Circuit/System Testing

P0335

1. Ignition OFF, disconnect the harness connector at the crankshaft position (CKP) sensor.
2. Test for less than 1 ohms of resistance between the CKP low reference circuit terminal B 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 CKP 5-volt reference circuit terminal C 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 short to voltage. If the circuit tests normal, replace the ECM.
4. Ignition ON, test for 4.8-5.2 volts between the CKP signal circuit terminal A and ground.
   • If less than the specified range, test the 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 the signal circuit for a short to voltage. If the circuit tests normal, replace the ECM.
5. Ignition OFF, connect a fused jumper wire to the CKP signal circuit terminal A.
6. Ignition ON, momentarily touch the other the other end of the fused jumper wire to the battery negative post. The CKP Active counter parameter should increment.
   • If the CKP active counter increments, replace the CKP sensor.
   • If the CKP active counter does not increment, replace the ECM.

P0336

1. Ignition OFF, inspect the CKP sensor for correct installation.
   • If the CKP 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
   • Timing chain, tensioner, and sprockets for wear or damage

• If debris is found in the engine oil, inspect the engine components to determine the cause. Refer to Timing Chain and Sprockets Cleaning and Inspection .
• If any parts are worn or damaged, replace as necessary.