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Steering Column Switch: Other Porsche Cayenne I

Steering Column Switches 5 illustrations ~1306 words

General instructions/safety instructions

WARNINGDanger of injury through triggering of driver's airbag 9588 Never hang the Porsche System Tester II over the steering wheel.
WARNINGObserve safety regulations when working on the airbag system, refer to 69 AW SAFETY REGULATIONS FOR HANDLING AIRBAGS AND... - AS OF MY 2003 (ALL MODELS) with air-bag and belt tensioner.
WARNINGDanger of injury and damage due to unusual vehicle handling when plugs or components are disconnected! Never disconnect plugs when the vehicle is in motion or drive the vehicle with plugs disconnected. Drive only with all parts fully installed and connected.
CAUTIONDanger of damage due to improper handling of batteries and control module plug connections! Never disconnect battery with engine running Never start engine if battery terminal clamps are not connected securely Never pull off or push on plug connections for the control modules or other electronic components when the ignition is switched on. Always disconnect the negative terminal of the battery and pull off all plug connections to the vehicle electrical system control module when carrying out welding work on the vehicle

The following points must be observed during vehicle diagnosis

  1. After the battery is connected, volatile memories must be reprogrammed. In the case of radio coding and tuning, the customer must be informed of decoding and the deleted tuner memory.
  2. After troubleshooting or repairs, erase the fault memory with the 9588 Porsche System Tester II and carry out a test drive.
  3. After the test drive, read out the fault memory with the 9588 Porsche System Tester II again.

Note. Important! Always connect a suitable battery charging device to the vehicle electrical system battery or to the designated jump-start terminal before starting diagnosis. All unnecessary loads must also be switched off.

Note. Visual inspection of plug connections: As part of troubleshooting, it must be ensured that the wiring side and component side of affected plug connections are neither damaged nor corroded. Furthermore, the wiring and plugs must be checked for external damage (cracks, etc.) and proper contact (pins not bent, spread or pushed into the housing). Repair damaged or corroded pins if possible, otherwise replace them. Repair or replace damaged wires. Visual inspection of components: As part of troubleshooting, it must be ensured that there are no signs of visible damage (e.g. cracks, deformation or chafed areas) on the affected components and wiring harnesses. This is particularly important for components that cannot be tested with a multimeter or components that can cause sporadic faults due to penetrating moisture.

Fault code setting conditions

Fault codes can be set in several circumstances, e.g.

  1. battery disconnected
  2. plug connections disconnected
  3. faulty coding
  4. power failure
  5. etc.

In these circumstances, no fault is present in the system and the fault memory must be erased.

Possible causes of fault

Note. The 'possible causes of fault' that are responsible for the fault are listed here. Please note that in certain circumstances further faults can be stored in the fault memory after troubleshooting (e.g. if plugs are disconnected). After carrying out repairs, read out the fault memory of all control modules and erase any faults.

Fault type

The following fault types are possible

  1. no display
  2. upper limit value exceeded
  3. lower limit value not reached
  4. mechanical fault
  5. no signal/communication
  6. no or incorrect basic setting/adaptation
  7. Short circuit to B+
  8. Short circuit to ground
  9. implausible signal
  10. open circuit/short circuit to ground
  11. open circuit/short circuit to B+
  12. Open circuit
  13. electrical fault in electric circuit
  14. please read out fault memory
  15. faulty
  16. cannot be checked now

Fault status

The following status types are possible

  1. present
  2. not present

This information should be saved using the Save key [F8] and printed out.

Note. Visual inspection: During troubleshooting, please check first that the affected pins on the steering column switch are neither damaged nor corroded. The wiring and plugs of the affected components must also be checked for external damage and correct contacts. Repair damaged or corroded pins if possible, otherwise replace affected pins. Repair or replace damaged wires.

Note. Battery voltage: A battery voltage of between 11.4 and 14.5 V is required for troubleshooting. This must be checked and provided if necessary. Voltages as well as components or fuses (input side) must be guaranteed on the vehicle electrical system.

Tools

WARNINGDanger of personal injury while driving with special tools Never hang the Porsche System Tester II No. 9588 over the steering wheel

Note. Plug contacts are optimally designed to suit the plug system. Operations on pins can cause contact problems. Always use suitable measurement tools such as adapter plugs and test cables. Required special tools, test and measuring equipment, plus auxiliary equipment ...!!!Commercially available battery charging device!!!...

Identifying Porsche System Tester II No. 9588. Scheme 253

Scheme 253: Identifying Porsche System Tester II No. 9588
Scheme 253: Identifying Porsche System Tester II No. 9588

Identifying Commercially Available Digital Multimeter. Scheme 254

Scheme 254: Identifying Commercially Available Digital Multimeter
Scheme 254: Identifying Commercially Available Digital Multimeter

Identifying Measurement Tool Set No. 9684. Scheme 255

Scheme 255: Identifying Measurement Tool Set No. 9684
Scheme 255: Identifying Measurement Tool Set No. 9684
Fig. 4: Identifying Component Arrangement Of Steering Column Switch
Scheme 4: Identifying Component Arrangement Of Steering Column Switch

Connector assignment

Wiring harness plug A, 16-pin (steering column switch with electronic unit)

Fig. 5: Identifying Connector Pins Of Wiring Harness Plug A (Steering Column Switch With Electronic Unit)
Scheme 5: Identifying Connector Pins Of Wiring Harness Plug A (Steering Column Switch With Electronic Unit)

Steering column switch (with electronic unit)

PinDesignationPinDesignation
1Terminal 312Terminal 30
3Not used4Not used
5Cruise control off6Not used
7Not used8CAN comfort (low)
9CAN comfort (high)10CAN drive (low)
11CAN drive (high)12Not used
13Terminal 1514Not used
15Not used16Not used

CONNECTOR PINS REFERENCE

Steering column switch (with electronic unit)

PinDesignationPinDesignation
1Steering column adjustment (ON/OFF switch)2Steering column adjustment (signal)
3Steering column adjustment (terminal 31)4Not used

CONNECTOR PINS REFERENCE

Possible cause of fault

  1. Steering column switch (with electronic unit) faulty
  1. No communication with electronic ignition switch

Affected pins

Steering column switch (with electronic unit), plug A

  1. Pin 8 'CAN comfort (low)'
  2. Pin 9 'CAN comfort (high)'
  1. No communication with vehicle electric system control module

Electronic unit in steering column switch plug A

  1. Pin 8 'CAN comfort (low)'
  2. Pin 9 'CAN comfort (high)'
  1. Lower limit value exceeded (battery positive voltage of vehicle battery is too low)
  2. Upper limit value exceeded (battery positive voltage of vehicle battery is too high)
  1. Steering column switch (with electronic unit), plug A: Pin 2
  2. Fuse in fuse carrier at left of dashboard: F33 (5A)
  1. Direction indicator permanently in switching position (mechanical fault)
  2. Electronic unit in steering column switch does not output any CAN message on the CAN comfort (faulty)

Electronic unit in steering column switch plug A

  1. Pin 8 'CAN comfort (low)'
  2. Pin 9 'CAN comfort (high)'
  1. In intermittent mode position, the wiper switch is permanently in switching position (mechanical fault)
  2. In intermittent-mode position, the wiper switch does not output any CAN message on the CAN comfort (fault)
  3. Electronic unit in direction indicator switch

Electronic unit in steering column switch plug A

  1. Pin 8 'CAN comfort (low)'
  2. Pin 9 'CAN comfort (high)'
  1. Short circuit in horn switch (short circuit to ground)

There is no internal wiring in the horn actuator and thus no pins.

  1. Switch in cruise control control unit permanently remains in preselected position (mechanical fault)
  2. No usable CAN message on the CAN bus (fault)

Electronic unit in steering column switch plug A

  1. Pin 8 'CAN comfort (low)'
  2. Pin 9 'CAN comfort (high)'
  3. Pin 10 'CAN drive (low)'
  4. Pin 11 'CAN drive (high)'
  1. Electronic unit in steering column switch has been replaced but not coded
  2. Electronic unit in steering column switch has not been correctly coded
  1. No signal from the instrument cluster (no signal/communication)

Steering column switch (with electronic unit), plug A

  1. Pin 8 'CAN comfort (low)'
  2. Pin 9 'CAN comfort (high)'
  3. Pin 10 'CAN drive (low)'
  4. Pin 11 'CAN drive (high)'
  1. No activation of the steering wheel heater (no signal/communication from the driver's memory seat adjustment control module)

Steering column switch (with electronic unit), plug A

  1. Pin 8 'CAN comfort (low)'
  2. Pin 9 'CAN comfort (high)'
  1. No CAN message on CAN comfort (no signal/communication)
  2. One or more control modules connected to CAN comfort are faulty (fault)

Steering column switch (with electronic unit), plug A

  1. Pin 8 'CAN comfort (low)'
  2. Pin 9 'CAN comfort (high)'
  1. No CAN message on CAN comfort and/or CAN drive (no signal/communication)

Steering column switch (with electronic unit), plug A

  1. Pin 8 'CAN comfort (low)'
  2. Pin 9 'CAN comfort (high)'
  3. Pin 10 'CAN drive (low)'
  4. Pin 11 'CAN drive (high)'
  1. No activation of steering wheel illumination (short circuit to ground)

Terminal 58d is internally wired and thus has no pins.

  1. Incorrect temperature signal. Steering wheel heating is switched off after a monitoring time has elapsed (implausible signal)
  2. No activation of steering wheel heating (open circuit/short circuit to B+)
  3. No activation of steering wheel heating (short circuit to ground)

The sensor for the heated steering wheel is internally wired and thus has no pins.

  1. Button or keys do not send any signal (short circuit to ground)
  2. Button or keys do not send any signal (open circuit/short circuit to B+)
  3. Keys do not send any valid signal (implausible signal)
  4. Button or keys do not function (fault)

Multi-function buttons in the steering wheel, left, are internally wired and thus have no pins.

  1. Keys do not function (fault)

Multi-function buttons in the steering wheel, right, are internally wired and thus have no pins.

  1. No activation of steering wheel heating (short circuit to ground)
  2. No activation of steering wheel heating (open circuit/short circuit to B+)

The heated steering wheel is internally wired and thus has no pins.

  1. Steering column adjustment switch remains in preselected position (mechanical fault)
  2. Steering column adjustment switch does not function (fault)

Electronic unit in steering column switch plug D

  1. Pin 1 'steering column adjustment (ON/OFF switch)'
  2. Pin 2 'Steering column adjustment (signal)'
  3. Pin 3 'steering column adjustment (terminal 31)'

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