Preparing for TOGAF certification while working as a test engineer can be challenging, but it is definitely possible. Here are some steps you can take to prepare for the certification:

1. Review the TOGAF 9 documentation: The TOGAF documentation can be downloaded for free from the Open Group website. Review the documentation to familiarize yourself with the TOGAF framework, architecture development method (ADM) and the different levels of certification.

2. Take an online course: There are a number of online courses available that cover the TOGAF framework and the certification exam. These courses provide a structured way to study and can help you prepare for the exam in a more efficient manner.

3. Study groups: Join study groups or communities of TOGAF certified individuals or those preparing for the certification. This will help you to connect with like-minded individuals, share study materials, and tips.

4. Practice with sample questions: The Open Group provides sample questions for each level of the TOGAF certification exam. Use these to practice and understand the format and level of difficulty of the actual exam.

5. Tailor your approach: As a test engineer, you are already familiar with the software development life cycle and methodologies, so you can focus on the areas of TOGAF that align more with your current role.

6. Read relevant articles, white papers and case studies: Read articles and white papers on the TOGAF framework and best practices in enterprise architecture. Case studies of organizations that have implemented TOGAF will give you a better understanding of how the framework is applied in real-world scenarios.

7. Experience: Get as much experience as possible in the area of enterprise architecture. Seek out opportunities to work on enterprise architecture projects or initiatives within your organization, this will give you more context and hands-on experience with the TOGAF framework.

8. Schedule the exam: Once you feel you are ready, schedule your exam. The Open Group offers both online and in-person proctored exams, so you can choose the option that works best for you.

It is important to note that preparation for the certification and passing the exam is a significant commitment, you might want to consider if it aligns with your career goals and objectives.