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
- Diagnostic conditions are met
- All plug connections and ground points of the affected current path are OK.
- View the fault frequency counter in the 9588 Porsche System Tester II using the fault memory Info key [F8] under 'Extended fault memory' and try to reach conclusions about eliminating any loose contacts in the system
Diagnostic conditions
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
- Clear fault memory.
- Satisfy the requirements listed under 'Diagnostic conditions'.
- Read out fault memory again
Diagnosis/troubleshooting
Note. The fault memory Info key [F8] on 9588 Porsche System Tester II can be used to access the 'extended fault memory'. The following information can be displayed
- Ignition on
- Internal function test of steering column switch (with electronic unit)
Note. Before replacing the control module, the ground connections, power supply and plug connections on the steering column switch must be checked and found to be OK. When replacing the steering column switch (with electronic unit), observe the coding of the control module. After the test drive, read out the fault memory with the Porsche System Tester II No. 9588 again. Additional causes of faults that could damage the steering column switch (with electronic unit) should be detected and remedied.
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Replace steering column switch (with electronic unit) | > End | |
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal functional check on electronic unit in steering column switch
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Continue troubleshooting, Refer to CHECKING INSTRUCTIONS/CAN DATA BUS . | > End | |
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal functional check on electronic unit in steering column switch
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Continue troubleshooting, Refer to CHECKING INSTRUCTIONS/CAN DATA BUS . | > End | |
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal function test of steering column switch (with electronic unit)
Note. Battery positive voltage: A battery positive voltage of between 11.4 and 14.5 V is required for the following troubleshooting procedure. This must be checked and ensured, if necessary. On the vehicle electrical system, the voltage must be ensured up to the fuse (input side).
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Check battery positive voltage | Go to Step 3 | Go to Step 2 |
| 2 | Check the battery or alternator. | Go to Step 3 | Charge battery or Replace battery Repair generator --> End |
| 3 | Check ground points and plug connection on the vehicle battery and plug connections on the steering column switch (with electronic unit) to ensure that they are securely seated and not corroded. | > End | Clean/repair plug connections and/or ground points --> End |
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal functional check on electronic unit in steering column switch
Note. Manual check: In the next troubleshooting section, please check first to see whether there is a mechanical fault on the direction indicator switch and whether this can be remedied.
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Replace direction indicator switch | > End | Go to Remove direction indicator switch, then step 2 |
| 2 | Replace electronic unit in direction indicator switch | > End | Go to Step 3 |
| 3 | Continue troubleshooting, Refer to CHECKING INSTRUCTIONS/CAN DATA BUS . | > End | |
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal functional check on electronic unit in steering column switch
Note. Manual check: Manual check: In the next troubleshooting section, please check first to see whether there is a mechanical fault on the wiper switch for intermittent mode and whether this can be remedied.
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Replace windshield wiper switch | > End | Go to Remove windshield wiper switch, then step 2 |
| 2 | Replace electronic unit in direction indicator switch | > End | Go to Step 3 |
| 3 | Continue troubleshooting, Refer to CHECKING INSTRUCTIONS/CAN DATA BUS . | > End | |
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal functional check on electronic unit in steering column switch
Note. Visual inspection: In the next troubleshooting section, please check first that the 'pins' on the vehicle electrical system (CAN comfort) control module plug connection and the 'pins' on the fanfare plug connection are neither damaged nor corroded or that the wiring to the high-pitch/low-pitch fanfare are neither damaged nor trapped.
Note. Manual check: In the next troubleshooting section, please check first to see whether there is a mechanical fault on the horn actuator and whether this can be remedied.
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Replace horn actuator | > End | Go to Remove horn actuator, then step 2 |
| 2 | Replace electronic unit in direction indicator switch | > End | Go to Step 3 |
| 3 | Continue troubleshooting, Refer to CHECKING INSTRUCTIONS/CAN DATA BUS . | > End | |
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal functional check on electronic unit in steering column switch
Note. Manual check: In the next troubleshooting section, please check first to see whether there is a mechanical fault on the GRA operating element and whether this can be remedied.
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Replace GRA operating element | > End | Go to Remove GRA operating element, then step 2 |
| 2 | Replace electronic unit in direction indicator switch | > End | Go to Step 3 |
| 3 | Continue troubleshooting, Refer to CHECKING INSTRUCTIONS/CAN DATA BUS . | > End | |
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal functional check on electronic unit in steering column switch
Note. After recoding or coding for the first time and carrying out the test drive, read out the fault memory again using the 9588 Porsche System Tester II. Additional causes of faults that could damage the electronic unit in the steering column switch should be detected and remedied.
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Electronic unit in steering column switch correctly coded | > End | |
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal function test of steering column switch (with electronic unit)
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Read out instrument cluster fault memory | For further troubleshooting, please follow the diagnosis instructions for the instrument cluster, refer to DIAGNOSIS/TROUBLESHOOTING . --> End | |
| 2 | Continue troubleshooting, Refer to CHECKING INSTRUCTIONS/CAN DATA BUS . | > End | |
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal function test of steering column switch (with electronic unit)
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Read out fault memory for driver's memory seat adjustment control module | For further troubleshooting, please follow the diagnosis instructions for the memory seat adjustment control module, refer to DIAGNOSIS/TROUBLESHOOTING . --> End | |
| 2 | Continue troubleshooting, Refer to CHECKING INSTRUCTIONS/CAN DATA BUS . | > End | |
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal function test of steering column switch (with electronic unit)
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Read out fault memory for steering column switch (with electronic unit) | Go to Step 2 | |
| 2 | Continue troubleshooting, Refer to CHECKING INSTRUCTIONS/CAN DATA BUS . | > End | |
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal function test of steering column switch (with electronic unit)
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Continue troubleshooting, Refer to CHECKING INSTRUCTIONS/CAN DATA BUS . | > End | |
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal function test of steering column switch (with electronic unit)
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Replace steering column switch (with electronic unit) | > End | |
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal functional check on electronic unit in steering column switch
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Replace sensor for heated steering wheel | > End | Remove sensor for heated steering wheel, then step 2 |
| 2 | Replace electronic unit in direction indicator switch | > End | Go to Step 3 |
| 3 | Continue troubleshooting, Refer to CHECKING INSTRUCTIONS/CAN DATA BUS . | > End | |
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal function test of steering column switch (with electronic unit)
- Ignition on
- Internal function test of steering column switch (with electronic unit)
- Ignition on
- Internal functional check on electronic unit in steering column switch
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Replace heated steering wheel | > End | Remove heated steering wheel, then step 2 |
| 2 | Replace electronic unit in direction indicator switch | > End | Go to Step 3 |
| 3 | Continue troubleshooting, Refer to CHECKING INSTRUCTIONS/CAN DATA BUS . | > End | |
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
- Ignition on
- Internal functional check on electronic unit in steering column switch
Note. Manual check: In the next troubleshooting section, please check first to see whether there is a mechanical fault in the steering wheel adjustment (ON/OFF switch) and whether this can be remedied.
| Work instruction | Display OK | If not OK | |
|---|---|---|---|
| 1 | Replace steering column adjustment switch | > End | Remove steering column adjustment switch, then step 2 |
| 2 | Replace electronic unit in direction indicator switch | > End | Go to Step 3 |
| 3 | Continue troubleshooting, Refer to CHECKING INSTRUCTIONS/CAN DATA BUS . | > End | |
DIAGNOSIS/TROUBLESHOOTING PROCEDURE
Poses Online