Craftsman Scan Tool 39853 Manual: Steering Angle Sensor Calibration for Audi A8 (4N)

The Craftsman scan tool 39853 can help perform various diagnostic tasks, including steering angle sensor calibration. This guide provides a step-by-step procedure for calibrating the steering angle sensor on an Audi A8 (4N) using a diagnostic tool. A misaligned steering angle sensor can trigger warning lights and affect driving assistance systems. Proper calibration ensures accurate readings and optimal vehicle performance.

Calibrating the Steering Angle Sensor on an Audi A8 (4N)

Before starting the calibration process, ensure the vehicle is parked on a level surface with the engine running.

Initialization:

1. Connect your diagnostic tool (like the Craftsman 39853) to the vehicle’s OBD-II port.
2. Navigate to the “Steering Column” control unit (address 44). This module controls the steering assistance system and the steering angle sensor.
3. Access “Basic Settings” and select “Steering Angle Sensor Initialization.”
4. Follow the on-screen prompts to initialize the sensor. This prepares the system for calibration.

Calibration:

1. Go to “Live Data” and find “Steering Angle Sensor, Angle.” Enter the security code if prompted. Note the current angle reading.
2. Return to “Steering Assistance” (44) and select “Basic Settings,” then “Steering Angle Sensor.”
3. Initiate the calibration procedure. The system will guide you through the steps. Typically, this involves turning the steering wheel to the extreme right, holding for 5 seconds, returning to center, then turning to the extreme left and holding for 5 seconds. Finally, return the wheel to the center and hold for 10 seconds. These precise movements allow the sensor to learn the steering wheel’s range of motion.
4. After completing the sequence, wait for approximately 90 seconds before pressing the “Stop” button to conclude the calibration. This allows the system to process the new data.

Verification:

1. Turn off the engine, remove the key, open and close the driver’s door. This resets the vehicle’s systems.
2. Restart the engine. Warning lights related to tire pressure or Electronic Stability Control (ESC) may illuminate briefly. This indicates the calibration has been successful and triggered a system check.
3. Reconnect your diagnostic tool and scan for fault codes. Clear any existing codes related to the steering angle sensor.
4. If the “Steering Stops Calibration” is required, navigate to “Steering Column,” “Basic Settings,” and “Steering Angle Sensor Zero Calibration with Steering Wheel Scales.” Follow the prompts, turning the wheel to the right and left until you hear a beep, then center it. If no beep occurs initially, repeat the process starting with the left turn. Afterward, stop the calibration, go back, scan for faults, and clear them. This final step ensures the sensor accurately detects the steering wheel’s end positions.

This procedure provides a general guideline. Consult your Craftsman Scan Tool 39853 Manual for specific instructions related to its operation and navigation. Always refer to the vehicle’s repair manual for detailed information and safety precautions before performing any diagnostic or repair procedures. Correct calibration ensures the proper functioning of safety and driver-assistance systems.