T100 Regular Cab Pickup 2WD V6-3.4L (5VZ-FE) (1997)
Speedometer Head: Testing and Inspection
INSPECT SPEEDOMETER ON-VEHICLE
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.
Speedometer Range
If error is excessive, replace the speedometer.
INSPECT 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.