The power steering column adjustment in some Audi Q7 models can malfunction, leaving the driver stuck with an uncomfortable driving position. This issue often requires a VCDS (VAG-COM Diagnostic System) reset and potentially some manual intervention. This article explores potential solutions, focusing on the use of VCDS and addressing common problems with the steering column adjustment motor.
Understanding the Problem: Audi Q7 Steering Column Adjustment Failure
The inability to adjust the steering wheel up and down (telescoping function) is a known issue in some Audi Q7s. This malfunction can stem from several causes, ranging from a simple loss of calibration to a faulty steering column adjustment motor or position sensor. Often, the issue manifests as the steering column being stuck in one position, unresponsive to the controls.
VCDS Basic Settings for Steering Column Adjustment
The first step in troubleshooting is to attempt a basic setting reset using VCDS. This procedure recalibrates the steering column adjustment module (J519) and can resolve minor issues. The process generally follows these steps:
- Connect VCDS to the vehicle’s OBD-II port.
- Select [09 – Central Electronics].
- Go to [Basic Settings – 04].
- Select Group 001.
- Click [Go!] to activate the Basic Setting.
- Follow the on-screen prompts, cycling the steering column through its full range of motion (up, down, forward, back). This is crucial for the module to learn the end positions.
- Click [ON/OFF/Next] to initiate the learning process.
- Once complete, select [Done, Go Back] and then [Close Controller, Go Back – 06].
Manual Intervention: Applying External Power to the Motor
If the VCDS reset fails, the steering column adjustment motor might need manual intervention. This involves applying an external 12V power source directly to the motor to force it to reach its end positions. This can sometimes help the J519 module recognize the motor’s movement and allow for a successful reset.
Caution: This procedure should be performed with extreme care. Disconnecting the motor connector from the control circuit before applying external power is essential to prevent damage to the control module.
- Disconnect the motor’s electrical connector.
- Using a 12V power source (e.g., a car battery charger), briefly apply power to the up/down motor terminals to move the column.
- Reconnect the motor connector.
- Attempt the VCDS basic setting procedure again.
Identifying Potential Faulty Components: Position Sensors
If neither the VCDS reset nor manual intervention resolves the issue, suspect faulty components like position sensors (potentially G357 and G358). Consulting the vehicle’s wiring diagram can help identify these sensors and test their functionality. A multimeter can be used to check for proper voltage and resistance readings.
Conclusion: Resolving Steering Adjust Issues with VCDS
Addressing a malfunctioning Audi Q7 steering column adjustment often involves using VCDS for a basic setting reset. If this fails, carefully applying external power to the motor can sometimes trigger a successful recalibration. In cases where these methods are unsuccessful, further diagnosis may be required to identify and replace faulty components like position sensors. Remember to consult a qualified technician if you are uncomfortable performing these procedures.
