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PCM2 Gateway Control Module Function



Control Unit Function - Gateway

Terminating Resistors On The CAN
Terminating resistors are fitted to each end of the wiring to prevent reflection on the wiring. These terminating resistors are integrated into each control module. The interconnection prevents the resistors from being measured with the ohmmeter from the outside.

Audio Tests
The following functions can be run using this menu item:
- Manual single selection
- Automatic test

Menu item Function

- Manual single selection Using this menu item, a manual audio test can be carried out.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select 'Boxster (986)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the control modules selection and confirm with the >> key.
- Select 'PCM2 GW' in the PCM2 function selection and confirm with the >> key.
- Select menu item Audio tests.
- Select menu item "Manual single selection".
- Select a particular system and confirm with the >> key.

The following selection is available:
- Front left, test frequency 1 kHz
- Front right, test frequency 1 kHz
- Door speaker left, test frequency 1 kHz
- Door speaker right, test frequency 1 kHz
- F5 Boost volume
- F6 Lower volume
- F8 Start test
- Automatic test Using this menu item, a manual audio test can be carried out.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select 'Boxster (986)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the control modules selection and confirm with the >> key.
- Select 'PCM2 GW' in the PCM2 function selection and confirm with the >> key.
- Select the menu item 'Audio tests' and confirm with the >> key.
- Select the menu item 'Automatic test' and confirm with the >> key.

The test sequence is automatic.

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 modules, via CAN Comfort to the PCM2 gateway, via the electrical MOST in the PCM2 and via the optical MOST outside of the PCM2.

CD Changer (CDC)
The CDC is available as an optional feature and is linked to the PCM2 via the optical waveguide.

Coding Table










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

Menu item Function

- Units Using this menu item, you can code the relevant units.
- Connect and start the Porsche System Tester II No. 9588 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 GW' in the Boxster (986) PCM2 function selection menu and confirm with the >> key.
- Select 'Coding' in the PCM2 GW function selection menu and confirm with the >> key.
- Select "Units" in the PCM2 GW coding menu and confirm with the >> key.
- Select "the relevant units" from the menu item that is displayed and code them with the F8 key.

The following selection is available:
- Metric, RoW (degree C, litre, km)
- UK English (degree C, gallon, mph)
- US English (degree F, gallon, mph)
- Vehicle type vehicle
coding Under this menu item, the PCM2 GW corresponding to the vehicle type can be coded.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select 'Boxster (986)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the Control unit menu and confirm with the >> key.
- Select 'PCM2-GW' in the PCM2 function selection menu and confirm with the >> key.
- Select 'Coding' in the PCM2 GW function selection menu and confirm with the >> key.
- Select 'Vehicle type vehicle coding' in the Coding menu and confirm with the >> key.
- Select "Boxster (986)" in the menu and code with the F8 key.
- Vehicle version vehicle
coding Under this menu item, the PCM2 GW corresponding to the vehicle version can be coded.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select 'Boxster (986)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the Control unit menu and confirm with the >> key.
- Select 'Coding' in the PCM2 GW function selection menu and confirm with the >> key.
- Select 'Vehicle version' in the PCM2 GW coding menu and confirm with the >> key.
- Select the relevant version 'Coupe, Cabrio, Targa' in the menu and code with the F8 key.
- Right/left-hand drive
vehicle coding Under this menu item, the PCM2 GW corresponding to the vehicle version can be coded.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select 'Boxster (986)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the Control unit menu and confirm with the >> key.
- Select 'PCM2-GW' in the PCM2 function selection menu and confirm with the >> key.
- Select 'Coding' in the PCM2 GW function selection menu and confirm with the >> key.
- Select "Right/left-hand drive vehicle coding" in the PCM2 GW coding menu and confirm with the >> key.
- Select "Right or left-hand drive" in the menu corresponding to the vehicle equipment and code with the F8 key.
- Air conditioning
with/without Under this menu item, the PCM2 GW corresponding to the air conditioning equipment can be coded.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select 'Boxster (986)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the control modules selection and confirm with the >> key.
- Select 'PCM2 GW' in the PCM2 function selection and confirm with the >> key.
- Select 'Coding' in the PCM2 GW function selection and confirm with the >> key.
- Select 'Air conditioning with/without' in the PCM2 GW coding function selection and confirm with the >> key.
- Select "Air conditioning with/without" corresponding to the equipment in the Modify PCM2 GW coding function selection and code with the F8 key.
- Country coding Using this menu item, you can code the country code.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select 'Boxster (986)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the control modules selection and confirm with the >> key.
- Select 'PCM2 GW' in the PCM2 function selection and confirm with the >> key.
- Select 'Coding' in the PCM2 GW function selection and confirm with the >> key.
- Select "Country coding" in the PCM2 GW Coding function selection and confirm with the >> key.
- Select "the relevant country coding" from the menu item that is displayed and code it with the F8 key.
- MOST switch Under this menu item, the MOST switch corresponding to the vehicle configuration can be coded.
- Connect and start the Porsche System Tester II No. 9588 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 GW' in the PCM2 function selection and confirm with the >> key.
- Select 'Coding' in the PCM2 GW function selection and confirm with the >> key.
- Select 'MOST switch open/closed' "MOST switch open/closed" in the PCM2 GW coding function selection and confirm with the >> key.
- Select 'MOST switch open/MOST switch closed' from the menu displayed and code with the F8 key.

The following selection is available:
- MOST switch open
- MOST switch closed

- PCM2 code It is possible to code the PCM2 code under this menu item after replacing the PCM2.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select 'Boxster (986)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the control modules selection and confirm with the >> key.
- Select 'PCM2 GW' in the PCM2 function selection and confirm with the >> key.
- Select 'Coding' in the PCM2 GW function selection and confirm with the >> key.
- Select 'PCM2 code' in the PCM2 GW coding function selection.
- Take the PCM2 code from IPAS, enter it and code it with the F8 key.
- Production mode The PCM2 is set in the 'Production mode ON' low-power mode in the factory and this must be switched off on putting into service.
- Connect and start the Porsche System Tester II No. 9588 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 GW' in the PCM2 function selection and confirm with the >> key.
- Select 'Coding' in the PCM2 GW function selection and confirm with the >> key.
- Select 'Production mode' in the PCM2 GW Coding function selection and confirm with the >> key.
- Select "Production mode OFF" from the menu item displayed and code it with the F8 key.

The following selection is available:
- Production mode on
- Production mode off

- Tuner parameters Using this menu item, you can code the tuner parameters (country-specific tuner setting) for the country of registration.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select 'Boxster (986)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the control modules selection and confirm with the >> key.
- Select 'PCM2 GW' in the Boxster (986) PCM2 function selection and confirm with the >> key.
- Select 'Coding' in the PCM2 GW function selection and confirm with the >> key.
- Select "Tuner parameters" in the PCM2 GW Coding function selection and confirm with the >> key.
- Select the 'country code' for the country of registration and code with the F8 key.

Data Transfer Fault
If faults are detected when the data is decoded, this is known as a delta transfer fault. The faults can arise when data are being coded, transferred when the optical input level is too low or when being 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 Porsche System Tester II No. 9588 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 'PCM2 GW' in the PCM2 function selection and confirm with the >> key.
5. Select 'Identification' in the PCM2 GW function selection and confirm with the >> key.
6. "Diagnosis software number; PCM2 parts number" appears on the display.
7. Confirm PCM2 GW extended identification with the F8 key or the >> key.

The following data can be read out:
- CRIN (Car Radio Identification Number)
- Date of ECU Manufacturing (YYYY;MM;DD)
- 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), external bus (optical)
- Amplifier optional (Harman or BOSE)
- CD changer
- Telephone/telematics

Applies only to PCM2:
- Media Oriented Systems Transport (MOST), internal (electrical)
- Voice control system (VOCS) (optional/insertion)
- Navigation (optional/insertion)
- Man Machine Interface (MMI)
- Single CD

Identification
The diagnosis software number and the part number 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 '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 'PCM2 GW' in the PCM2 function selection and confirm with the >> key.
5. Select "Identification" in the PCM2 GW function selection and confirm with the >> key.
6. "Diagnosis software number; PCM2 parts number" appears on the display.
7. Confirm PCM2 GW extended identification with the F8 key or the >> key.

Actual Values
Under the 'Actual values' menu item, the unlock counter and the supply voltage can be read out.

Menu item Function

- Unlock counter Under this menu item, the unlock counter can be read out during troubleshooting.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select 'Boxster (986)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the control modules selection and confirm with the >> key.
- Select 'PCM2 GW' in the PCM2 function selection and confirm with the >> key.
- Select 'Actual values' in the PCM2 GW function selection and confirm with the >> key.
- Select "Unlock counter" in the PCM2 GW actual values function selection and confirm with the >> key.
- Read out values from the display field.
- Supply voltage Under this menu item, the supply voltage can be read out during troubleshooting.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select 'Boxster (986)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the control modules selection and confirm with the >> key.
- Select 'PCM2 GW' in the PCM2 function selection and confirm with the >> key
- Select 'Actual values' in the PCM2 GW function selection and confirm with the >> key.
- Select "Supply voltage" in the PCM2 GW 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 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 mu.seconds) 'unlock'.

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

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.

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 - 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. Internally, the CDR23 consists of one node (GW) which is installed in the CDR23.

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.

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:
- Registry startup status
- Internal ring startup status
- External ring startup status

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

- Registry startup status It is displayed under this menu item that installed MOST control modules can be read out from the actual installed components list.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select 'Boxster (986)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the control modules selection and confirm with the >> key.
- Select 'PCM2 GW' in the PCM2 function selection and confirm with the >> key.
- Select 'Input signals' in the PCM2 GW function selection and confirm with the >> key.
- Select "Startup status registry" in the PCM2 GW input signals function selection and confirm with the >> key.
- Read out values from the display field.
- Internal ring startup
status It is displayed under this menu item that installed MOST control modules can be read out from the actual installed components list.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select 'Boxster (986)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the control modules selection and confirm with the >> key.
- Select 'PCM2 GW' in the PCM2 function selection and confirm with the >> key.
- Select 'Input signals' in the PCM2 GW function selection and confirm with the >> key.
- Select "Startup status" in the PCM2 GW input signals function selection and confirm with the >> key.
- Read out values from the display field.
- 'Internal ring startup status' internal MOST (electrical) is functional.
- External ring startup
status It is displayed under this menu item that installed MOST control modules can be read out from the actual installed components list.
- Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
- Select 'Boxster (986)' in the Vehicle type menu and confirm with the >> key.
- Select 'PCM' in the control modules selection and confirm with the >> key.
- Select 'PCM2 GW' in the PCM2 function selection and confirm with the >> key.
- Select 'Input signals' in the PCM2 GW function selection and confirm with the >> key.
- Select "Startup status" in the PCM2 GW input signals function selection and confirm with the >> key.
- Read out values from the display field.
- 'External ring startup status' internal MOST (electrical) is functional.
- 'External ring startup status' external MOST (optical) is functional.

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

Special Function
The following functions can be run using this menu item:
- Antenna diversity test
- Set tuner frequency
- Reset
- Wakeup sequence of the MOST 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.

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 No. 9588:
- Left balance
- Central balance
- Right balance
- Bass - maximum value
- Bass - minimum value
- Bass - centre position
- Rear fader
- Middle fader
- Front fader
- MOST power reduction
- MOST switch
- Mute
- MOST bus switch
- Output switch
- Treble - minimum value
- Treble - centre position
- Treble - maximum value
- Volume - maximum value
- Volume - minimum value
- Volume - centre position

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

PCM2 Control Module (Head Unit)
The PCM2 control module (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.

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
An external amplifier ('Harman or BOSE') is available as an option and is linked to the PCM2/CDR23 via the optical waveguide.

Internal Amplifier
The internal amplifier (optional depending on equipment) is part of the PCM2 and is 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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