Troubleshooting procedure
If the fault is currently 'not present', please check the following
- Diagnostic conditions are met
- 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.
Diagnostic conditions
Note. Important! Always connect a suitable battery charging device to the vehicle electrical system battery 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
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
- Ignition on
- Internal function test
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Replace ParkAssist control unit | > End | |
DIAGNOSIS/TROUBLESHOOTING CHART
- Ignition on
- ParkAssist control unit internal function test
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Correctly code ParkAssist control unit | > End | |
DIAGNOSIS/TROUBLESHOOTING CHART
- Ignition on
- ParkAssist control unit internal function test
- Selector lever position in transmission range R or N
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check voltage supply line | Ignition off Pull off plug for display field (LED segments) Ignition on Selector lever position in transmission range R or N Measure voltage between pin 1 of display field plug and ground (vehicle) | 11.4...14.5V Go to Step 2 | Repair line or line connection --> End |
| 2 | Check ground connection for display field (LED segments) | Measure resistance between pin 2 of display field plug and ground (vehicle) | < 5 ohms Go to Step 3 | Repair line or line connection --> End |
| 3 | Check signal line for short circuit to B+ | Switch off ignition Measure voltage between pin 3 of display field plug and ground (vehicle) | < 0.3 V Go to Step 4 | Repair line or line connection --> End |
| 4 | Check signal line for short circuit to ground (vehicle) | Measure resistance between pin 3 of display field plug and ground (vehicle) | Infinity ohms Go to Step 5 | Repair line or line connection --> End |
| 5 | Check signal lead for open circuit | Measure resistance between pin 3 of plug for display field and pin 6 of plug A for ParkAssist control unit | < 5 ohms Go to Step 6 | Repair line or line connection --> End |
| 6 | Replace display field (LED segments) | > End | Go to Step 7 | |
| 7 | Replace ParkAssist control unit | > End | ||
DIAGNOSIS/TROUBLESHOOTING CHART
- Ignition on
- ParkAssist control unit internal function test
- Selector lever position in transmission range R or N
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check supply voltage | Ignition off Pull off plug for display field (LED segments) Ignition on Measure voltage between pin 1 of display field plug and ground (vehicle) | 11.4...14.5V Go to Step 2 | Repair line or line connection --> End |
| 2 | Check ground connection for display field (LED segments) | Measure resistance between pin 2 of display field plug and ground (vehicle) | < 5 ohms Go to Step 3 | Repair line or line connection --> End |
| 3 | Check signal line for short circuit to B+ | Switch off ignition Measure voltage between pin 3 of display field plug and ground (vehicle) | < 0.3V Go to Step 4 | Repair line or line connection --> End |
| 4 | Check signal line for short circuit to ground | Measure resistance between pin 3 of display field plug and ground (vehicle) | Infinity ohms Go to Step 5 | Repair line or line connection --> End |
| 5 | Check signal line for open circuit | Measure resistance between pin 3 of plug for display field and pin 6 of plug A for ParkAssist control unit | < 5 ohms Go to Step 6 | Repair line or line connection --> End |
| 6 | Replace display field (LED segments) | > End | Go to Step 7 | |
| 7 | Replace ParkAssist control unit | > End | ||
DIAGNOSIS/TROUBLESHOOTING CHART
- Ignition on
- ParkAssist control unit internal function test
- Selector lever position in transmission range R or N
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check voltage supply line | Ignition off Pull off plug for display field (LED segments) Ignition on Check supply voltage: Measure voltage between pin 1 of display field plug and ground (vehicle) | 11.4...14.5V Go to Step 2 | Repair line or line connection --> End |
| 2 | Check ground connection for display field (LED segments) | Check ground connection: Measure resistance between pin 2 of display field plug and ground (vehicle) | < 5 ohms Go to Step 3 | Repair line or line connection --> End |
| 3 | Check signal line for short circuit to B+ | Switch off ignition Measure voltage between pin 3 of display field plug and ground (vehicle) | < 0.3 V Go to Step 4 | Repair line or line connection --> End |
| 4 | Check signal line for short circuit to ground | Measure resistance between pin 3 of display field plug and ground (vehicle) | Infinity ohms Go to Step 5 | Repair line or line connection --> End |
| 5 | Check signal line for open circuit | Measure resistance between pin 3 of plug for display field and pin 6 of plug A for ParkAssist control unit | < 5 ohms Go to Step 6 | Repair line or line connection --> End |
| 6 | Replace display field (LED segments) | > End | Go to Step 7 | |
| 7 | Replace ParkAssist control unit | > End | ||
DIAGNOSIS/TROUBLESHOOTING CHART
- Ignition on
- ParkAssist control unit internal function test
- Selector lever position in transmission range R or N
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check display supply voltage | Switch off ignition Pull plug off display field Switch on ignition Measure voltage between pin 1 of display field plug and vehicle ground | 11.4...14.5 V Go to Step 2 | Repair wire or replace wiring harness --> End |
| 2 | Check ground supply line | Measure resistance between pin 2 of display field plug and ground (vehicle) | < 5 ohms Go to Step 3 | Repair wire or replace wiring harness --> End |
| 3 | Check buzzer supply voltage | Measure voltage between pin 1 of buzzer plug and vehicle ground | 11.4...14.5 V Go to Step 4 | Repair wire or replace wiring harness --> End |
| 4 | Check supply lines for open circuit between control unit plug and plug for display fields (LED segments) or buzzer | Switch off ignition Pull plug A off ParkAssist control unit Measure resistance of connecting leads from plug for control unit to plug for display field or buzzer: Pin 6 and pin 3 Pin 5 and pin 1 Pin 9 and pin 1 (buzzer) | < 5 ohms Go to Step 5 | Repair wire or replace wiring harness --> End |
| 5 | Check supply lines for short circuit to ground between plug for control unit and plug for display fields (LED segments) or buzzer | Measure resistance to ground (vehicle) of display field plug or buzzer plug lines: Pin 5 or pin 1 Pin 9 or pin 1 (buzzer) | Infinity ohms Go to Step 6 | Repair wire or replace wiring harness --> End |
| 6 | Replace ParkAssist control unit | > End | ||
DIAGNOSIS/TROUBLESHOOTING CHART
- Ignition on
- ParkAssist control unit internal function test
- Selector lever position in transmission range R or N
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check switch (button) | Using the Porsche System Tester II No. 9588, check switch function | Erase fault memory --> End | Go to Step 2 |
| 2 | Check switch (button) with multimeter | Switch off ignition Pull off plug for telematics/ParkAssist switch in roof console Measure resistance at the switch module between pins 2 and 3 | Switch (button) not pressed: infinity ohms Switch (button) pressed: < 5 ohms. | Replace switch (button) or roof console --> End |
| 3 | Check ground supply line of roof console switch | Measure resistance between pin 3 of plug for telematics/ParkAssist roof console and ground (vehicle) | < 5 ohms Go to Step 4 | Repair wire or replace wiring harness --> End |
| 4 | Check signal line of switch (button) for short circuit to ground | Switch off ignition Pull plug off ParkAssist control unit Measure resistance between pin 14 of plug A for ParkAssist control unit and ground (vehicle) | Infinity ohms Go to Step 5 | Repair wire or replace wiring harness --> End |
| 5 | Check signal line of switch (button) for open circuit | Measure resistance between pin 14 of plug A for ParkAssist control unit and pin 2 of plug for telematics/ParkAssist switch in roof console | < 5 ohms Go to Step 6 | Repair wire or replace wiring harness --> End |
| 6 | Replace ParkAssist control unit | > End | ||
DIAGNOSIS/TROUBLESHOOTING CHART
- Ignition on
- Selector lever position in transmission range R or N
- ParkAssist control unit internal function test
- Vehicle speed briefly greater than 14 km/h
Note. If the above environmental conditions can be eliminated as a cause and the fault has the status "present", troubleshooting must be performed.
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Visual inspection | Check sensor for heavy external soiling or damage Check the sensor plug for damage and corrosion | Go to Step 2 | Remove dirt from sensor and replace, or repair sensor plug --> End |
| 2 | Perform drive link test for sensor(s) | Using Porsche System Tester II No. 9588 perform drive link test for sensors | Test drive to check fault cleared --> End | Go to Step 3 |
| 3 | Check supply voltage for sensor(s), see also FAULT CODE 1549 for sensor supply voltage | Switch off ignition Pull plug off sensor Switch on ignition Selector lever position in transmission range R or N Measure voltage between pin 1 of sensor plug and vehicle ground | Approx. 8.5 V Go to Step 4 | Repair wire or replace wiring harness Go to Step 7 |
| 4 | Check ground line of sensor | Measure voltage between pin 1 and pin 3 of sensor plug | Approx. 8.5 V Go to Step 5 | Repair wire or replace wiring harness --> End |
| 5 | Check signal line of sensor for short to ground | Switch off ignition Pull plug off ParkAssist control unit Measure resistance between pin 5 of plug B for ParkAssist control unit and ground (vehicle) | Infinity ohms Go to Step 6 | Repair wire or replace wiring harness --> End |
| 6 | Check signal line of sensor for short to B+ | Switch on ignition Measure voltage between pin 5 of plug B for ParkAssist control unit and ground (vehicle) | < 0.3 V Go to Step 7 | Repair wire or replace wiring harness --> End |
| 7 | Check signal line of sensor for open circuit | Measure resistance between pin 5 of plug B for ParkAssist control unit and pin 2 of sensor plug | < 5 ohms Go to Step 8 | Repair wire or replace wiring harness --> End |
| 8 | Replace sensor | > End | Go to Step 9 | |
| 9 | Replace control unit ParkAssist | > End | ||
DIAGNOSIS/TROUBLESHOOTING CHART
- Ignition on
- Selector lever position in transmission range R or N
- ParkAssist control unit internal function test
- Vehicle speed briefly greater than 14 km/h
Note. If the above environmental conditions can be eliminated as a cause and the fault has the status "present", troubleshooting must be performed.
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Visual inspection | Check sensor for heavy external soiling or damage Check the sensor plug for damage and corrosion | Go to Step 2 | Remove dirt from sensor and replace, or repair sensor plug --> End |
| 2 | Perform drive link test for sensor | Using Porsche System Tester II No. 9588 perform drive link test for sensors | Test drive to check fault cleared --> End | Go to Step 3 |
| 3 | Check supply voltage for sensor, see also FAULT CODE 1549 for sensor supply voltage | Switch off ignition Pull plug off sensor Switch on ignition Selector lever position in transmission range R or N Measure voltage between pin 1 of sensor plug and vehicle ground | Approx. 8.5 V Go to Step 4 | Repair wire or replace wiring harness --> End |
| 4 | Check ground line of sensor | Measure voltage between pin 1 and pin 3 of sensor plug | Approx. 8.5 V Go to Step 5 | Repair wire or replace wiring harness --> End |
| 5 | Check signal line of sensor for short to ground | Switch off ignition Pull plug off ParkAssist control unit Measure resistance between pin 6 of plug B for ParkAssist control unit and ground (vehicle) | Infinity ohms Go to Step 6 | Repair wire or replace wiring harness --> End |
| 6 | Check signal line of sensor for short to B+ | Switch on ignition Measure voltage between pin 6 of plug B for ParkAssist control unit and ground (vehicle) | < 0.3 V Go to Step 7 | Repair wire or replace wiring harness --> End |
| 7 | Check signal line of sensor for open circuit | Measure resistance between pin 6 of plug B for ParkAssist control unit and pin 2 of sensor plug | < 5 ohms Go to Step 8 | Repair wire or replace wiring harness --> End |
| 8 | Replace sensor | > End | Go to Step 9 | |
| 9 | Replace control unit ParkAssist | > End | ||
DIAGNOSIS/TROUBLESHOOTING CHART
- Ignition on
- Selector lever position in transmission range R or N
- ParkAssist control unit internal function test
- Vehicle speed briefly greater than 14 km/h
Note. If the above environmental conditions can be eliminated as a cause and the fault has the status "present", troubleshooting must be performed.
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Visual inspection | Check sensor 10 for heavy external soiling or damage Check the sensor plug for damage and corrosion | Go to Step 2 | Remove dirt from sensor and replace, or repair sensor plug --> End |
| 2 | Perform drive link test for sensor | Using 9588 Porsche System Tester II perform drive link test for corresponding sensors | Test drive to check fault cleared --> End | Go to Step 3 |
| 3 | Check supply voltage for sensor, see also FAULT CODE 1549 for sensor supply voltage | Switch off ignition Pull plug off sensor Switch on ignition Selector lever position in transmission range R or N Measure voltage between pin 1 of the sensor plug and ground (vehicle) | Approx. 8.5 V Go to Step 4 | Repair wire or replace wiring harness --> End |
| 4 | Check ground lead of the sensor | Measure voltage between pin 1 and pin 3 of sensor plug | Approx. 8.5 V Go to Step 5 | Repair wire or replace wiring harness --> End |
| 5 | Check signal line of sensor for short to ground | Switch off ignition Pull plug off ParkAssist control unit Measure resistance between pin 14 of plug B for ParkAssist control unit and ground (vehicle) | Infinity ohms Go to Step 6 | Repair wire or replace wiring harness --> End |
| 6 | Check signal line of sensor for short to B+ | Switch on ignition Measure voltage between pin 14 of plug B for ParkAssist control unit and ground (vehicle) | < 0.3 V Go to Step 7 | Repair wire or replace wiring harness --> End |
| 7 | Check signal lead of the sensor for open circuit | Measure resistance between pin 14 of plug B for ParkAssist control unit and pin 2 of sensor plug | < 5 ohms Go to Step 8 | Repair wire or replace wiring harness --> End |
| 8 | Replace sensor | > End | Go to Step 9 | |
| 9 | Replace control module for ParkAssist | > End | ||
DIAGNOSIS/TROUBLESHOOTING CHART
- Ignition on
- Selector lever position in transmission range R or N
- ParkAssist control unit internal function test
- Vehicle speed briefly greater than 14 km/h
Note. If the above environmental conditions can be eliminated as a cause and the fault has the status "present", troubleshooting must be performed.
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Visual inspection | Check sensor 9 for heavy external soiling or damage Check the sensor plug for damage and corrosion | Go to Step 2 | Remove dirt from sensor and replace, or repair sensor plug --> End |
| 2 | Perform drive link test for sensor | Using 9588 Porsche System Tester II perform drive link test for corresponding sensors | Test drive to check fault cleared --> End | Go to Step 3 |
| 3 | Check supply voltage for sensor, see also FAULT CODE 1549 for sensor supply voltage | Switch off ignition Pull plug off sensor Switch on ignition Selector lever position in transmission range R or N Measure voltage between pin 1 of the sensor plug and ground (vehicle) | Approx. 8.5 V Go to Step 4 | Repair wire or replace wiring harness --> End |
| 4 | Check ground lead of the sensor | Measure voltage between pin 1 and pin 3 of sensor plug | Approx. 8.5 V Go to Step 5 | Repair wire or replace wiring harness --> End |
| 5 | Check signal line of sensor for short to ground | Switch off ignition Pull plug off ParkAssist control unit Measure resistance between pin 13 of plug B for ParkAssist control unit and ground (vehicle) | Infinity ohms Go to Step 6 | Repair wire or replace wiring harness --> End |
| 6 | Check signal line of sensor for short to B+ | Switch on ignition Measure voltage between pin 13 of plug B for ParkAssist control unit and ground (vehicle) | < 0.3 V Go to Step 7 | Repair wire or replace wiring harness --> End |
| 7 | Check signal lead of the sensor for open circuit | Measure resistance between pin 13 of plug B for ParkAssist control unit and pin 2 of sensor plug | < 5 ohms Go to Step 8 | Repair wire or replace wiring harness --> End |
| 8 | Replace sensor | > End | Go to Step 9 | |
| 9 | Replace control module for ParkAssist | > End | ||
DIAGNOSIS/TROUBLESHOOTING CHART
- Ignition on
- ParkAssist control unit internal function test
- Selector lever position in transmission range R or N
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Continue troubleshooting, refer to CHECKING INSTRUCTIONS/CAN DATA BUS . | > End | |
DIAGNOSIS/TROUBLESHOOTING CHART
- ParkAssist control unit internal function test
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Check fault type using [F8] | 'no signal/communication' Go to Step 2 'please read out fault memory' Go to Step 3 | |
| 2 | Check fault memory in the ParkAssist control unit for further faults | Further faults present => Correct the faults according to instructions | Go to Step 3 |
| 3 | Read out fault memory in vehicle electrical system control unit | Further faults present => Correct the faults according to instructions | Go to Step 4 |
| 4 | Continue troubleshooting, refer to CHECKING INSTRUCTIONS/CAN DATA BUS . | > End | |
DIAGNOSIS/TROUBLESHOOTING CHART
- Ignition on
- ParkAssist control unit internal function test
- Internal function test on instrument cluster and gateway
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Read out instrument cluster/gateway fault memory | Go to Step 2 | |
| 2 | Code instrument cluster/gateway correctly | > End | |
DIAGNOSIS/TROUBLESHOOTING CHART
- Ignition switched on
- ParkAssist control unit internal function test
Note. If there is no incoming signal via CAN Infotainment using several control units, CAN Infotainment must be checked for open or short circuits. Refer to ' CHECKING INSTRUCTIONS/CAN DATA BUS '.
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Check fault memory in gateway for faults | Further faults present => Correct the faults | Go to Step 2 |
| 2 | Continue troubleshooting, refer to CHECKING INSTRUCTIONS/CAN DATA BUS . | CAN, isolate fault in accordance with checking instructions --> End | |
DIAGNOSIS/TROUBLESHOOTING CHART
- Ignition on
- ParkAssist control unit internal function test
- Internal function test on instrument cluster and gateway
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Continue troubleshooting, refer to CHECKING INSTRUCTIONS/CAN DATA BUS . | > End | |
DIAGNOSIS/TROUBLESHOOTING CHART
- ParkAssist control unit internal function test
- Ignition on
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Continue troubleshooting, refer to CHECKING INSTRUCTIONS/CAN DATA BUS . | > End | |
DIAGNOSIS/TROUBLESHOOTING CHART
- ParkAssist control unit internal function test
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Continue troubleshooting, refer to CHECKING INSTRUCTIONS/CAN DATA BUS . | > End | |
DIAGNOSIS/TROUBLESHOOTING CHART
- Ignition on
- ParkAssist control unit internal function test
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Continue troubleshooting, refer to CHECKING INSTRUCTIONS/CAN DATA BUS . | > End | |
DIAGNOSIS/TROUBLESHOOTING CHART
- Ignition on
- ParkAssist control unit internal function test
- Selector lever position in transmission range R or N
Note. To power the buzzer, the ignition must be switched on.
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Measure buzzer supply voltage | Switch off ignition Pull off buzzer plug Switch on ignition Measure voltage between pin 1 of buzzer plug and vehicle ground | 11.4...14.5 V Go to Step 2 | Repair line or line connection --> End |
| 2 | Check buzzer signal line for open circuit | Switch off ignition Pull plug A off ParkAssist control unit Measure line resistance between pin 10 of of plug A for ParkAssist control unit and pin 1 of buzzer plug | < 5 ohms Go to Step 3 | Repair line or line connection --> End |
| 3 | Check buzzer signal line for short circuit to B+ | Measure voltage between pin 1 of buzzer plug and ground (vehicle) | < 0.3 V Go to Step 4 | Repair line or line connection --> End |
| 4 | Check buzzer signal line for short circuit to ground | Measure resistance of signal line between pin 1 of buzzer plug and ground (vehicle) | Infinity ohms | Repair line or line connection --> End |
| 5 | Replace buzzer | > End | Go to Step 6 | |
| 6 | Replace ParkAssist control unit | > End | ||
DIAGNOSIS/TROUBLESHOOTING CHART
- Ignition on
- Selector lever position in transmission range R or N
- ParkAssist control unit internal function test
- Vehicle speed briefly greater than 14 km/h
Note. If the above environmental conditions can be eliminated as a cause and the fault has the status "present", troubleshooting must be performed.
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Visual inspection | Check sensor 12 for heavy external soiling or damage Check the sensor plug for damage and corrosion | Go to Step 2 | Remove dirt from sensor and replace, or repair sensor plug --> End |
| 2 | Perform drive link test for sensor | Using 9588 Porsche System Tester II perform drive link test for corresponding sensors | Test drive to check fault cleared --> End | Go to Step 3 |
| 3 | Check supply voltage for sensor, see also FAULT CODE 1549 for sensor supply voltage | Switch off ignition Pull plug off sensor Switch on ignition Selector lever position in transmission range R or N Measure voltage between pin 1 of the sensor plug and ground (vehicle) | Approx. 8.5 V Go to Step 4 | Repair wire or replace wiring harness --> End |
| 4 | Check ground lead of the sensor | Measure voltage between pin 1 and pin 3 of sensor plug | Approx. 8.5 V Go to Step 5 | Repair wire or replace wiring harness --> End |
| 5 | Check signal line of sensor for short to ground | Switch off ignition Pull plug off ParkAssist control unit Measure resistance between pin 16 of plug B for ParkAssist control unit and ground (vehicle) | Infinity ohms Go to Step 6 | Repair wire or replace wiring harness --> End |
| 6 | Check signal line of sensor for short to B+ | Switch on ignition Measure voltage between pin 16 of plug B for ParkAssist control unit and ground (vehicle) | < 0.3 V Go to Step 7 | Repair wire or replace wiring harness --> End |
| 7 | Check signal lead of the sensor for open circuit | Measure resistance between pin 16 of plug B for ParkAssist control unit and pin 2 of sensor plug | < 5 ohms Go to Step 8 | Repair wire or replace wiring harness --> End |
| 8 | Replace sensor | > End | Go to Step 9 | |
| 9 | Replace control module for ParkAssist | > End | ||
DIAGNOSIS/TROUBLESHOOTING CHART
- Ignition on
- Selector lever position in transmission range R or N
- ParkAssist control unit internal function test
- Vehicle speed briefly greater than 14 km/h
Note. If the above environmental conditions can be eliminated as a cause and the fault has the status "present", troubleshooting must be performed.
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Visual inspection | Check sensor 11 for heavy external soiling or damage Check the sensor plug for damage and corrosion | Go to Step 2 | Remove dirt from sensor and replace, or repair sensor plug --> End |
| 2 | Perform drive link test for sensor | Using 9588 Porsche System Tester II perform drive link test for corresponding sensors | Test drive to check fault cleared --> End | Go to Step 3 |
| 3 | Check supply voltage for sensor, see also FAULT CODE 1549 for sensor supply voltage | Switch off ignition Pull plug off sensor Switch on ignition Selector lever position in transmission range R or N Measure voltage between pin 1 of the sensor plug and ground (vehicle) | Approx. 8.5 V Go to Step 4 | Repair wire or replace wiring harness --> End |
| 4 | Check ground lead of the sensor | Measure voltage between pin 1 and pin 3 of sensor plug | Approx. 8.5 V Go to Step 5 | Repair wire or replace wiring harness --> End |
| 5 | Check signal line of sensor for short to ground | Switch off ignition Pull plug off ParkAssist control unit Measure resistance between pin 15 of plug B for ParkAssist control unit and ground (vehicle) | Infinity ohms Go to Step 6 | Repair wire or replace wiring harness --> End |
| 6 | Check signal line of sensor for short to B+ | Switch on ignition Measure voltage between pin 15 of plug B for ParkAssist control unit and ground (vehicle) | < 0.3 V Go to Step 7 | Repair wire or replace wiring harness --> End |
| 7 | Check signal lead of the sensor for open circuit | Measure resistance between pin 15 of plug B for ParkAssist control unit and pin 2 of sensor plug | < 5 ohms Go to Step 8 | Repair wire or replace wiring harness --> End |
| 8 | Replace sensor | > End | Go to Step 9 | |
| 9 | Replace control module for ParkAssist | > End | ||
DIAGNOSIS/TROUBLESHOOTING CHART
- Ignition on
- Selector lever position in transmission range R or N
- ParkAssist control unit internal function test
- Vehicle speed briefly greater than 14 km/h
Note. If the above environmental conditions can be eliminated as a cause and the fault has the status "present", troubleshooting must be performed.
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Visual inspection | Check sensor 8 for heavy external soiling or damage Check the sensor plug for damage and corrosion | Go to Step 2 | Remove dirt from sensor and replace, or repair sensor plug --> End |
| 2 | Perform drive link test for sensor | Using 9588 Porsche System Tester II perform drive link test for corresponding sensors | Test drive to check fault cleared --> End | Go to Step 3 |
| 3 | Check supply voltage for sensor, see also FAULT CODE 1549 for sensor supply voltage | Switch off ignition Pull plug off sensor Switch on ignition Selector lever position in transmission range R or N Measure voltage between pin 1 of the sensor plug and ground (vehicle) | Approx. 8.5 V Go to Step 4 | Repair wire or replace wiring harness --> End |
| 4 | Check ground lead of the sensor | Measure voltage between pin 1 and pin 3 of sensor plug | Approx. 8.5 V Go to Step 5 | Repair wire or replace wiring harness --> End |
| 5 | Check signal line of sensor for short to ground | Switch off ignition Pull plug off ParkAssist control unit Measure resistance between pin 12 of plug B for ParkAssist control unit and ground (vehicle) | Infinity ohms Go to Step 6 | Repair wire or replace wiring harness --> End |
| 6 | Check signal line of sensor for short to B+ | Switch on ignition Measure voltage between pin 12 of plug B for ParkAssist control unit and ground (vehicle) | < 0.3 V Go to Step 7 | Repair wire or replace wiring harness --> End |
| 7 | Check signal lead of the sensor for open circuit | Measure resistance between pin 12 of plug B for ParkAssist control unit and pin 2 of sensor plug | < 5 ohms Go to Step 8 | Repair wire or replace wiring harness --> End |
| 8 | Replace sensor | > End | Go to Step 9 | |
| 9 | Replace control module for ParkAssist | > End | ||
DIAGNOSIS/TROUBLESHOOTING CHART
- Ignition on
- Selector lever position in transmission range R or N
- ParkAssist control unit internal function test
- Vehicle speed briefly greater than 14 km/h
Note. If the above environmental conditions can be eliminated as a cause and the fault has the status "present", troubleshooting must be performed.
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Visual inspection | Check sensor 7 (RR outside) for heavy external soiling or damage Check the sensor plug for damage and corrosion | Go to Step 2 | Remove dirt from sensor and replace, or repair sensor plug --> End |
| 2 | Perform drive link test for sensor | Using Porsche System Tester II No. 9588 perform drive link test for corresponding sensors | Test drive to check fault cleared --> End | Go to Step 3 |
| 3 | Check supply voltage for sensor, see also FAULT CODE 1549 for sensor supply voltage | Switch off ignition Pull plug off sensor Switch on ignition Selector lever position in transmission range R or N Measure voltage between pin 1 of the sensor plug and ground (vehicle) | Approx. 8.5 V. Go to Step 4 | Repair wire or replace wiring harness --> End |
| 4 | Check ground line of sensor | Measure voltage between pin 1 and pin 3 of sensor plug | Approx. 8.5 V Go to Step 5 | Repair wire or replace wiring harness --> End |
| 5 | Check signal line of sensor for short to ground | Switch off ignition Pull plug off ParkAssist control unit Measure resistance between pin 11 of plug B for ParkAssist control unit and ground (vehicle) | Infinity ohms Go to Step 6 | Repair wire or replace wiring harness --> End |
| 6 | Check signal line of sensor for short to B+ | Switch on ignition Measure voltage between pin 11 of plug B for ParkAssist control unit and ground (vehicle) | < 0.3 V Go to Step 7 | Repair wire or replace wiring harness --> End |
| 7 | Check signal line of sensor for open circuit | Measure resistance between pin 11 of plug B for ParkAssist control unit and pin 2 of sensor plug | < 5 ohms Go to Step 8 | Repair wire or replace wiring harness --> End |
| 8 | Replace sensor | > End | Go to Step 9 | |
| 9 | Replace control unit ParkAssist | > End | ||
DIAGNOSIS/TROUBLESHOOTING CHART
- Ignition on
- ParkAssist control unit internal function test
- Selector lever position in transmission range R or N
Note. To power the sensors, the ignition must be switched on and the selector lever position in transmission range R or N If the supply voltage is low, this may be due to the resistance of the loads (sensors) being too small If the supply voltage is high, this may be due to a short circuit to B+ (12 volts)
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Measure sensor power supply | Switch off ignition Pull plug off sensor Switch on ignition Selector lever position in transmission range R or N Measure voltage between pin 1 of relevant sensor plug and ground (vehicle) To isolate faults in the case of undervoltage: pull off all sensor plugs in turn | Approx. 8.5 V Go to Step 2 | Repair line or line connection If short-circuit in sensor, replace accordingly --> End |
| 2 | Check ground supply line for sensors | Measure resistance between pin 3 of sensor plug and ground (vehicle) | < 5 ohms Go to Step 3 | Repair line or line connection --> End |
| 3 | Replace ParkAssist control unit | > End | ||
DIAGNOSIS/TROUBLESHOOTING CHART
- Ignition on
- Selector lever position in transmission range R or N
- ParkAssist control unit internal function test
- Vehicle speed briefly greater than 14 km/h
Note. If the above environmental conditions can be eliminated as a cause and the fault has the status "present", troubleshooting must be performed.
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Visual inspection | Check sensor for heavy external soiling or damage Check the sensor plug for damage and corrosion | Go to Step 2 | Remove dirt from sensor and replace, or repair sensor plug --> End |
| 2 | Perform drive link test for sensor | Using 9588 Porsche System Tester II perform drive link test for sensors | Test drive to check fault cleared --> End | Go to Step 3 |
| 3 | Check supply voltage for sensor, see also FAULT CODE 1549 for sensor supply voltage | Switch off ignition Pull plug off sensor Switch on ignition Selector lever position in transmission range R or N Measure voltage between pin 1 of sensor plug and vehicle ground | Approx. 8.5 V Go to Step 4 | Repair wire or replace wiring harness --> End |
| 4 | Check ground lead of the sensor | Measure voltage between pin 1 and pin 3 of sensor plug | Approx. 8.5 V Go to Step 5 | Repair wire or replace wiring harness --> End |
| 5 | Check signal line of sensor for short to ground | Switch off ignition Pull plug off ParkAssist control unit Measure resistance between pin 8 of plug B for ParkAssist control unit and ground (vehicle) | Infinity ohms Go to Step 6 | Repair wire or replace wiring harness --> End |
| 6 | Check signal line of sensor for short to B+ | Switch on ignition Measure voltage between pin 8 of plug B for ParkAssist control unit and ground (vehicle) | < 0.3 V Go to Step 7 | Repair wire or replace wiring harness --> End |
| 7 | Check signal lead of the sensor for open circuit | Measure resistance between pin 8 of plug B for ParkAssist control unit and pin 2 of sensor plug | < 5 ohms Go to Step 8 | Repair wire or replace wiring harness --> End |
| 8 | Replace sensor | > End | Go to Step 9 | |
| 9 | Replace control module for ParkAssist | > End | ||
DIAGNOSIS/TROUBLESHOOTING CHART
- Ignition on
- Selector lever position in transmission range R or N
- ParkAssist control unit internal function test
- Vehicle speed briefly greater than 14 km/h
Note. If the above environmental conditions can be eliminated as a cause and the fault has the status "present", troubleshooting must be performed.
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Visual inspection | Check sensor for heavy external soiling or damage Check the sensor plug for damage and corrosion | Go to Step 2 | Remove dirt from sensor and replace, or repair sensor plug --> End |
| 2 | Perform drive link test for sensor | Using Porsche System Tester II No. 9588 perform drive link test for sensors | Test drive to check fault cleared --> End | Go to Step 3 |
| 3 | Check supply voltage for sensor, see also FAULT CODE 1549 for sensor supply voltage | Switch off ignition Pull plug off sensor Switch on ignition Selector lever position in transmission range R or N Measure voltage between pin 1 of sensor plug and vehicle ground | Approx. 8.5 V Go to Step 4 | Repair wire or replace wiring harness --> End |
| 4 | Check ground line of sensor | Measure voltage between pin 1 and pin 3 of sensor plug | Approx. 8.5 V Go to Step 5 | Repair wire or replace wiring harness --> End |
| 5 | Check signal line of sensor for short to ground | Switch off ignition Pull plug off ParkAssist control unit Measure resistance between pin 7 of plug B for ParkAssist control unit and ground (vehicle) | Infinity ohms Go to Step 6 | Repair wire or replace wiring harness --> End |
| 6 | Check signal line of sensor for short to B+ | Switch on ignition Measure voltage between pin 7 of plug B for ParkAssist control unit and ground (vehicle) | < 0.3 V Go to Step 7 | Repair wire or replace wiring harness --> End |
| 7 | Check signal line of sensor for open circuit | Measure resistance between pin 7 of plug B for ParkAssist control unit and pin 2 of sensor plug | < 5 ohms Go to Step 8 | Repair wire or replace wiring harness --> End |
| 8 | Replace sensor | > End | Go to Step 9 | |
| 9 | Replace control unit ParkAssist | > End | ||
DIAGNOSIS/TROUBLESHOOTING CHART
- Ignition on
- Selector lever position in transmission range R or N
- ParkAssist control unit internal function test
- Vehicle speed briefly greater than 14 km/h
Note. If the above environmental conditions can be eliminated as a cause and the fault has the status "present", troubleshooting must be performed.
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Visual inspection | Check sensor for heavy external soiling or damage Check the sensor plug for damage and corrosion | Go to Step 2 | Remove dirt from sensor and replace, or repair sensor plug --> End |
| 2 | Perform drive link test for sensor | Using Porsche System Tester II No. 9588 perform drive link test for sensors | Test drive to check fault cleared --> End | Go to Step 3 |
| 3 | Check supply voltage for sensor, see also FAULT CODE 1549 for sensor supply voltage | Switch off ignition Pull plug off sensor Switch on ignition Selector lever position in transmission range R or N Measure voltage between pin 1 of the sensor plug and ground (vehicle) | Approx. 8.5 V Go to Step 4 | Repair wire or replace wiring harness --> End |
| 4 | Check ground line of sensor | Measure voltage between pin 1 and pin 3 of sensor plug | Approx. 8.5 V Go to Step 5 | Repair wire or replace wiring harness --> End |
| 5 | Check signal line of sensor for short to ground | Switch off ignition Pull plug off ParkAssist control unit Measure resistance between pin 4 of plug B for ParkAssist control unit and ground (vehicle) | Infinity ohms Go to Step 6 | Repair wire or replace wiring harness --> End |
| 6 | Check signal line of sensor for short to B+ | Switch on ignition Measure voltage between pin 4 of plug B for ParkAssist control unit and ground (vehicle) | < 0.3 V Go to Step 7 | Repair wire or replace wiring harness --> End |
| 7 | Check signal line of sensor for open circuit | Measure resistance between pin 4 of plug B for ParkAssist control unit and pin 2 of sensor plug | < 5 ohms Go to Step 8 | Repair wire or replace wiring harness --> End |
| 8 | Replace sensor | > End | Go to Step 9 | |
| 9 | Replace control unit ParkAssist | > End | ||
DIAGNOSIS/TROUBLESHOOTING CHART
- Ignition on
- Selector lever position in transmission range R or N
- ParkAssist control unit internal function test
- Vehicle speed briefly greater than 14 km/h
Note. If the above environmental conditions can be eliminated as a cause and the fault has the status "present", troubleshooting must be performed.
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Visual inspection | Check sensor 1 (outer FL) for heavy external soiling or damage Check the sensor plug for damage and corrosion | Go to Step 2 | Remove dirt from sensor and replace, or repair sensor plug --> End |
| 2 | Perform drive link test for sensor | Using 9588 Porsche System Tester II perform drive link test for sensors | Test drive to check fault cleared --> End | Go to Step 3 |
| 3 | Check supply voltage for sensor, see also FAULT CODE 1549 for sensor supply voltage | Switch off ignition Pull plug off sensor Switch on ignition Selector lever position in transmission range R or N Measure voltage between pin 1 of sensor plug and vehicle ground | Approx. 8.5 V Go to Step 4 | Repair wire or replace wiring harness --> End |
| 4 | Check ground lead of the sensor | Measure voltage between pin 1 and pin 3 of sensor plug. | Approx. 8.5 V Go to Step 5 | Repair wire or replace wiring harness --> End |
| 5 | Check signal line of sensor for short to ground | Switch off ignition Pull plug off ParkAssist control unit Measure resistance between pin 3 of plug B for ParkAssist control unit and ground (vehicle) | Infinity ohms Go to Step 6 | Repair wire or replace wiring harness --> End |
| 6 | Check signal line of sensor for short to B+ | Switch on ignition Measure voltage between pin 3 of plug B for ParkAssist control unit and ground (vehicle) | < 0.3 V Go to Step 7 | Repair wire or replace wiring harness --> End |
| 7 | Check signal lead of the sensor for open circuit | Measure resistance between pin 3 of plug B for ParkAssist control unit and pin 2 of sensor plug | < 5 ohms Go to Step 8 | Repair wire or replace wiring harness --> End |
| 8 | Replace sensor | > End | Go to Step 9 | |
| 9 | Replace control module for ParkAssist | > End | ||
DIAGNOSIS/TROUBLESHOOTING CHART
Poses Online