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Home >> Porsche >> 2003 >> 911 GT2 (996) F6-3.6L Turbo >> Repair and Diagnosis >> Accessories and Optional Equipment >> General Module >> Testing and Inspection >> Component Tests and General Diagnostics >> PCM2/CDR23 MMI >> PCM2 MMI Control Module Function >> Terminal Resistance

Terminal Resistance



Control Unit Function (part 1)

Terminal Resistance On The CAN
To prevent reflection on the wiring, the ends of the wires are each provided with a terminal resistor, which 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 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
Under this menu item Modify coding' it is possible to extract the PCM2 codes and to code them on a country-specific basis.

Menu Item Function

- Call is accepted
automatically Under this menu item, it is possible to code the PCM2 in such a way that an in-coming call is accepted automatically:
- Connect and start the Porsche System Tester II No. 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 PCM2 function selection menu and confirm with the >> key.
- Select 'PCM2-MMI' in the 911 Turbo (996) function selection menu and confirm with the >> key.
- Select 'Coding' in the PCM2-MMI function selection menu and confirm with the >> key.
- Select "Call is accepted automatically" in the PCM2-MMI coding menu and confirm with the >> key.
- Select "Call is accepted automatically" from the menu item that is displayed and code it with the F8 key.

- Display format Using this menu item, you can read out the number of transmission faults.
- Connect and start the Porsche System Tester II No. 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 and confirm with the >> key.
- Select coding menu item and confirm with the >> key.
- Select 'Display format' in the PCM2-MMI coding with the > key and confirm with the >> key.
- Make the appropriate selection with the arrow keys and code with the F8 key.

- Date Using this menu item, you can code the date.
- Connect and start the Porsche System Tester II No. 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 module menu 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 confirm with the >> key.
- Select 'Date' in the PCM2-MMI coding with the Down arrow key and confirm with the >> key.
- Make the appropriate selection with the arrow keys and code with the F8 key.

- 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 '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) PCM function selection menu and confirm with the >> key.
- Select 'PCM2-MMI' in the 911 Turbo (996) function selection menu and confirm with the >> key.
- Select 'Coding' in the PCM2-MMI function selection menu and confirm with the >> key.
- Select "Units" in the PCM2-MMI coding menu and confirm with the >> key.
- Select "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 Using this menu item, you can code the PCM2-MMI according to the vehicle type:
- Connect and start the Porsche System Tester II No. 9588, start and switch on the ignition
- Select '911 Turbo (996)' in the vehicle type menu and confirm with the ->| key.
- Select 'PCM' in the control module menu and confirm with the >> key.
- Select 'PCM2-MMI' in the 911 Turbo (996) function selection menu and confirm with the >> key.
- Select 'Coding' in the PCM2-MMI function selection menu and confirm with the >> key.
- Select 'Vehicle type coding' in the coding menu and confirm with the > key.
- Select "911 Turbo (996)" and code with the F8 key.

- Vehicle type vehicle
version Using this menu item, you can code the PCM2-MMI according to the vehicle type:
- Connect and start the Porsche System Tester II No. 9588, start and switch on the ignition.
- Select '911 Turbo (996)' in the vehicle type menu and confirm with the ->| key.
- Select 'PCM' in the control module menu and confirm with the >> key.
- Select 'Coding' in the 911 Turbo (996) function selection menu and confirm with the >> key.
- Select "Vehicle type" in the PCM2 coding menu and confirm with the >> key.
- Select appropriate vehicle type "Coupe, Cabrio, Targa" and code with the F8 key.

- Right/left-hand drive
vehicle coding Using this menu item, you can code the PCM2-MMI according to the vehicle type:
- Connect and start the Porsche System Tester II No. 9588, start and switch on the ignition.
- Select '911 Turbo (996)' in the vehicle type menu and confirm with the ->| key.
- Select 'PCM' in the control module menu and confirm with the >> key.
- Select 'Coding' in the 911 Turbo (996) function selection menu and confirm with the >> key.
- Select "Vehicle type coding right/left-hand drive" in the PCM2-MMI coding menu and confirm with the >> key.
- Select 'Vehicle type coding right/left-hand drive' in the PCM2 coding menu and confirm with the >> key.
- Select "Right/left-hand drive" from the menu, depending on the vehicle equipment, and code with the F8 key.

- NDV (Noise-dependent
volume control) Using this menu item, you can code the PCM2-MMI according to the noise-dependent volume control.
- Connect and start the Porsche System Tester II No. 9588, start and switch on the ignition.
- Select '911 Turbo (996)' in the vehicle type menu and confirm with the ->| key.
- Select 'PCM' in the control module menu and confirm with the >> key.
- Select 'PCM2-MMI' in the 911 Turbo (996) function selection menu and confirm with the >> key.
- Select "Coding" in the PCM2-MMI menu and confirm with the >> key.
- Select "Coding" in the PCM2-MMI menu and confirm with the >> key.
- Select 'GAL' in the PCM2 coding menu and confirm with the >> key.
- Select "Value" in the menu according to the desired volume and code with the F8 key.

- With/without
air conditioning Using this menu item, you can code the PCM2-MMI according to the air conditioning equipment:
- Connect and start the Porsche System Tester II No. 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 selection and confirm with the >> key.
- Select 'PCM2-MMI' in the PCM2 function selection and confirm with the >> key.
- Select 'Coding' in the PCM2-MMI menu and confirm with the >> key.
- Select 'Air conditioning' in the PCM2-MMI coding menu and confirm with the >> key.
- Select "Air conditioning with/without" in the PCM2-MMI coding menu item according to the equipment 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 '911 Turbo (996)' in the vehicle type menu and confirm with the ->| key.
- Select 'PCM' in the control modules selection and confirm with the >> key.
- Select 'PCM2-MMI' in the PCM2 function selection and confirm with the >> key.
- Select 'Coding' in the PCM2-MMI menu and confirm with the >> key.
- Select 'Country coding' in the PCM2-MMI coding menu and confirm with the >> key.
- Select "Relevant country coding" from the menu that is displayed and code it with the F8 key.

- Main setup menu

- PCM2 code It is possible to encode 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 '911 Turbo (996)' in the vehicle type menu and confirm with the ->| key.
- Select 'PCM' in the control modules selection and confirm with the >> key.
- Select 'PCM2-MMI' in the 911 Turbo (996) function selection menu and confirm with the >> key.
- Select 'Coding' in the PCM-MMI function selection menu and confirm with the >> key.
- Select 'PCM2 code' in the PCM2-MMI coding menu and confirm with the >> key.
- Take PCM2 code from IPAS and enter with the arrow keys and code with F8 key.

- Porsche Assistance
international designation

- Porsche Assistance
international number

- Porsche Assistance
national designation

- Porsche Assistance
national number

- Summer/winter time Using this menu item, you can code the PCM2 according to summer/winter time:
- Connect and start the Porsche System Tester II No. 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 module menu 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 function selection menu and confirm with the >> key.
- Select "Summer/winter time" with the Down arrow key in the PCM2-MMI function selection menu and confirm with the >> key.
- Code relevant selection with the F8 key.

- Timeout

- Traffic information
volume boost Using this menu item, you can code the volume boost of the traffic announcement in the PCM2.
- Connect and start the Porsche System Tester II No. 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 module menu and confirm with the >> key.
- Select 'PCM2-MMI' in the 911 Turbo (996) PCM2 function selection menu and confirm with the >> key.
- Select 'Coding' in the PCM2-MMI function selection menu and confirm with the >> key.
- Select 'Traffic announcement volume boost' in the PCM2-MMI coding menu with the Down arrow key and confirm with the >> key.
- Code relevant selection with the F8 key.

- Time Using this menu item, you can code the present time.
- Connect and start the Porsche System Tester II No. 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 module selection menu and confirm with the >> key.
- Select 'PCM2-MMI' in the 911 Turbo (996) PCM2 function selection menu and confirm with the >> key.
- Select 'Coding' in the PCM2-MMI function selection menu and confirm with the >> key.
- Select 'Time' in the PCM2-MMI coding menu and confirm with the >> key.
- Select the relevant 'time' with the arrow keys Down arrow, <, >, Up arrow and code with the F8 key.

- Time zone Using this menu item, you can code the relevant time zone.
- Connect and start the Porsche System Tester II No. 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 module selection menu and confirm with the >> key.
- Select 'PCM2 MMI' in the 911 Turbo (996) PCM2 function selection menu and confirm with the >> key.
- Select 'Coding' in the PCM2-MMI function selection menu and confirm with the >> key.
- Select "Time zone" in the PCM2-MMI coding menu and confirm with the >> key.
- Select the 'Time zone' that corresponds to the country of admission with the > key and code 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 coded, 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 made.

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 electrically/optically checked at regular intervals during communication with the control modules via the MOST.

Extended Fault Memory
This menu item allows additional data to be read out of the PCM2-MMI:
- Tuner communication fault
- Distribution breakage, set according to timeout
- HF error
- PIL lock error
- General communication fault
- Further faults
- Short circuit to ground
- Open circuit
- B+ short circuit
- InstID of first faulty diagnosis of F block
- 2. Distribution breakage
- 1. Distribution breakage
- optically ok
- electrically ok
- key code
- Diagnosis InstID of the unit
- File cannot be read by CD
- Communication fault
- Flash erase fault
- Flash programming fault
- Signature fault
- Frequency fault
- First occurrence (month, day)
- First occurrence temperature
- First occurrence speed
- First occurrence supply voltage
- First occurrence hourmeter
- Last occurrence (month, day)
- Last occurrence temperature
- Last occurrence speed
- Last occurrence supply voltage
- Last occurrence hourmeter

1. Connect and start the Porsche System Tester II No. 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. The message "diagnosis software number; parts number PCM2" appears on the display
7. By pressing the F8 key, the respective 'Extended identification' is displayed.

NOTE: Deactivate the 'automatic traffic announcement' before performing the diagnosis on the PCM2. If this is not done, the diagnosis will abort.

Extended Identification
This menu item allows the following data to be read out of the PCM2-MMI:
- CRIN (Car Radio Identification Number)
- VIN (Vehicle Identification Number)
- Vehicle manufacturer ECU hardware number
- System supplier ECU hardware number (cw/year)
- System supplier ECU hardware version no.
- System supplier ECU software no. (cw/year)
- System supplier ECU software version no.
- Porsche workshop number
- Diagnosis software number
- Date ECU manufacturing (YYY.MM.DD)

1. Connect and start Porsche System Tester II No. 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. The message "Diagnosis software number; parts number PCM2" appears on the display.
7. By pressing the F8 key, the respective 'extended identification' is displayed.

NOTE: Deactivate the 'automatic traffic announcement' before performing the diagnosis on the PCM2. If this is not done, the diagnosis will abort.

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