Technician A says that, with some antilock braking systems, the diagnostic trouble code may be lost if the ignition is turned off before retrieving the code. Technician B says that some antilock braking systems require that a terminal be grounded to cause the amber ABS warning lamp to flash diagnostic trouble codes. Which technician is correct?

Question

Quizplus · Accepted Answer

Both statements are accurate. Technician A is correct because certain antilock braking systems (ABS) can lose the stored diagnostic trouble codes (DTCs) if the ignition is turned off before the codes are retrieved. Technician B is correct because, in some ABS systems, grounding a specific terminal is a method used to trigger the ABS warning lamp to flash the DTCs.

Technician a Says That, with Some Antilock Braking Systems, the Diagnostic