Locks: Application and ID
Rear/door convenience systemIntroduction
Rear convenience system control unit
Rear convenience system diagnosis software number: 0101
Cayenne model year 2003
General instructions/safety instructions
The following points must be observed during vehicle diagnosis:
- 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.
- After troubleshooting or repairs, erase the fault memory with the Porsche System Tester II No.9588 and carry out a test drive.
- After the test drive, read out the fault memory with the Porsche System Tester II No.9588 again.
DANGER:
Danger of injury through triggering of driver's airbag
- Never hang the Porsche System Tester II No.9588 over the steering wheel.
WARNING:
Danger of injury and damage due to unusual vehicle handling when plugs or components are disconnected.
- Never disconnect/connect plugs when the vehicle is in motion or drive the vehicle with plugs disconnected.
- Drive only with all components fully installed and connected.
WARNING:
Danger of personal injury from lowering vehicle independently when working on and underneath the vehicle.
WARNING:
Danger of personal injury from moving vehicle independently with gear engaged and engine running.
- Before starting the engine in a vehicle with manual trans- mission, take the vehicle out of gear and put the hand brake on firmly
- Before starting the engine in a vehicle with automatic transmission, move the selector lever to position 'P' and put the handbrake on firmly.
CAUTION:
Danger of injury and material damage if the wheel carrier is raised incorrectly.
- Do not raise the wheel suspension higher than the normal vehicle position (vehicle resting on wheels). When raising, use a suitable intermediate layer (hard rubber).
- Do not damage the brake cover plate or brake hoses.
CAUTION:
Danger of damage due to improper handling of batteries and control unit 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 units 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 unit when carrying out welding work on the vehicle
Fault code setting conditions
Fault codes can be set in several circumstances, e.g.:
- When disconnecting battery
- When disconnecting plug connections
- If coding faulty
- In event of power failure
- etc.
In these circumstances, no fault is present in the system and the fault memory must be erased.
Troubleshooting procedure
Specific troubleshooting is only possible if the fault is actually present. In other words, troubleshooting can only be performed in accordance with instructions (given under Diagnosis/troubleshooting for each fault code) if the entry has the status 'present' in the fault memory.
If the fault is currently 'not present', please check the following:
- The diagnosis conditions are met; if necessary perform a short test or test drive.
- All plug connections and ground points of the affected current path are OK.
- Set all wiring harnesses of the affected current path to a state that corresponds to driving by pulling and shaking them (loose contact)
Diagnostic conditions
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:
The fault can only be identified it the requirements listed under Diagnostic conditions are met For this reason, the specified procedure must be observed after a fault is repaired:
1. Clear fault memory.
2. Satisfy the requirements listed under 'Diagnostic conditions'.
3. Perform a short system test and carry out a test drive.
4. Read out fault memory again
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. it plugs are disconnected). After carrying out repairs, read out the fault memory of all control units and erase any faults.
Diagnosis/troubleshooting
NOTE: The fault memory Info key [F8] on Porsche System Tester II No.9588 can be used to access the extended fault memory. The following information can be displayed:
Fault type
The following fault types are possible:
- No display
- Above upper limit
- Below lower limit
- Mechanical fault
- No signal/communication
- No or incorrect basic setting/adaptation
- Short circuit to B+
- Short circuit to ground
- Implausible signal
- open circuit/short circuit to ground
- open circuit/short circuit to B+
- Open circuit
- Electrical fault in electric circuit
- Please read out fault memory
- Faulty
- Cannot be checked now
Fault status
The following status types are possible:
- 'Present'
- 'Not present'
This information should be saved using the Save key [F4] and printed out.
NOTE:
Visual inspection: During troubleshooting, please check first that the affected pins on the rear convenience system control unit plug connection are neither damaged nor corroded. The wiring and plugs of the affected components must also be checked for external damage and proper contact. Repair damaged or corroded pins it possible, otherwise replace affected pins. Repair or replace damaged wires.
NOTE:
Battery voltage and signals: A battery voltage of between 11.4 and 14.5 V is required for troubleshooting. This must be checked and provided if necessary. Both signals and voltages as well as components or fuses (input side) must be guaranteed on the vehicle electrical system.
NOTE: Specified resistance values are based on an ambient temperature of 20 °C.