Quick Test - QT

Quick Test - QT

This Diagnostic Procedure is used only on Probe vehicles equipped with Anti-Lock Brake System (ABS). The Quick Test Procedure should be used only when diagnosing ABS symptoms.

Quick Test is divided into two specialized tests: "Key On Engine Running Test" and "Continuous Test". Prior to performing either test, an inspection of the ABS Warning Light is required to verify that indeed a fault has been detected by the ABS control module or if the system is operating normally. When the ABS System is operating normally, the ABS Warning Light will illuminate during Key On Engine Off and go off after the engine has started. If the ABS Warning Light should stay on after the engine starts, this indicates a present failure. All failure codes are stored in the ABS control module until they are erased. ABS Service Codes are retrieved by identifying voltage fluctuations of a voltmeter connected to the ABS Test Connector, flashing of the ABS Warning Light, or by using the Super Star II Tester with Probe ABS adapter 007-00099. The Service Codes may indicate different failures and parting from the Quick Test Procedure may result in code identification error. Therefore, it is recommended that the Quick Test Procedure be followed to its entirety. ABS Warning Light mode inspection and ABS Service Code retrieval are covered in Quick Test.


Key On Engine Running Test

When activated, the test checks the ABS control module and system circuitry by testing its integrity and processing capability, and verifies that the various sensors and actuators are connected and operating properly. Code patterns will be indicated through the ABS Test Connector and the ABS Warning Light will indicate the type of failure.


Continuous Test

This test is intended as an aid in diagnosing intermittent failures in the ABS system. It is identical to the Key on Engine Running Test, but also allows the technician to enter this mode of the test and to attempt to recreate the intermittent failure by tapping, moving, and wiggling the harness and/or suspected sensor. Faults will be indicated by Service Codes using a voltmeter or Super Star II Tester. Now with the knowledge of the affected circuits, a close check of the harness and associated connectors can be made.

NOTE: Remember to keep your eyes on the VOM, Super Star II, and ABS Warning Light for any change which will indicate where the intermittent is located.

When directed to a Pinpoint Test, look carefully at the Schematic on the first page. Any time a repair is made, erase ABS control module memory and repeat Quick Test to ensure that the repair was effective. If all phases of Quick Test result in a pass, it is likely that the problem is non-electronic related and will be found in Section 06-00.





1991
06-09-10 Anti-Lock Brake System 06-09-10

DIAGNOSIS AND TESTING (Continued)





1991
06-09-11 Anti-Lock Brake System 06-09-11

DIAGNOSIS AND TESTING (Continued)





1991
06-09-12 Anti-Lock Brake System 06-09-12

DIAGNOSIS AND TESTING (Continued)





1991
06-09-13 Anti-Lock Brake System 06-09-13

DIAGNOSIS AND TESTING (Continued)