Speed Sensor
Disconnect speedometer cable at transmission. Disconnect computer or speed marker connector and connect ohmmeter as shown in illustration. Turn cable by hand and count number of on-off cycles per each revolution of speedometer cable. If number of cycles is not correct (see Fig 1) replace speedometer.
NOTE:
On Land Cruiser models, connections should be as shown for Corolla, Carina, etc. but reading should be six cycles.