Pinpoint Test Notes

NOTE: Use Rotunda 73 Digital Multimeter 105-R0051 and New Generation Star (NGS) Tester 007-00500 or equivalent to perform pinpoint tests.

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. It may be necessary to correct any concerns in these areas before passing the test.

Do not replace any parts unless the test results indicate they should be replaced.

To perform correct pinpoint test procedures, follow steps in order as listed. Follow each step until a fault is found.

After completing any service to communication system, verify all components are properly connected, then clear all DTCs as described. Refer to New Generation Star Tester Usage, Retrieve/Clear Continuous DTCs.

Before servicing any communication system concern, verify that all power and ground tests for the suspect modules are completed. Repeat the Data Link Diagnostics Test by performing Pinpoint Test A.