Fault code 4440: Diagnosis/troubleshooting
NOTE:
Calibration of the steering angle sensor must be performed on a measuring platform. The steering angle sensor must be calibrated after work has been carried out on the running gear in the area of the front axle. The security code is required for calibration of the steering angle sensor. The security code is read with the PST2 under menu item "Actual values". Calibration is described in CALIBRATING STEERING ANGLE SENSOR
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WORK INSTRUCTION CHART - FAULT CODE 4440
| Work instruction | Display OK | If not OK | ||
|---|---|---|---|---|
| 1 | Check calibration of the steering angle sensor |
|
Calibration was incorrect -> End |
Step 2 |
| 2 | Check power supply of the steering angle sensor |
|
> 11 V Step 3 |
Open circuit between PSM control module plug pin 39 and pin 3 of the steering angle sensor plug, or PSM contol module faulty -> End |
| 3 | Check ground of the steering angle sensor |
|
> 11 V Step 4 |
Open circuit between PSM control module plug pin 21 and pin 4 of the steering angle sensor plug, or PSM contol module faulty -> End |
| 4 | Check CAN-high lead from PSM control module to steering angle sensor for open circuit |
|
< 5 Step 5 |
Open circuit between pin 2 of steering angle sensor plug and PSM control module plug pin 24 -> End |
| 5 | Check CAN-low lead from PSM control module to steering angle sensor for open circuit |
|
< 5 Step 6 |
Open circuit between pin 1 of steering angle sensor plug and PSM control module plug pin 40 -> End |
| 6 | Steering angle sensor faulty | -> End | ||