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The measurement of data link resistance on a composite engine is conducted between terminals 6 and 14. This specific pair of terminals is designated for the data link communication and diagnostic processes, which are critical for assessing engine performance and troubleshooting potential issues.

When measuring resistance at these terminals, technicians can verify if the data link circuit is functioning properly. A resistance measurement that falls outside of specified limits can indicate issues such as a short circuit, open circuit, or other malfunctions in the communication lines, which should be addressed for optimal engine performance.

It’s important to note that the other terminal combinations do not correspond to the correct locations for data link resistance measurement. Each terminal has its specific purpose, and using non-designated pairs could result in inaccurate readings or misdiagnosis of performance problems. This understanding of terminal functions is crucial for advancing engine diagnostics and repair strategies.