ABS Sequence Control

1. 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 scan tool.

OPERATIONAL GUIDELINES OF THE ABS SEQUENCE CONTROL WITH ABS DIAGNOSIS CONNECTOR





1. Connect diagnosis terminals to terminals No. 4 of the diagnosis connector beside driver's seat heater unit.
2. Turn ignition switch to ON.
3. Make sure only the start code (code 11) is shown in normal condition.

NOTE: When trouble codes are stored in memory, repair the faulty parts.

4. Set the speed of all wheels at 10 km/h (6 MPH) or less.
5. Turn ignition switch OFF.
6. Within 0.5 seconds after the ABS and Traction Control System (TCS) warning light goes out, depress the brake pedal and hold it immediately after ignition switch is turned to ON.

NOTE:
^ When the ignition switch is set to on, the brake pedal must not be depressed.
^ Engine must operate.
^ If brake pedal is not depressed within 0.5 seconds after ABS and TCS warning lights go out, the trouble code mode comes on.

7. After completion of ABS sequence control, turn ignition switch OFF.

OPERATIONAL GUIDELINES OF THE ABS SEQUENCE CONTROL WITH SCAN TOOL
1. Connect scan tool to data link connector beside driver's seat heater unit.
2. Start engine.
3. Put scan tool to TCS mode.





4. Press F D 1 ENT key.





5. The message shown in the figure is displayed as follows:
(1) When using the brake tester, depress brake pedal with braking force of 981 to 1,471 N (100 to 150 kg, 221 to 331 lbs.).
(2) When using the pressure gauge, depress brake pedal so as to make the pressure gauge indicate 3,432 kPa (35 kg/cm sq., 498 psi).





6. When the message shown in the figure is displayed, press ENT key.
7. Check points will be displayed on scan tool.





8. 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.

9. After completion of ABS sequence control, turn ignition switch OFF.

CONDITIONS FOR COMPLETION OF ABS SEQUENCE CONTROL
When the following conditions develop, the ABS sequence control stops and ABS and TCS function will then stop. The brake system functions as a conventional brake system.
1. When the speed of at least one wheel reaches 10 km/h (6 MPH).
2. When terminal No. 4 is separated from ground. (When scan tool is not used.)
3. When the brake pedal is released during sequence control and the braking lamp switch is set to off.
4. After completion of the sequence control.
5. When malfunction is detected.

NOTE: When malfunction has been detected and the ABS sequence control operation has stopped, the trouble codes are stored in memory.

CONDITIONS FOR ABS SEQUENCE CONTROL





NOTE:
^ When scan tool is used, control operation starts at point A. It is not required to operate brake lamp switch for starting ABS sequence control operation. The patterns from ignition key ON to the point A show that operation is started by diagnosis connector.