How to Use Pinpoint Tests

Do not perform any of the following Pinpoint Tests unless you are so instructed by the Quick Test. Each Pinpoint Test assumes that a fault has been detected in the system with direction to enter a specific repair routine. Performing any Pinpoint Test without direction from the Quick Test may produce incorrect results and replacement of non-defective components. Correct test results for the quick Test are dependent on the proper operation of related components/systems. It may be necessary to correct any defects in these areas before passing the Quick Test.





The chart gives a list of the ABS control module pins to Rotunda Breakout Box 418-005 (014-00322), or equivalent, pins. The Breakout Box is used to make measurements at the ABS control module to avoid possible damage to pins by probing. It also allows a "window" into the ABS system while it is functioning.





When using the Breakout Box, you must also use the Rotunda ABS Breakout Box Adapter 418-F019 (007-00055), or equivalent.

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

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

Do not measure voltage or resistance at the processor unless otherwise specified.

Do not connect any test lights to the processor.

Turn the key OFF and disconnect both ends of a circuit whenever checking for shorts or continuity unless otherwise specified.

Disconnect solenoids and switches from the harness before measuring for continuity, resistance, or energizing by way of a 12 volt source.

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

After completing any repairs to the anti-lock brake system (ABS), verify that all components are properly reconnected and repeat the Quick Test. Quick Tests