Crankshaft Position Sensor Malfunction

OPERATION
The fail-safe mode operation starts as soon as all of the following conditions occur:
^ No 90° signal pulse (reference signal) is detected for several seconds, or 1°signal (position signal) is equivalent to 0 rpm.
^ The start signal was input continuously for more than several seconds.
^ The battery voltage is higher than 10 Volts DC.
^ The inhibitor switch is in the "P" or "N" position.
^ The computing function of the ECCS Control Module was judged faulty.
When the crankshaft position sensor fail-safe system activates, the Malfunction Indicator Lamp on the instrument panel lights to warn the driver.

ENGINE CONTROL-SYSTEM OPERATION
The crankshaft position sensor has a sub-camshaft position sensor. When the crankshaft position sensor fail-safe system activates, the sub-camshaft position sensor substitutes for the main one. At this time, engine speed will not rise over 3,000 rpm.

CANCELLATION
Activation of the fail-safe system is canceled each time the ignition switch is turned OFF. The system is reactivated if all of the activating conditions are satisfied after turning the ignition switch from OFF to ON.