Cayenne Turbo (9PA) V8-4.8L Turbo (2008)
Terminating Resistors on the CAN
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.
Tuner
Tuner
The optional tuner is part of the PCM2 (installed on the main board).
Unlock Counter
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.
Vehicle Hand-Over
Vehicle Hand-Over
The PCM2 is converted into production mode (low-current mode) in production. As known from other systems (alarm system, instrument cluster,
roll-over bar), the PCM2 must be activated with the Porsche System Tester II No. 9588.
1. Connect and start the Porsche System Tester II No. 9588 and switch on the ignition.
2. Select 'Special functions' in the Vehicle type menu and confirm with the >> key
3. Select 'Vehicle hand-over' in the Control modules menu and confirm with the >> key
4. Follow the instructions of the Porsche System Tester II No. 9588.
Voice Control System (VOCS)
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.
Wake-Up Function
Wake-Up Function
In an idle state, all control modules that are connected to the PCM2 are in sleep mode. When the PCM2 is switched on, 'the light' is switched on via the
Gateway. It is reinforced and passed on by the MOST control modules that are connected.
CAN Infotainment
CAN Infotainment
Communication between the 9588 Porsche System Tester II 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 Infotainment to the PCM2 gateway, via the electrical
MOST in the PCM2 and via the optical MOST outside of the PCM2.
CD Changer (CDC)
CD Changer (CDC)
The CDC is available as an optional feature and is linked to the PCM2 via the optical waveguide. On the PCB under the cover there is a glass fuse (3
amps); if the CD changer voltage supply fails, check this and replace if necessary.
CD Changer Actual Values
CD Changer Actual Values
It is possible to read out the sum of the following counters under the 'Actual values' menu item.
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MOST transmission error
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MOST unlock counter