Circuit/System Testing

P0340

1. Ignition OFF, disconnect the harness connector at the camshaft position (CMP) sensor.
2. Test for less than 1 ohm of resistance on the CMP 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 CMP 5-volt reference circuit terminal A 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 CMP signal circuit terminal C 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 CMP signal circuit terminal C.
6. Ignition ON, momentarily touch the other the other end of the fused jumper wire to the battery negative post. The CMP Active counter parameter should increment.
   • If the CMP active counter increments, replace the CMP sensor.
   • If the CMP active counter does not increment, replace the ECM.

P0341

1. Ignition OFF, inspect the CMP sensor for correct installation.
   • If the CMP sensor is loose, inspect the sensor and the O-ring for damaged, replace as necessary.
2. Inspect the engine for the following conditions:
   • Engine oil for debris
   • Camshaft reluctor wheel for damage
   • The timing chain, 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 root cause. Repair or replace any worn or damaged components. Refer to Timing Chain and Sprockets Cleaning and Inspection (First Design) or Timing Chain and Sprockets Cleaning and Inspection (Second Design) .