Offroad Stabilizers Porsche Cayenne S I

Diagnosis software number for offroad stabilizers: 0101

Cayenne as of model year 2004

General instructions/safety instructions

In the following pages the 'offroad stabilizer control module' is also referred to as the 'ORS control module'.

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 Porsche System Tester II No. 9588 and carry out a test drive.
3. After the test drive, read out the fault memory with the Porsche System Tester II No. 9588 again.

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.

Troubleshooting procedure

Troubleshooting can only be performed when the fault is present. In other words, specific 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

1. Diagnosis conditions are met; if necessary perform a short test or test drive
2. All plug connections and ground points of the affected current path are OK.
3. 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 if the requirements listed under 'Diagnostic conditions' are met. For this reason, the specified procedure must be observed after a fault is repaired: Erase fault memory. Satisfy the requirements listed under 'Diagnostic conditions'. 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. if plugs are disconnected). After carrying out repairs, read out the fault memory of all control modules 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

1. upper limit value exceeded
2. lower limit value not reached
3. no signal/communication
4. Short circuit to B+
5. Short circuit to ground
6. implausible signal
7. open circuit/short circuit to ground
8. Open circuit
9. please read out fault memory
10. faulty

Fault status

The following status types are possible

1. present
2. 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 wiring harness plug connection 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 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.

Offroad stabilizer tools

Note. Plug contacts are optimally designed to suit the plug system. Operations on pins can cause contact problems. Always use suitable measurement tools for adapter plugs and test cables.

Scheme 95

Scheme 96

Scheme 97

Scheme 98

Scheme 99

Component arrangement 'item 3': Button for hydraulically disengageable off-road stabilizers

Scheme 100

Scheme 101

Offroad stabilizer control module connector A

CONNECTOR PINOUTS REFERENCE - OFFROAD STABILIZER CONTROL MODULE CONNECTOR A

Offroad stabilizer control module connector B

CONNECTOR PINOUTS REFERENCE - OFFROAD STABILIZER CONTROL MODULE CONNECTOR B

The off-road stabilizer control module includes the functions listed below

1. Computer identification
2. Computer configuration with ignition ON
3. Checking the fault memory for fault entries, even in diagnostic mode
4. Deleting the fault memory
5. Reading measured values from switches and sensors

Supported functions

1. Diagnosis software number
2. Drive link test with active fault checking

Basic setting

1. Initialisation
2. Read memory
3. Write memory
4. Update programme
5. Flash programme (end of volume)
6. Protected against unauthorised access

Commissioning

When the ignition 'terminal 15' is switched on, an internal function test (initialisation phase) is performed in the off-road stabilizer control module. When the internal function test is completed successfully, all functions integrated in the off-road stabilizer control module are released.

Operating condition

The off-road stabilizer control module is in operating mode once the ignition is switched on and the internal function test is completed successfully. Within the defined limits for power supply and temperature, all incoming signals are processed by the integrated software and the appropriate monitoring and control processes are performed.

Data transfer

The off-road stabilizer control module sends and receives data/ information via the following 'CAN data bus'

1. CAN drive (C)
2. Gateway (in instrument cluster)

Fault memory

Faults that occur during operation are stored in a non-volatile memory (e.g. EEPROM). The faults remain in memory even if no voltage is present at terminals 15 and 30. The fault memory is designed in such a way that the occurring faults, data source, fault type and fault deletion counter can be saved. The off-road stabilizer control module sends messages and checks the CAN drive cyclically for messages from other control modules. If no messages are received for a certain time period, a fault is stored in the fault memory.

Drive links

The following drive links can be selected individually in the Off-road stabilizers system using the 9588 Porsche System Tester II in the drive link test.

1. Set front-axle valve 'to depressurise front system'
2. Set rear-axle valve 'to depressurise rear system'
3. Switch on electric hydraulic pump 'to bleed the system'
4. Switch on front-axle valve 'to check the front system'
5. Switch on rear-axle valve 'to check the rear system'
6. Switch on front-axle and rear-axle valves in turn 'to completely disengage the system manually'

FAULT REVIEW FOR OFFROAD STABILIZERS

Troubleshooting with no control module connected

Note. The 9588 Porsche System Tester II and the 'off-road stabilizer control module' are not connected.

1. Ignition on
2. The fuses of the 'off-road stabilizer control module' are OK
3. The fuses of the 'gateway' in the instrument cluster are OK
4. Battery voltage is OK
5. Plug on 'off-road stabilizer control module' attached correctly

Possible cause of fault

1. Incorrect vehicle type selected in 9588 Porsche System Tester II
2. 9588 Porsche System Tester II is not connected correctly or is faulty
3. Power supply of 'off-road stabilizer control module' is not OK
4. 'Gateway' in instrument cluster does not function
5. 'CAN drive' does not function
6. 'Off-road stabilizer control module' does not function

Affected pins

Off-road stabilizer control module, plug A

1. Pin 1 'terminal 30 voltage (electric hydraulic pump) via fuse F14 in back-up fuse holder'

Off-road stabilizer control module, plug B

1. Pin 7 'terminal 15 voltage via fuse F49 in fuse carrier at left of dashboard'
2. Pin 22 'terminal 30 voltage via fuse F23 in fuse carrier at left of dashboard'
3. Pin 23 'ground for body ground point 41'
4. Pin 1 'CAN drive (high)'
5. Pin 3 'CAN drive (low)'

16-pin diagnostic box in driver's footwell

CONNECTOR PINOUTS REFERENCE

Scheme 102

Note. Visual inspection: In the next troubleshooting section, please check first that the affected 'pins' on the plug connections are neither damaged nor corroded. Remove any soiling or corrosion/oxidation and replace damaged parts/wires.

Note. Control unit replacement: Before replacing a control module, the ground connections, power supply and plug connections on the control module must be checked. After the test drive, read out the fault memory again with the 9588 Porsche System Tester II. Additional causes of faults that could damage the control module should be detected and remedied.

TROUBLESHOOTING CHART

1. Ignition on
2. Internal offroad stabilizer control module function test

1. Defective offroad stabilizer control module

DIAGNOSIS/TROUBLESHOOTING CHART

1. Ignition on
2. Internal offroad stabilizer control module function test

1. No signal/communication (no signal from KESSY control module on CAN drive)

Offroad stabilizer control module connector B

1. Pin 1 'CAN drive (high)'
2. Pin 3 'CAN drive (low)'

Note. If there is no incoming signal via the CAN drive using several control modules, the CAN drive must be checked for open or short circuits. Refer to ' CHECKING INSTRUCTIONS/CAN DATA BUS '.

DIAGNOSIS/TROUBLESHOOTING CHART

1. Internal offroad stabilizer control module function test
2. Ignition off

1. Short circuit to B+
2. Short circuit to ground
3. Open circuit in wiring
4. Fuse 'F49' (5A) in fuse carrier at left of dashboard faulty
5. Relay for terminal 15 under driver's seat faulty
6. ORS control module faulty

Offroad stabilizer control module connector B

1. Pin 7 'terminal 15'

Note. Visual inspection: In the next troubleshooting section, please check first that the affected pins on the ORS control module plug connection 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. Sporadic faults: In the event of faults that occur sporadically, the wiring positions that are linked to moving parts on and in the vehicle must be checked for each system. Various statuses that can cause faults must be simulated with the help of the wiring diagram.

DIAGNOSIS/TROUBLESHOOTING CHART

1. Ignition on
2. Internal function test on off-road stabilizer (ORS) control module

1. No or not enough pressure is built up although the hydraulic pump is running
2. Hydraulic pump does not start
3. Hydraulic/mechanical fault

ORS control module, plug A

1. Pin 2 'pump motor +'

DIAGNOSIS/TROUBLESHOOTING CHART

1. Ignition on
2. Internal offroad stabilizer control module function test

1. Upper limit value exceeded (battery positive voltage too high)
2. Lower limit value not reached (battery voltage too low)
3. Fuse 'F23' (10A) in fuse carrier at left of dashboard faulty

ORS control module, plug B

1. Pin 22 'terminal 30'

Fuse in fuse carrier at left of dashboard: 'F23' (10A)

DIAGNOSIS/TROUBLESHOOTING CHART

1. Internal function test on off-road stabilizer (ORS) control module

1. No or incorrect basic setting (no coding written in off-road stabilizer control module)

Note. This fault code is only issued if a new, 'uncoded' control module was installed, which does not yet contain any coding.

DIAGNOSIS/TROUBLESHOOTING CHART

1. Ignition on
2. Internal offroad stabilizer control module function test

Communication problem with all control modules via CAN drive.

1. Short circuit to ground
2. Short circuit to B+
3. Break in wiring harness

Offroad stabilizer control module connector B

1. Pin 1 'CAN drive (high)'
2. Pin 3 'CAN drive (low)'

DIAGNOSIS/TROUBLESHOOTING CHART

1. Ignition on
2. Internal offroad stabilizer control module function test

1. No signal/communication (no signal from PSM control module on CAN drive)
2. Faulty PSM control module
3. Read out PSM control module fault memory

Offroad stabilizer control module connector B

1. Pin 1 'CAN drive (high)'
2. Pin 3 'CAN drive (low)'

DIAGNOSIS/TROUBLESHOOTING CHART

1. Ignition on
2. Internal offroad stabilizer control module function test

1. No signal/communication (no signal from transfer box control module on CAN drive)
2. Read out fault memory in transfer box control module

Offroad stabilizer control module connector B

1. Pin 1 'CAN drive (high)'
2. Pin 3 'CAN drive (low)'

DIAGNOSIS/TROUBLESHOOTING CHART

1. Ignition on
2. Internal function test on offroad stabilizer (ORS) control unit

1. Short circuit to B+
2. Short circuit to ground
3. Open circuit in wiring
4. Implausible signal

Offroad stabilizer control unit, connector B

1. Pin 2 'front-axle sensor +'
2. Pin 3 'front-axle sensor -'

DIAGNOSIS/TROUBLESHOOTING CHART

1. Ignition on
2. Internal function test on offroad stabilizer (ORS) control unit

1. Short circuit to B+
2. Short circuit to ground
3. Open circuit in wiring
4. Implausible signal

Offroad stabilizer control unit, connector B

1. Pin 4 'rear-axle sensor +'
2. Pin 8 'rear-axle sensor -'

DIAGNOSIS/TROUBLESHOOTING CHART

1. Ignition on
2. Internal function test on off-road stabilizer (ORS) control module

1. Short circuit to B+
2. Short circuit to ground
3. Open circuit in wiring
4. Pressure sensor faulty

Off-road stabilizer control module, plug B

1. Pin 10 'pressure sensor -' for hydraulic unit plug B pin 10 'pressure sensor -'
2. Pin 11 'pressure sensor signal' for hydraulic unit plug B pin 7 'pressure sensor signal'
3. Pin 18 'pressure sensor +' for hydraulic unit plug B pin 3 'pressure sensor +'

Scheme 103

[bar]- Pressure

[V] - Voltage

DIAGNOSIS/TROUBLESHOOTING CHART

Fault code 2551

Note. This fault code is entered when the button is actuated for more than 30 seconds.

1. Ignition on
2. Internal function test on off-road stabilizer (ORS) control module

1. Implausible signal

Off-road stabilizer control module, plug B

1. Pin 12 'button'

DIAGNOSIS/TROUBLESHOOTING CHART

1. Ignition on
2. Internal function test on off-road stabillizer (ORS) control module

1. Short circuit to B+
2. Short circuit to ground
3. Open circuit in wiring

Off-road stabilizer control module, plug B

1. Pin 13 'LED-'

DIAGNOSIS/TROUBLESHOOTING CHART

1. Ignition on
2. Internal offroad stabilizer control module function test

1. Short circuit to B+
2. Short circuit to ground
3. Open circuit in wiring
4. Implausible signal

Offroad stabilizer control module connector B

1. Pin 17 'VA valve -' to hydraulic unit plug A pin 6 'valve -'
2. Pin 20 'VA valve +' to hydraulic unit plug A pin 5 'valve +'

DIAGNOSIS/TROUBLESHOOTING CHART

1. Ignition on
2. Internal offroad stabilizer control module function test

1. Short circuit to B+
2. Short circuit to ground
3. Open circuit in wiring
4. Implausible signal

Offroad stabilizer control module connector B

1. Pin 16 'HA valve -' to hydraulic unit plug A pin 2 'HA valve -'
2. Pin 19 'HA valve +' to hydraulic unit plug A pin 1 'HA valve +'

DIAGNOSIS/TROUBLESHOOTING CHART

1. Ignition on
2. Internal offroad stabilizer control module function test

1. Short circuit to ground
2. Open circuit in wiring
3. el. hydraulic pump faulty

Offroad stabilizer control module connector A

1. Pin 2 'Pump motor +' to hydraulic unit plug A pin 3 'Pump motor +'

DIAGNOSIS/TROUBLESHOOTING CHART

1. Ignition on
2. Internal function test on off-road stabilizer (ORS) control module

1. Open circuit in wiring

Off-road stabilizer control module, plug A

1. Pin 1 'terminal 30'
2. Pin 2 'pump motor +'

DIAGNOSIS/TROUBLESHOOTING CHART

Poses Online

See also:
• CODING THE CONTROL UNIT FOR OFF-ROAD STABILIZER
• 0003
• 2551