Speed Sensor

Check Connector:

Sensor Level Test:

Sensor Change Test:

Diagnostic Code Reading:

PRETEST PROCEDURE

1. Connect the E1, Tc, and Ts terminals of the check connector.
2. Put the parking brake on and start the engine.
CAUTION: The brake pedal should not be pressed at this time.
3. Make sure that the warning light blinks about 4 times a second.


SENSOR LEVEL TEST

After performing the PRETEST PROCEDURE above, drive the vehicle at about 2.5-3.7 mph in a straight line. The warning light should turn on after a one second delay. If the warning light turns on while the vehicle is within the specified speed range, the check is completed.

NOTE: When the vehicle speed exceeds 3.7 mph and the warning light blinks again, the speed sensors are OK.

If while driving at speeds above or below 2.5-3.7 mph, the warning light should turn on without blinking. Go to READING DIAGNOSTIC CODES below to find the defective part and repair or replace it.


SENSOR SIGNAL CHANGE TEST

While driving the vehicle at about 28.0-34.2 mph in a straight line, the warning light should turn on after a one second delay. If the warning light turns on while the vehicle is within the specified speed range, the check is completed.
NOTE: When the vehicle speed is not within the specified range and the warning light blinks again, the sensor rotors are OK.

If while driving at speeds above or below 28.0-34.2 mph, the warning light should turn on without blinking. Go to READING DIAGNOSTIC CODES below to find the defective part and repair or replace it.


READING DIAGNOSTIC CODES

Read the diagnostic codes after you stop the engine, the warning light will start to blink codes. The diagnostic codes can be read by counting the number of times that the warning light flashes and the time between flashes. Codes are separated by a 2.5-4.0 second delay, the digits in the two digit code are .5 seconds each and are separated from each other by an 1.5 second delay.