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.

If error is excessive. replace the speedometer

Standard indication Allowable range
20 18 - 24
40 38 - 44
60 58 - 66
80 78 - 88
100 98 - 110
120 118 - 132







INSPECT No.1 VEHICLE SPEED SENSOR OPERATION
1. Connect the positive (+) lead from battery to terminal 1 and negative (-) lead to terminal 2.
2. Connect the positive (+) lead from tester to terminal 3 and negative (-) lead to terminal 2.
3. Revolve shaft.
4. Check that there is voltage changer from approx. 0 V to 11 V or more between terminals 3 and 2.

HINT: The voltage change should be 4 times per each revolution of the No.1 vehicle speed sensor shaft.

If operation is not as specified. replace the sensor.