Schematic Reference: Engine Controls Schematics

The crankshaft position (CKP) sensor is a magnetic generator type sensor, producing an alternating current signal which increases in both frequency and amplitude as the engine RPM increases. The CKP sensor sends this reference signal to the powertrain control module (PCM) to indicate RPM and crankshaft position. This reference signal along with the camshaft position sensor signal is used by the PCM to calculate fuel injection pulse, establish top dead center for ignition timing and where to start ignition coil and injection sequencing.

Engine speed is greater than 1,000 RPM.

Crankshaft position (CKP) sensor input is not detected for over 50 ms while the engine is running.

A DTC P1335 can be the result of a defective reluctor wheel. Remove crankshaft sensor and inspect reluctor wheel through sensor hole. Check for the condition of the reluctor wheel for porosity, nicks, dents etc. and repair as necessary.

An intermittent malfunction may be caused by a fault in the CKP sensor electrical circuit. Inspect the wiring harness and components for any of the following conditions:

Repair any electrical circuit faults that were found. Refer to Wiring Repairs in Wiring Systems.

The information included in the Freeze Frame data can be useful in determining the vehicle operating conditions when the DTC first set.

The numbers below refer to the step numbers in the Diagnostic Table.

1. The OBD System Check prompts the technician to complete some basic checks and store the freeze frame data on the scan tool if applicable. This creates an electronic copy of the data taken when the fault occurred. The information is then stored in the scan tool for later reference.

2. This step checks whether DTC P1335 is the result of a hard failure or an intermittent condition. If engine will not start, crank engine over (3 consecutive ignition cycles).

3. This step is checking the internal resistance of the crankshaft position sensor tests if the CKP sensors windings are opened or shorted.

4. Using a DMM, measure resistance of the wires from PCM connector to CKP connector (harness side), if the DMM reads higher than 0.5 ohms check for a short or high resistance in the circuit. Also using a test light connected to ground with both PCM and CKP connectors unplugged, probe each connector terminal, this will check whether there is a short to battery voltage.