DRIVE-CONTROL COMPONENTS- ABS
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NOTE
*l: The ABS-ECU can detect only an open circuit from the moment the ECU power supply is ON.
The ABS-ECU lights the ABS warning light when it detects an open circuit, but it does not immediately store
i the trouble code in memory and does not cause the system to shut down.
When an open circuit is detected, the trouble code is stored in memory and the system caused to shut down
when the vehicle starts and the wheel speed reaches 6 km/h (4 mph) (the first acceleration after theIG has
been placed in the ON state).
Troubles other than an open circuit cannot be detected until the wheel speed reaches 6 km/h (4 mph). When
the ABS-ECU detects any of these troubles, it causes the system to shut down and simultaneously lights the
ABS warning light.
The shut downresponce time varies with the wheel speed as described below.
First start after engine start:
l When the wheel speed is less than 10 km/h (6 mph), the system shuts down 60 seconds later.
l When the wheel speed is 10 km/h (6 mph) or more, the system shuts down immediately.
Restart:
l When the wheel speed is less than 20 km/h (12 mph), the system shuts down 60 seconds later.
l When the wheel speed is 20 km/h (12 mph) or more, the system shuts down immediately.
When the ABS-ECU detects a wheel speed sensor error during ABS control, it causes the system
to come down and simultaneously lights the ABS warning light after ABS control.
*2: The ABS-ECU takes more than 15 minutes from when it detects an error to when it determines that the fault
has occurred.
*3: The ABS-ECU makes an initial check on the motor relay and motor when the wheel speed reaches 6 km/h
(4 mph) for the first time after engine start. If anything wrong is detected, it causes the system to shut down
and simultaneously lights the ABS warning light.