Test Points - Parking Assist System

Fault, Fault code
Possible causes, elimination, notes

Test point 1
Outer right sensor faulty

Fault code 1

This fault is stored in the memory in the following cases:
1. Open circuit in supply lead to outer right sensor.
2. Short circuit to B+ in supply lead to outer right sensor.
3. Short circuit to ground in supply lead to outer right sensor.

Remedy:
Erase fault memory, move shift lever out of reverse gear and switch off ignition. Next, switch ignition back on, move shift lever into reverse and read out fault memory.
If the fault reappears, check the plug on the sensor for open circuit.
If no open circuit can be detected, check sensor plug, pin 1 to pin 4 and pin 1 to pin 2, for continuity using an ohmmeter. There should be no continuity.
If no short circuit can be detected, replace sensor.

Test point 2
Inner right sensor faulty

Fault code 2

This fault is stored in the memory in the following cases:
1. Open circuit in supply lead to inner right sensor.
2. Short circuit to B+ in supply lead to inner right sensor.
3. Short circuit to ground in supply lead to inner right sensor.

Remedy:
Erase fault memory, move shift lever out of reverse gear and switch off ignition. Next, switch ignition back on, move shift lever into reverse and read out fault memory.
If the fault reappears, check the plug on the sensor for open circuit.
If no open circuit can be detected, check sensor plug, pin 1 to pin 4 and pin 1 to pin 2, for continuity using an ohmmeter. There should be no continuity.
If no short circuit can be detected, replace sensor.

Test point 3
Inner left sensor faulty

Fault code 3

This fault is stored in the memory in the following cases:
1. Open circuit in supply lead to inner left sensor.
2. Short circuit to B+ in supply lead to inner left sensor.
3. Short circuit to ground in supply lead to inner left sensor.

Remedy:
Erase fault memory, move shift lever out of reverse gear and switch off ignition. Next, switch ignition back on, move shift lever into reverse and read out fault memory.
If the fault reappears, check the plug on the sensor for open circuit.
If no open circuit can be detected, check sensor plug, pin 1 to pin 4 and pin 1 to pin 2, for continuity using an ohmmeter. There should be no continuity.
If no short circuit can be detected, replace sensor.

Test point 4
Outer left sensor faulty

Fault code 4

This fault is stored in the memory in the following cases:
1. Open circuit in supply lead to outer left sensor.
2. Short circuit to B+ in supply lead to outer left sensor.
3. Short circuit to ground in supply lead to outer left sensor.

Remedy:
Erase fault memory, move shift lever out of reverse gear and switch off ignition. Next, switch ignition back on, move shift lever into reverse and read out fault memory.
If the fault reappears, check the plug on the sensor for open circuit.
If no open circuit can be detected, check sensor plug, pin 1 to pin 4 and pin 1 to pin 2, for continuity using an ohmmeter. There should be no continuity.
If no short circuit can be detected, replace sensor.

Test point 5
Control module supply voltage > 16.5 V or < 9 V

Fault code 5

This fault is stored in the memory in the following cases:
1. Low vehicle voltage.
2. If there is a fault in the generator.

Remedy:
Examine battery and generator voltages.
Select Control module supply voltage and Sensor supply voltage in the Actual values menu item, and check the values with the vehicle in reverse gear and the engine running.

Displayed control module supply voltage approx. 12 V
Displayed sensor supply voltage approx 8 V

Erase fault memory, move shift lever out of reverse gear and switch off ignition. Next, switch ignition back on, move shift lever into reverse and read out fault memory.

Test point 6
Control module supply voltage < 6.5 V

Fault code 6

This fault is stored in the memory in the following cases:
1. Low vehicle voltage.
2. If there is a short circuit in the supply leads.

Remedy:
Examine battery and alternator voltage.
Select Control module supply voltage and Sensor supply voltage in the Actual values menu item, and check the values with the vehicle in reverse gear and the ignition switched on.

Displayed control module supply voltage approx. 12 V
Displayed sensor supply voltage approx. 8 V

Pull off connector of number plate light and check the connector, pin 4 to pin 3, pin and sleeve side, for continuity.

Test point 7
Send/receive pulse

Fault code 7

This fault is stored in the memory in the following cases:
1. Low vehicle voltage.
2. If there is a short circuit in the supply leads.
3. Faulty sensor or faulty control module.

Remedy:
Examine battery and alternator voltage.
Select Control module supply voltage and Sensor supply voltage in the Actual values menu item, and check the values with the vehicle in reverse gear and the ignition switched on.

Displayed control module supply voltage approx. 12 V
Displayed sensor supply voltage approx. 8 V

Erase fault memory, move shift lever out of reverse gear and switch off ignition. Next, switch ignition back on, move shift lever into reverse and read out fault memory.
If the fault reappears and the display also shows that one or more sensors are faulty, replace the sensor or sensors.

Test point 8
EPROM key data defective or parameter set not programmed

Fault code 8

This fault is stored in the memory in the following cases:
1. The control module is faulty.
2. The control module is incorrectly programmed.

Remedy:
Erase fault memory, move shift lever out of reverse gear and switch off ignition. Next, switch ignition back on, move shift lever into reverse and read out fault memory.
If the fault appears again, replace the control module.

Test point 9
EPROM key data defective or parameter set incorrectly encoded

Fault code 9

This fault is stored in the memory in the following cases:
1. The control module is faulty.
2. The control module is incorrectly programmed.

Remedy:
Erase fault memory, move shift lever out of reverse gear and switch off ignition. Next, switch ignition back on, move shift lever into reverse and read out fault memory.
If the fault reappears, select the menu item Modify coding and check that the vehicle type is correctly encoded.
If the coding is correct, replace the control module.

Test point 10
Unknown fault code

Fault code 0

This fault is stored in the memory in the following case:
Corroded ground points

Remedy:
Inspect the ground points for corrosion.
Clear the fault memory.

Identification
The diagnosis software number and control module part number can be read out under the Identification menu item.

Fault memory
Stored faults can be read out under the Fault memory menu item.

Clear the fault memory
Faults stored in the control module can be erased under the Erase fault memory menu item. Here, all stored faults are erased.

Actual values
In the Actual values menu item, the current values of the following parameters can be read out.
- Control module supply voltage
- Sensor supply voltage
- Distance from outer right sensor
- Distance from inner right sensor
- Distance from inner left sensor
- Distance from outer left sensor
- Distance from right sensor pair
- Distance from left sensor pair

The distance from the obstacle to the sensor or sensor pair is measured and displayed in the Actual values menu item. This allows the function of the sensors to be checked.

Drive links
The function of the loudspeaker in the instrument cluster can be checked under the Drive links menu item. A continuous tone is emitted during this test.

Modifying the coding
The vehicle type Boxster or 911 Carrera (996) can be encoded under the Modify coding menu item.

Procedure:
1. Start the automatic control module search.
2. Select the Park Assistent control module.
3. Select menu item Modify coding.
4. Select vehicle type and press the F8 key.