How to Use Pinpoint Tests

- Do not perform any of the pinpoint tests unless you are so instructed. Each 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 part(s) unless the test results indicate they should be replaced.

- When more than one Diagnostic Trouble Code (DTC) is received, always start with the first code received.

- Do not measure voltage or resistance at the control module unless otherwise instructed.

- Use the breakout box chart to determine the correct circuits and pins. Control Module Pinout Values

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

- After completing service to the anti-lock system, verify that all components are properly reconnected, then clear all DTCs. Clearing Trouble Codes