Selecting Test Mode
Five test modes are available for diagnosing ABS/TCS. Test modes are:
- 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.
If MANUAL TRIGGER is selected, Tech 1 will wait for ENTER to be pressed before storing data. Tech 1 stores data from 8 seconds before trigger and 8 seconds after trigger is activated. All stored information can be displayed and examined for conditions which might indicate a problem, but may not set a code.
If AUTOMATIC TRIGGER is selected, Tech 1 will capture data which deviates from normal conditions but may not set a DTC, such as driving over bumpy roads or railroad tracks. Condition may be caused by loose connections or intermittent wiring problems causing signal to drop out momentarily. While Tech 1 is waiting for a trigger, ENTER or F9 key may be used to force a trigger.
- Mode F4 (Misc. Test): Mode is used to perform following tests.
- SOLENOID VALVE PRESSURE HOLD TEST
- SOLENOID VALVE PRESSURE RELEASE TEST
- AUTO TEST
- TCS TEST
- LAMP/MESSAGE TEST
- AUTO BLEED PROCEDURE
By selecting appropriate test and observing results, error conditions and faults can be further identified.