Deceleration Sensor Operation/Check

DECELERATION SENSOR AND SPEED SENSOR DIAGNOSIS

PRECAUTION

While checking the deceleration sensor and speed sensor diagnosis system, the Rear - Wheel Anti - Lock Brake System does not work and brake system works as a normal brake system.

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





2. CHECK THAT WARNING LIGHT TURNS ON
(a) Turn the ignition switch to ON.
(b) Check that the "REAR ANTI-LOCK" warning light turns on for about 3 seconds.
If not, inspect and repair or replace the fuse, bulb and wire harness.
(c) Check that the "REAR ANTI-LOCK" warning light turns off.
(d) Turn the ignition switch to OFF.

3. PERFORM FOLLOWING STEPS





(a) Using SST, connect terminals Ts to E1 of the DLC1.
SST 09843 - 18020
(b) Start the engine.





(c) Check that the warning light blinks about 4 times every 1 second.

(d) Drive the vehicle straight ahead at about 20 km/h (12.4 mph) or more, depress the brake pedal strongly





(e) Check that the warning light turns on while braking.
(f) Drive the vehicle straight ahead at about 50/kh1 mph) or more, and stop the vehicle.





(g) Using SST, connect terminals Tc and E1 of the DLC1. SST 09843-18020





(h) Check that the warning light shows the normal code.





(i) In event of a malfunction, 2.5 seconds later the warning light will begin to blink. Read the number of blinks.
(See: TROUBLE CODE DESCRIPTIONS)

HINT: The 1St number of blinks will equal the 1st digit of a 2 digit diagnostic trouble code. After a 1.5 seconds pause. the 2nd number of blinks will equal the 2nd number of a 2 digit code. If there are 2 or more codes, there will be a 2.5 seconds pause between each, and indication will begin after 2.5 seconds pause from the smaller value and continue in order up to the larger value.





(j) If the system is operating normally (no malfunction), the warning light will blink once every 0.5 seconds.
(k) Repair the system.
(l) After the malfunctioning component has been repaired, clear the diagnostic trouble codes stored in the ECU.
(See: HOW TO CLEAR DIAGNOSTIC TROUBLE CODES)

HINT: If you disconnect the battery cable while repairing, all diagnostic trouble codes in the ECU will erased.





(m) Remove the SST from terminals Ts, Tc and E1 of the DLC1.
SST 09843-18020

Diagnostic Trouble Codes: