Service Hints

SYSTEM OUTLINE

ABS is a brake system designed for the purpose to improve the operating ability securing the stability of the vehicle by preventing the locking-up of the vehicle controlling the wheel cylinder pressure of all the four wheels at the time of sudden braking.

1. INPUT SIGNALS

1. Speed sensor signal
The speed of the wheels is detected and input to TERMINALS FL+, FR+, RL+, and RR+ of the ABS actuator and ECU.

2. Stop light SW signal
ABS (W Traction Control)

AB, A9 ABS SPEED SENSOR FRONT LH, RH
1 - 2 : 1.5 - 1.7 kOhm (20 °C, 68 °F)

A29, A30 ABS SPEED SENSOR REAR LH, RH
1 - 2 : 1.5 - 1.7 kOhm (20 °C, 68 °F)

A20 ABS & BA & TRAC & VSC ECU
51 - GROUND : Always approx. 12 volts
48 - GROUND : Approx. 12 volts with the stop light SW on
28, 29 - GROUND : Always continuity

S4 STOP LIGHT SW
2 - 1 : Closed with brake pedal depressed


ABS (W/O Traction Control)

A8, A9 ABS SPEED SENSOR FRONT LH, RH
1 - 2 : 1.5 - 1.7 kOhm (20 °C, 68°F)

A29, A30 ABS SPEED SENSOR REAR LH, RH
1 - 2 : 1.5 - 1.7 kOhm (20 °C, 68 °F)

A7 ABS ACTUATOR AND ECU
17, 18 - GROUND : Always approx. 12 volts
14 - GROUND : Approx. 12 volts with the stop light SW on
15 - GROUND : Approx. 12 volts with the ignition SW at ON position
16, 19 - GROUND : Always continuity