P0365
DTC P0340, P0345, P0365, or P0390
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0340
- Intake Camshaft Position (CMP) Sensor Circuit Bank 1
DTC P0345
- Intake Camshaft Position (CMP) Sensor Circuit Bank 2
DTC P0365
- Exhaust Camshaft Position (CMP) Sensor Circuit Bank 1
DTC P0390
- Exhaust Camshaft Position (CMP) Sensor Circuit Bank 2
Diagnostic Fault Information
Circuit/System Description
The 4X camshaft position (CMP) sensor circuits consist of an engine control module (ECM) supplied 5-volt reference circuit, low reference circuit, and an output signal circuit. The CMP sensor is an internally magnetic biased digital output integrated circuit sensing device. The sensor detects magnetic flux changes of the teeth and slots of a 4-tooth reluctor wheel attached to the camshaft. As each reluctor wheel tooth rotates past the CMP sensor, the resulting change in the magnetic field is used by the sensor electronics to produce a digital output pulse. The sensor returns a digital ON/OFF DC voltage pulse of varying frequency, with 2 narrow, and 2 wide output pulses per camshaft revolution that represent an image of the camshaft reluctor wheel. The frequency of the CMP sensor output depends on the velocity of the camshaft. The ECM decodes the narrow and wide tooth pattern to identify camshaft position. This information is then used to sequence the ignition timing and fuel injection events of the engine. The ECM also uses CMP sensor output information to determine the camshaft relative position to the crankshaft, to control the CMP actuator if equipped, and for limp-home operation.
Conditions for Running the DTC
* The engine is running.
* DTC P0641 is not set.
* These DTCs run continuously when the above conditions are met.
Conditions for Setting the DTC
* The ECM detects that the starter is commanded on and the engine has been cranking, and rotation detected, for more than 4 seconds without a CMP sensor pulse.
* The ECM detects that the engine is rotating, but did not receive a CMP sensor pulse during the first engine cycle.
* The ECM detects that the engine is running but did not receive a CMP sensor pulse for 3 seconds.
* The ECM detects that the engine is rotating but did not receive a CMP sensor pulse during any 100 engine cycles.
Action Taken When the DTC Sets
* DTCs P0340, P0345, P0365, and P0390 are Type B DTCs.
* The CMP actuator is commanded to the parked position.
* A fault on one intake CMP sensor will park both intake camshaft actuators. A fault on one exhaust CMP sensor will park both exhaust camshaft actuators.
Conditions for Clearing the DTC
DTCs P0340, P0345, P0365, and P0390 are Type B DTCs.
Diagnostic Aids
With a DTC set, the engine may crank for an extended period of time during start-up.
Reference Information
Schematic Reference
Engine Controls Schematics (Electrical Diagrams)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
Electronic Ignition (EI) System Description (Electronic Ignition (EI) System Description)
Electrical Information Reference
* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Diagnostic Trouble Code Descriptions)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
Special Tools
J 35616 Connector Test Adapter Kit
Circuit/System Verification
1. Ignition OFF, inspect the engine wiring harness carrying the CMP sensor circuits for the following conditions:
* Close routing of aftermarket electrical equipment
* Close to solenoids, motors, and relays
• Correct any wire harness routing or component placement conditions, if it is determined to be a possible source of electrical interference.
2. Observe that the following parameters are all incrementing:
* Exhaust CMP Bank 1 Active
* Intake CMP Bank 1 Active
* Exhaust CMP Bank 2 Active
* Intake CMP Bank 2 Active
3. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
Circuit/System Testing
1. Ignition OFF, disconnect the appropriate camshaft position (CMP) sensor wire harness connector.
2. Test for less than 1 ohm of resistance between 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 test 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, on the CMP sensor harness connector.
6. Ignition ON, momentarily touch the other the other end of the fused jumper wire to ground. The CMP active counter parameter on the scan tool, should increment by multiple counts with each individual grounding.
• If the CMP active counter increments, replace the CMP sensor.
• If the CMP active counter does not increment, replace the ECM.
Component Testing
Important: You must perform the Circuit/System Testing before proceeding with Component Testing.
1. Inspect the CMP sensor for correct installation. Remove the CMP sensor from the engine and inspect the sensor O-ring for damage.
• If the sensor is loose, incorrectly installed, or damaged, replace the CMP sensor.
2. Connect the CMP sensor harness connector to the CMP sensor.
3. Ignition ON, engine OFF. Observe the CMP Active Counter parameter on the scan tool.
4. Pass a flat steel object repeatedly across the tip of the sensor that faces the reluctor wheel. The CMP Active Counter parameter should increment with each pass of the steel object.
• If the parameter does not increment, replace the CMP sensor.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Camshaft Position Sensor Replacement - Bank 2 (Left Side) Exhaust (Service and Repair)
* Camshaft Position Sensor Replacement - Bank 2 (Left Side) Intake (Service and Repair)
* Camshaft Position Sensor Replacement - Bank 1 (Right Side) Exhaust (Service and Repair)
* Camshaft Position Sensor Replacement - Bank 1 (Right Side) Intake (Service and Repair)
* Control Module References (Programming and Relearning) for ECM replacement, setup, and programming.