Pulsar L4-1597cc 1.6L SOHC (GA16i) (1990)
Vehicle Speed Sensor: Component Tests and General Diagnostics
Speed Sensor Test
1.
Remove instrument cluster.
2.
Disconnect the speedometer cable.
3.
Using an ohm meter, check continuity across terminals while turning sensor with a small screwdriver.
Continuity should open and close twice per revolution.
Replace sensor if it fails the above test.