display colour red
- Display colour green
- Display colour white
- Set default values
- Ring break diagnosis
- Ring break line diagnosis

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

Menu item Function

- Display colour black The function Display colour black can be checked using this menu item.

- Connect and start the 9588 Porsche System Tester II and switch on the ignition.
- Select "Boxster (986)" in the Vehicle type menu and confirm with the [>>] key.
- Select "PCM" in the Control units menu and confirm with the [>>] key.
- Select "PCM2 MMI" in the Boxster (986) PCM2 function selection and confirm with the [>>] key.
- Select "Drive links" in the PCM2 MMI function selection and confirm with the [>>] key.
- Select "Display colour black" in the PCM2 MMI drive link function selection 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"
- Display colour blue
- Display colour red
- Display colour green
- Display colour white

- Set default values You can read out the set default values from the PCM2 MMI using this menu item.

- Connect and start the 9588 Porsche System Tester II and switch on the ignition.
- Select "Boxster (986)" in the Vehicle type menu and confirm with the [>>] key.
- Select "PCM" in the Control units selection menu and confirm with the [>>] key.
- Select "PCM2 MMI" in the Boxster (986) PCM2 function selection and confirm with the [>>] key.
- Select "Set default values" in the Boxster (986) PCM2 MMI function selection and confirm with the [>>] key.
- Read out values from the display field.

- Ring break diagnosis It is possible to check the electrical and optical MOST during troubleshooting under this menu item.

- Connect and start the 9588 Porsche System Tester II and switch on the ignition.
- Select "Boxster (986)" in the Vehicle type menu and confirm with the [>>] key.
- Select "PCM" in the Control units menu and confirm with the [>>] key.
- Select "PCM2 MMI" in the Boxster (986) PCM2 function selection and confirm with the [>>] key.
- Select "Ring break diagnosis" in the Boxster (986) PCM2 MMI function selection and confirm with the [>>] key.
- Read out values from the display field.

- Ring break line diagnosis You can check the ring break diagnosis line using this menu item.

- Connect and start the 9588 Porsche System Tester II and switch on the ignition.
- Select "Boxster (986)" in the Vehicle type menu and confirm with the [>>] key.
- Select "PCM" in the Control units menu and confirm with the [>>] key.
- Select "PCM2 MMI" in the Boxster (986) PCM2 function selection and confirm with the [>>] key.
- Select "Ring break line diagnosis" in the Boxster (986) PCM2 MMI function selection and confirm with the [>>] key.
- Read out values from the display field.

PCM2 control module (head unit)
The PCM2 control unit (head unit) includes the following components:

Internal:
PCM2 gateway
PCM2 Man Machine Interface (MMI)
Amplifier (internal)
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.

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
All control units connected to the MOST are in sleep mode if the PCM2 is deactivated. 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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