ABS Sequence Control
ABS SEQUENCE CONTROL1) Under the ABS sequence control, after the hydraulic unit solenoid valve is driven, the operation of the hydraulic unit can be checked by means of the brake tester or pressure gauge.
2) ABS sequence control can be started by diagnosis connector or select monitor.
Operational Guidelines Of The ABS Sequence Control With Diagnosis Connector
1) Connect diagnosis terminals to terminals No.3 and No. 6 of the diagnosis connector beside driver's seat heater unit.
2) Set the speed of all wheels at 4 km/h (2 MPH) or less.
3) Turn ignition switch OFF.
4) Within 0.5 seconds after the ABS warning light goes out, depress the brake pedal and hold it immediately after ignition switch is turned to ON.
CAUTION: Do not depress the clutch pedal.
NOTE:
- When the ignition switch is set to on, the brake pedal must not be depressed.
- Engine must not operate.
5) After completion of ABS sequence control, turn ignition switch OFF.
OPERATIONAL GUIDELINES OF THE ABS SEQUENCE CONTROL WITH SELECT MONITOR
NOTE: In the event of any trouble, the sequence control may not be operative. In such a case, activate the sequence control, referring to "OPERATIONAL GUIDELINES OF THE ABS SEQUENCE CONTROL WITH DIAGNOSIS CONNECTOR ".
1) Connect select monitor to data link connector beside driver's seat heater unit.
2) Turn ignition switch ON.
3) Put select monitor to ABS mode.
4) Press F D 1 ENT key.
5) The message shown in the figure is displayed.
6) The message shown in the figure is displayed as follows:
(1) When using the brake tester, depress brake pedal with braking force of 981 N (100 kg, 221 Ib).
(2) When using the pressure gauge, depress brake pedal so as to make the pressure gauge indicate 3,432 kPa (35 kg/cm2, 498 psi).
CAUTION: Do not depress the clutch pedal.
7) When the message shown in the figure is displayed, press ENT key.
8) Check points will be displayed on select monitor.
9) When ABS sequence control cannot be started (by system malfunction, etc.), the message shown in the figure will be displayed.
NOTE: Read the trouble codes. Repair faulty parts.
10) After completion of ABS sequence control.
11) Press 0 key to start ABS sequence control again and press 1 key to end.
CONDITIONS FOR COMPLETION OF ABS SEQUENCE CONTROL
When the following conditions develop, the ABS sequence control stops and ABS operation is returned to the normal control mode.
1) When the speed of at least one wheel reaches 10 km/h (6 MPH).
2) When terminal No.3 or No.6 are separated from diagnosis terminals. (When select monitor is not used.)
3) When the brake pedal is released during sequence control and the braking lamp switch is set to off.
4) When brake pedal is depressed after ignition key is turned to ON, and before ABS warning light goes out.
(When select monitor is not used.)
5) When brake pedal is not depressed after ignition key is turned to ON, and within 0.5 seconds after ABS warning light goes out. (When select monitor is not used.)
6) After completion of the sequence control.
7) When malfunction is detected. (When select monitor is used.)
CONDITIONS FOR ABS SEQUENCE CONTROL
NOTE:
- When select monitor is used, control operation starts at point A. The patterns from IGN key ON to the point A show that operation is started by diagnosis connector.
- HIGH means high voltage.
- LOW means low voltage.