Supra L6-2997cc 3.0L DOHC MFI (1998)
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.
INSPECT VEHICLE SPEED SENSOR OPERATION
a. Connect the positive (+) lead from battery to terminal 1 and negative (-) lead to terminal 2.
b. Connect the positive (+) lead from tester to terminal 3 and negative (-) lead to terminal 2.
c. Rotate shaft.
d. Check that there is voltage change from approx. 0 V to 11 V or more between terminals 2 and 3.
HINT: The voltage change should be 4 times for every revolution of the speed sensor shaft.
If operation is not as specified, replace the sensor
