Crankshaft Position Sensor Circuit A Range/Performance
The Crankshaft Position (CKP) sensor is a sensor designed to detect changes in a magnetic field. The control module supplies the CKP sensor a signal and ground circuits. Ignition voltage is supplied to the sensor by an independent circuit. The CKP sensor produces a magnetic field whenever the ignition is ON. The CKP sensor is mounted near a reluctor wheel that is attached to the crankshaft. When the crankshaft rotates, when the engine is cranking or running, the toothed reluctor wheel changes the magnetic field. The CKP sensor converts each change in the magnetic field into a PULSE. The number of teeth on the reluctor wheel determines how many pulses the CKP sensor detects per crankshaft rotation. The CKP sensor signal is used in order to determine the engine speed, the crankshaft position, and to detect misfire.
If the VCM does not detect a CKP signal during engine cranking for a predetermined amount of time, then this DTC will be set.
CONDITIONS FOR RUNNING THE DTC
* The engine is cranking.
* Four or more camshaft position signals are detected.
CONDITIONS FOR SETTING THE DTC
The crankshaft position sensor signal not detected for more than 0.5 second .
ACTION TAKEN WHEN THE DTC SETS
* The control module illuminates the Malfunction Indicator Lamp (MIL) if a failure is detected during 2 consecutive key cycles.
* The control module sets the DTC and records the operating conditions at the time the diagnostic failed. The failure information is stored in the scan tool Freeze Frame and Failure Records.
CONDITIONS FOR CLEARING THE MIL OR DTC
* The control module turns OFF the MIL after 3 consecutive drive trips when the test has run and passed.
* A history DTC will clear if no fault conditions have been detected for 40 warm-up cycles. A warm-up cycle occurs when the coolant temperature has risen 22°C (40°F) from the startup coolant temperature and the engine coolant reaches a temperature that is more than 70°C (158°F) during the same ignition cycle.
* Use a scan tool in order to clear the DTCs.
An intermittent may be caused by any of the following conditions:
* A poor connection
* Rubbed through wire insulation
* A broken wire inside the insulation
Thoroughly inspect any circuitry that is suspected of causing the intermittent complaint. Refer to Testing for Intermittent and Poor Connections in Diagrams.
If a repair is necessary, refer to Wiring Repairs or Connector Repairs in Diagrams.
The numbers below refer to the step numbers on the diagnostic table.
2. This step determines if the DTC P0336 is an intermittent condition.
3. This step checks the ignition positive voltage circuit to the crankshaft position sensor.
4. This step checks the crankshaft position sensor ground circuit.
5. This step checks the crankshaft position sensor.