P0390-CAMSHAFT POSITION SENSOR CIRCUIT - BANK 2 SENSOR 2

P0390-CAMSHAFT POSITION SENSOR CIRCUIT - BANK 2 SENSOR 2

For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

The 3.6L has four separate Camshafts that the Powertrain Control Module (PCM) requires positional information from. There are two Camshaft Position (CMP) Sensors on the 3.6L, each CMP Sensor consists of four circuits. The sensors are located on the top end of each valve cover, closest to the transmission side of the engine. The CMP Sensor is an integrated circuit sensing device and on the end of each Camshaft is a magnetic encoder that is programmed with a magnetic pattern. The PCM provides a 5-Volt supply and a sensor ground circuit to the CMP Sensor and the CMP Sensor provides two Camshaft positional signals, the intake and exhaust camshaft position, to the PCM. The sensor detects the magnetically encoded information, a series of magnetic peaks and valleys, from the encoder. As each Camshaft rotates, the magnetic encoded pattern passes by the CMP Sensor creating a changing magnetic field at the sensor face. The changing magnetic field is interpreted by the sensor electronics and a digital output, ON/OFF or HIGH/LOW pattern, is produced. The length of the pulse widths generated by the CMP varies in size based on the velocity of the Camshaft. The PCM decodes the digital pattern to identify the Camshaft position. The information from each individual Camshaft along with the Crankshaft information is used to control and sequence the Variable Valve Timing (VVT) system and fuel injection events.

• When Monitored:

  During engine cranking and with the engine running. Battery voltage greater than 10.0 volts.

• Set Condition:

  At least five seconds or 2.5 engine revolutions have elapsed with Crankshaft Position Sensor signals present but no camshaft position sensor signal. One Trip Fault. Three good trips to turn off the MIL. If the vehicle is equipped with the stop/start feature, the system will be disabled when this DTC is active.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

1. ACTIVE DTC

• Go To 2

• Go To 14

2. (F856) 5-VOLT SUPPLY CIRCUIT

• Go To 3

• Go To 10
  

3. (K445) CMP SENSOR SIGNAL 2/2 CIRCUIT

• Go To 4

• Go To 7
  

4. (K900) SENSOR GROUND CIRCUIT OPEN

• Go To 5

• Repair the open in the (K900) Sensor ground circuit.
• Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
  

5. (K445) CMP SENSOR SIGNAL 2/2 CIRCUIT SHORTED TO THE (F856) 5-VOLT SUPPLY CIRCUIT

• Repair the short between the (K445) CMP Sensor Signal 2/2 circuit and the (F856) 5-Volt Supply circuit.
• Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

• Go To 6
  

6. CAMSHAFT POSITION SENSOR

• Verify that there is good pin to terminal contact in the CMP Sensor and Powertrain Control Module connectors. Replace the Camshaft Position Sensor 2 if no problems were found with the connectors. (Refer to 08 - Electrical/8I - Ignition Control/SENSOR, Camshaft Position - Removal) .
• Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

7. (K445) CMP SENSOR SIGNAL 2/2 CIRCUIT SHORTED TO VOLTAGE

• Repair the short to voltage in the (K445) CMP Sensor Signal 2/2 circuit.
• Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

• Go To 8
  

8. (K445) CMP SENSOR SIGNAL 2/2 CIRCUIT OPEN OR EXCESSIVE RESISTANCE

• Go To 9

• Repair the open in the (K445) CMP Sensor Signal 2/2 circuit.
• Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
  

9. (K445) CMP SENSOR SIGNAL 2/2 CIRCUIT SHORTED TO GROUND

• Repair the short to ground in the (K445) CMP Sensor Signal 2/2 circuit.
• Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

• Go To 10
  

10. (F856) 5-VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE

• Repair the short to voltage in the (F856) 5-Volt Supply circuit.
• Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

• Go To 11
  

11. (F856) 5-VOLT SUPPLY CIRCUIT OPEN

• Go To 12

• Repair the open in the (F856) 5-Volt Supply circuit.
• Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
  

12. (F856) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND

• Repair the short to ground in the (F856) 5-Volt Supply circuit.
• Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

• Go To 13
  

13. POWERTRAIN CONTROL MODULE (PCM)

• Repair as necessary.
• Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

• Replace and program the Powertrain Control Module in accordance with the Service Information. (Refer to 08 - Electrical/8E - Electronic Control Modules/MODULE, Powertrain Control - Removal) .
• Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

14. ERRATIC CMP SIGNAL

• Verify that there is good pin to terminal contact in the CMP Sensor and the Powertrain Control Module connectors. If OK, replace the Camshaft Position Sensor. (Refer to 08 - Electrical/8I - Ignition Control/SENSOR, Camshaft Position - Removal) .
• Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

• Go To 15

15. ERRATIC CKP SIGNAL

• Verify that there is good pin to terminal contact in the CKP Sensor and the Powertrain Control Module connectors. If OK, replace the Crankshaft Position Sensor. (Refer to 14 - Fuel System/Fuel Injection/SENSOR, Crankshaft Position - Removal) .
• Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

• Test complete, the conditions that set this DTC are not present at this time. Using the wiring diagram as a guide, check all related splices and connections for signs of water intrusion, corrosion, pushed out or bent terminals and correct pin tension.