Speed Sensor Signal and Deceleration Sensor Check

SPEED SENSOR AND DECELERATION SENSOR DIAGNOSIS SYSTEM DIAGNOSIS SYSTEM INSPECTION

PRECAUTION
While checking the speed sensor diagnosis system, ABS does not operate and brake system operates as normal brake system.

1. INSPECT BATTERY POSITIVE VOLTAGE
Inspect that the battery positive voltage is 10 - 14 V.






2. CHECK WARNING LIGHT TURNS ON
(a) Confirm that center differential is free.
(b) Turn the ignition switch ON.
(c) Check the "ABS" warning light turns on for 3 seconds. If not inspect and repair or replace the fuse, bulb and wire harness.
(d) Check the "ABS" warning light turns off.
(e) Turn the ignition switch OFF.






3. DO FOLLOWING STEPS
(a) Using SST, connect terminals Ts and E1 of the DLC 1. SST 09843-18020
(b) Start the engine.






(c) Check the warning light blinks about 4 times every 1 second, as shown.






4. INSPECT DECELERATION SENSOR OPERATION
(a) Drive the vehicle straight ahead at about 20 km (12.4 mph) or more, depress the brake pedal moderately.
(b) Check the warning light turns on while braking.

5. INSPECT SPEED SENSOR Signal CHANGE
(a) Drive the faster than 45 km/h (28 mph) for several seconds.






(b) Check the warning light signal. If the warning light signal is abnormal, perform the steps 6 and 7.

HINT:
- If the deceleration sensor operation in step 4 does not occur, an abnormal signal is output.
- The high-speed check is possible at 80 km/h (50 mph) or higher.

6. READ DTC
(a) Stop the vehicle and the warning light will begin to blink.
(b) Using SST, connect the terminals Tc and E1 of DLC 1. SST 09843-18020






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

HINT: If normal, the warning light blinks about 2 times every 1 second.






If 2 or more malfunctions are indicated at the same time, the smallest numbered code will be displayed 1st.

7. REPAIR MALFUNCTIONING PARTS
Repair or replace the malfunctioning parts.

HINT: When repairing or replacing parts, turn the ignition switch OFF.

8. REMOVE SST
Remove the SST from terminals Tc, Ts and E1 of the DLC 1.
33T 09843-18020

DTC Of Speed Sensor Check Function:

DTC OF SPEED SENSOR CHECK FUNCTION