Pinpoint Test Notes

The No Communication test(s) must be performed to verify power and ground to the suspect module(s) before performing any of the following pinpoint tests. Go to referencing section for test.

Do not perform any of the following pinpoint tests unless you are so instructed. Each pinpoint test assumes that a fault has been detected in the system with direction to enter a specific diagnostic routine. Performing any pinpoint test without direction may produce incorrect results and replacement of working components. Correct test results are dependent on the proper operation of related components/systems. Correct any concerns in these areas to pass the test.

Do not replace any parts unless the test results so indicate.

When more than one DTC is received, always start with the first DTC received.

Follow correct pinpoint test procedures steps in order. Follow each step until a condition is found.

After completing any service to communication system, verify all components are properly reconnected, then clear all DTCs.