Selecting Test Mode

The following test modes are available for diagnosing ABS:

• Mode F0 (Data List) Mode continuously displays the actual reading sent to EBCM by each wheel speed sensor. Stoplight switch status and various other inputs and outputs are monitored.
• Mode F1 (Code History) Mode displays fault code history data. Fault occurrence information is stored for first 5 fault codes stored and very last fault code stored. Fault occurrence information stored consists of fault code number, number of failure occurrences and number of drive cycles since fault first and last occurred.
• Mode F2 (Trouble Codes) Mode displays ABS trouble codes stored by EBCM. Trouble codes can be cleared in this mode.
• Mode F3 (ABS Snapshot) Mode helps isolate intermittent problems by capturing data before and after fault occurred. By selecting Manual Trigger, Tech 1 will wait for ENTER to be pressed before storing speed sensor information. All stored information can be displayed and examined for conditions that may indicate a problem.
• Mode F4 (Misc. Test) In this mode, Tech 1 performs various ABS functional tests to help isolate problems during trouble shooting.
• Mode F5 (Motor Rehome) In this mode, EBCM is commanded to return all hydraulic modulator/master cylinder motors to home position (full open). This mode should always be used before bleeding the brakes.