What are the voltage readings for crank sensor on a 1995 Toyota Camry?

Answer 1

On a 95 Camry with a 2.2 L (4 CYL) engine, the crankshaft position sensor is in the distributor. It generates its own voltage signal when the engine is turning. The ECM uses this signal, along with a signal from the cam position sensor (also in the distributor) as a reference to determine when to send a signal to the igniter (mounted on left strut mount). The igniter uses this digital signal from the ECM to open and close the ignition coil primary circuit, thus creating the spark to ignite the air fuel mixture. The voltage coming directly out of the crank position sensor should be an AC signal about .5 volts maximum during cranking and up to 1.0 volts with engine idling. It would be very difficult to determine this with a voltmeter; you really should use a lab scope. However, a good test you can do with a multimeter is measure the resistance across the two crank position sensor terminals with the connector disconnected. It should have between 370-650 ohms. If the sensor is open, shorted, or has excessive resistance, it should be replaced.