Circuit/System Testing

P0335

1. Disconnect the CKP sensor connector.
2. Test for less than 1 ohm of resistance between low reference circuit and ground.
   • If greater than the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit and ground.
   • If less than the specified range, test the 5-volt reference circuit for an open/high resistance or short to ground. If the circuit tests normal, replace the ECM.
   • If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the ECM.
4. Ignition ON, test for 4.8-5.2 volts between the signal circuit and ground.
   • If less than the specified range, test signal circuit for an open/high resistance or short to ground. If the circuit tests normal, replace the ECM.
   • If greater than the specified range, test signal circuit for a short to voltage. If the circuit tests normal, replace the ECM.
5. Ignition ON, using a jumper wire connected to ground, momentarily touch the CKP sensor signal circuit repeatedly. The CKP Active Counter parameter should increment.
   • If the CKP Active Counter parameter does not increment, replace the ECM.

P0336

1. Ignition OFF, inspect the CKP sensor for looseness and correct installation.
   • If the sensor is loose, inspect the sensor and the O-ring for damage, replace as necessary
2. Inspect the engine for the following conditions:
   • Engine oil for debris
   • Crankshaft reluctor wheel for damage
   • The timing chain, tensioner, and sprockets for wear or damage

• If debris is found in the engine oil, inspect the internal engine components to determine the cause. Repair or replace any worn or damaged components. Refer to Timing Chain and Sprockets Cleaning and Inspection and Crankshaft and Bearings Cleaning and Inspection .