T100 SR5 Extra Cab Pickup 4WD V6-3.4L (5VZ-FE) (1998)
Speedometer Head: Testing and Inspection
INSPECT SPEEDOMETER ON-VEHICLE
a. Using a speedometer tester, inspect the speedometer for allowable indication error and check the operation of the odometer.
HINT: Tire wear and tire over or under inflation will increase the indication error. If error is excessive, replace the speedometer.
b. Check the speedometer for pointer vibration and abnormal noise.
INSPECT VEHICLE SPEED SENSOR OPERATION
Check that there is continuity between terminals A and B four times for every revolution of the speedometer shaft.
If operation is not as specified, replace the speedometer.