If your Vauxhall Astra H is experiencing issues with the ESP light staying on, it might be related to the CIM (Steering Column Module). This guide outlines the steps to reset the security code on your Astra H using Opcom diagnostic software, based on a successful user experience.
Resetting the Astra H Security Code with Opcom: A Step-by-Step Guide
Before you begin, ensure you disconnect the negative terminal of your battery for at least five minutes to prevent any accidental airbag deployment. Always follow safety precautions when working with airbags and steering wheel components.
Accessing the CIM Module:
- With the battery reconnected, connect your Opcom interface to the car’s OBD-II port and launch the Opcom software on your computer.
- Navigate to Diagnostics and select your Astra H model year (2007 in this case).
- Go to Body and then select CIM (Steering Column Module).
Adjusting Steering Angle Sensor Offset (Potentially Optional):
- Within the CIM module, access Measuring Block 3.
- Observe the Steering Angle Sensor offset value. If necessary, adjust it to 0.00 by carefully moving the steering wheel. Note: It’s uncertain whether this step is always required.
Programming the Security Code:
- Return to the main CIM screen and select Programming.
- Choose Security Code.
- Enter the security code provided on the card that came with your vehicle. If the CIM wasn’t centralized beforehand, this code might not be accepted. Centralizing the CIM might be necessary in such cases.
Steering Angle Calibration:
- Go back to the Programming screen and select Steering Angle Calibration.
- Initially, it might display “Steering Angle calibrated – No”.
- Choose Activate and wait. The status should eventually change to “Steering Angle calibrated – Yes”.
Clearing Fault Codes:
- Critically, delete ALL fault codes in the system. Deleting only the CIM module codes might not resolve the issue.
Verification:
- Turn on the ignition. The ESP light should illuminate briefly and then turn off after a few seconds, indicating a successful reset. If the light remains on, double-check all steps and ensure all fault codes have been cleared.
Final Thoughts on Reseting Your Security Code
This process proved successful in resolving the ESP light issue and passing the MOT test. Remember to consult resources like eBay to familiarize yourself with the CIM’s appearance if needed. Always exercise caution when working with vehicle electronics and consult a professional if you are unsure about any step.
