Speed Sensor Signal and Deceleration Sensor Check

SPEED SENSOR SIGNAL AND DECELERATION SENSOR CHECK

(a) Check the speed sensor signal.
(1) Turn the ignition switch OFF.





(2) Using SST, connect terminals Ts and E1 of the DLC1.
SST 09843-18020
(3) Start the engine.





(4) Check that the ABS warning light blinks.

HINT: If the ABS warning light does not blink, inspect the ABS light circuit.

(5) Drive vehicle straight forward.

HINT: Drive vehicle at faster than 45 km/h (28 mph) for several seconds.

(6) Stop the vehicle.
(7) Using SST, connect terminals Tc and E1 of the DLC1.
SST 09843-18020





(8) Read the number of blinks of the ABS warning light.

HINT:
- See the list of step (d).
- If every sensor is normal, a normal code is output (A cycle of 0.25 sec. ON and 0.25 sec. OFF is repeated).
- If 2 or more malfunctions are indicated at the same time, the lowest numbered code will be displayed 1st.

(9) After doing the check, disconnect terminals Ts and E1, Tc and E1 of the DLC1, and turn ignition switch OFF.
(b) Check the deceleration sensor detection point.
(1) Turn the ignition switch OFF.





(2) Using SST, connect terminals Ts and E1 of the DLC1.
SST 09843-18020
(3) Start the engine.





(4) Check that the ABS warning light blinks.

HINT: If the ABS warning light does not blink, inspect the ABS warning light circuit.





(5) Jack up the rear side of the vehicle slowly.

HINT: When measuring the height, measure at the center of the lower body of the vehicle.

(6) Check that the warning light blinks.
If the warning light turns on, inspect the deceleration sensor installation. If the sensor installation is OK, replace the deceleration sensor.
(7) Jack down the vehicle slowly.





(8) Jack up the front side of the vehicle slowly, as shown in the illustration.

HINT: When measuring the height, measure at the center of the lower body of the vehicle.





(9) Check that the warning light blinks.
If the warning light turns on, inspect the deceleration sensor installation. If the sensor installation is OK, replace the deceleration sensor.
(10) Jack down the vehicle slowly.
(c) DECELERATION SENSOR OPERATION CHECK
(1) Drive the vehicle straight ahead at about 20 km/h (12.4 mph) or more, lightly depress the brake pedal.
(2) Check that there is no change in the warning light pattern.
(3) Drive the vehicle straight ahead at about 20 km/h (12.4 mph) or more, and depress the brake pedal moderately.





(4) Check that the warning light turns on while braking.
(5) Drive the vehicle straight ahead at about 20 km/h (12.4 mph) or more, and depress the brake pedal strongly.





(6) Check that the warning light pattern changes while braking, as shown.
If the operation is not as specified, inspect the deceleration sensor installation. If the sensor installation is OK, replace the deceleration sensor.
(7) Stop the vehicle and turn the ignition switch OFF.





(d) Check the DTC of the speed sensor function.