Celica ST Ltd Ed Liftback L4-1762cc 1.8L DOHC MFI (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.
If error is excessive, replace the speedometer.
INSPECT 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. Rotate shaft.
4. 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.
