Dodge Ram Camshaft Position Sensor

Have questions about the camshaft position sensor, download the service manual for all the answers. The manual includes step-by-step procedures, diagrams, illustrations and all the technical info you need.

CAMSHAFT POSITION - SENSOR

DESCRIPTION

3.7L V-6

The Camshaft Position Sensor (CMP) on the 3.7L 6-cylinder engine is bolted to the right-front side see service manual for location.

4.7L V-8 - The Camshaft Position Sensor (CMP) on the 4.7L V-8 engine is bolted to the right-front side of the view repair manual for where it is.

5.7L V-8 - The Camshaft Position Sensor (CMP) on the 5.7L V-8 engine is located near the generator by the timing chain / case cover on the "refer to diagram on engine" of engine.

5.9L Diesel - The Camshaft Position Sensor (CMP) on the 5.9L diesel engine is located below the fuel injection pump. It is bolted to the back of the refer to manual cover.

5.9L V-8 Gas - The Camshaft Position Sensor (CMP) on the 5.9L V-8 engine is located inside refer to manual.

8.0L V–10 - The Camshaft Position Sensor (CMP) on the 8.0L V-10 engine is located on the see manual for location on engine.

OPERATION 3.7L V-6

The Camshaft Position Sensor (CMP) sensor on the 3.7L V-6 engine contains a hall effect device referred to as a sync signal generator. A rotating target wheel (tonewheel) for the CMP is located at the front of the camshaft for the right cylinder head (Fig. 6) in service manual. This sync signal generator detects notches located on a tonewheel. As the tonewheel rotates, the notches pass through the sync signal generator. The signal from the CMP sensor is used in conjunction with the Crankshaft Position Sensor (CKP) to differentiate between fuel injection and spark events. It is also
used to synchronize the fuel injectors with their respective cylinders.

When the leading edge of the tonewheel notch enters the tip of the CMP, the interruption of magnetic field causes the voltage to switch high, resulting in a sync signal of approximately 5 volts. When the trailing edge of the tonewheel notch leaves then tip of the CMP, the change of the magnetic field causes the sync signal voltage to switch low to 0 volts.

4.7L V-8

The CMP sensor on the 4.7L engine contains a hall effect device called a sync signal generator to generate a fuel sync signal. This sync signal generator detects notches located on a tonewheel. The tonewheel is located at the front of the camshaft for the right cylinder head. As the tonewheel rotates, the notches pass through the sync signal generator. The pattern of the notches (viewed counter-clockwise from front of engine) is: 1 notch, 2 notches, 3 notches. The signal from the CMP sensor is used in conjunction with the crankshaft position sensor to differentiate between fuel injection and spark events. It is also used to synchronize the fuel injectors with their respective cylinders.

5.7L V-8

The CMP sensor is used in conjunction with the crankshaft position sensor to differentiate between fuel injection and spark events. It is also used to synchronize the fuel injectors with their respective cylinders. The sensor generates electrical pulses. These pulses (signals) are sent to the Powertrain Control Module (PCM). The PCM will then determine crankshaft position from both the camshaft position sensor and crankshaft position sensor. The tonewheel is located at the front of the camshaft. As the tonewheel rotates, notches pass through the sync signal generator.

When the cam gear is rotating, the sensor will detect the notches. Input voltage from the sensor to the PCM will then switch from a low(approximately 0.3 volts) to a high (approximately 5 volts). When the sensor detects a notch has passed, the input voltage switches back low to approximately 0.3 volts.

5.9L V-8 Gas

The CMP sensor on the 5.9L V-8 engine contains a hall effect device called a sync signal generator to generate a fuel sync signal. This sync signal generator detects a rotating pulse ring (shutter) on the distributor shaft. The pulse ring rotates 180 degrees through the sync signal generator. Its signal is used in conjunction with the Crankshaft Position (CKP) sensor to differentiate between fuel injection and spark events. It is also used to synchronize the fuel injectors with their respective cylinders. When the leading edge of the pulse ring (shutter) enters the sync signal generator, the following occurs: The interruption of magnetic field causes the voltage to switch high resulting in a sync signal of approximately 5 volts. When the trailing edge of the pulse ring (shutter) leaves the sync signal generator, the following occurs: The change of the magnetic field causes the sync signal voltage to switch low to 0 volts.

5.9L Diesel

The Camshaft Position Sensor (CMP) contains a hall effect device. A rotating target wheel (tonewheel) for the CMP is located on the front timing gear. This hall effect device detects notches located on the tonewheel. As the tonewheel rotates, the notches pass the tip of the CMP. When the leading edge of the tonewheel notch passes the tip of the CMP, the following occurs: The interruption of magnetic field causes the voltage to switch high resulting in a signal of approximately 5 volts. When the trailing edge of the tonewheel notch passes the tip of the CMP, the following occurs: The
change of the magnetic field causes the signal voltage to switch low to 0 volts. The CMP provides a signal to the Engine Control Module (ECM) at all times when the engine is running. The ECM uses the CMP information primarily on engine start-up. Once the engine is running, the ECM uses the CMP as a backup sensor for engine speed. The Crankshaft Position Sensor (CKP) is the primary engine speed indicator for the engine after the engine is running.

8.0L V-10

The CMP sensor is used in conjunction with the crankshaft position sensor to differentiate between fuel injection and spark events. It is also used to synchronize the fuel injectors with their respective cylinders. The sensor generates electrical pulses. These pulses (signals) are sent to the Powertrain Control Module (PCM). The PCM will then determine crankshaft position from both the camshaft position sensor and crankshaft position sensor. A low and high area are machined into the camshaft drive gear. The sensor is positioned in the timing gear cover so that a small air gap exists between the face of sensor and the high machined area of cam gear.


1 - SYNC SIGNAL GENERATOR
2 - CAMSHAFT POSITION SENSOR
3 - PULSE RING
4 - DISTRIBUTOR ASSEMBLY
1 - CMP
2 - FUEL INJECTION PUMP (BOTTOM)
3 - ELECTRONIC CONTROL MODULE (ECM)
4 - ECM ELEC. CONNECTOR
5 - CMP ELEC. CONNECTOR
6 - CMP MOUNTING BOLT
7 - BACK OF TIMING GEAR COVER

Searches:

Dodge Ram Truck Repair Questions and Answers.

  • Where is the crankshaft position sensor located on a 2003 Dodge Ram 1500?
  • 2003 Dodge Ram 1500 Crankshaft Position Sensor - Replacement.
  •  I have a 2003 Dodge Ram 4.7L My check engine light came on.
  • 2003 DODGE PICKUP RAM 1500 Camshaft Position Sensor.
  • 2003 Dodge Ram 1500 Hemi engine and the motor will turn over but wont start.
  • Need to know where the camshaft position sensor is located on an 2001 1500 dodge ram.
  • CAMSHAFT POSITION SENSOR 2001 Dodge Truck RAM 1500.
  • How do you change the crank position sensor for a 2001 Dodge Ram 1500 Pickup?
  • How to Replace a Crankshaft Position Sensor for a 2001Doder Ram Truck?
  • How do you change a camshaft sensor on a 2002 Dodge ram 1500?
  • 3.7L V6 and 4.7L V8 Camshaft position sensor failure.
  • Can a camshaft position sensor failure cause the engine to crank but not start?
  • 2002 Dodge Ram 1500 Crank Position Sensor 4.7L V8.

Dodge Ram Truck Models & Years Covered in Each of the above Service Manuals:

2001 Dodge Ram 1500, 2500 & 3500 Service Manual for: 3.9 L 6 cyl. MPI Gasoline (5.9L),  5.2 L 8 cyl. MPI Gasoline (5.2L), 5.2 L 8 cyl. (CNG) (5.2L), 5.9 L 8 cyl. MPI Gasoline, 5.9 L 8 cyl. MPI Gasoline (Heavy Duty) (5.9L), 5.9 L 6 cyl. Turbo Diesel (5.9L), 8.0 L 10 cyl. MPI Gasoline (8.0L) Models.

2002 Dodge Ram 1500, 2500 & 3500 Service Manual for: 3.7L 6 cyl. MPI Gasoline  3.7 L, 4.7L 8 cyl. MPI Gasoline  4.7 L, 5.7L 8 cyl. SMPI Gasoline  5.7 L, 5.9L 6 cyl. Turbo Diesel 5.9 L
5.9L 6 cyl. Turbo Diesel High Output 5.9 L, 8.0L 10 cyl. MPI Gasoline 8.0 L, 5.9L 8 cyl. SMPI Gasoline Light Duty 5.9 L Models

2003 Dodge Ram 1500, 2500 & 3500 Service : 3.7L 6 cyl. MPI Gasoline, 4.7L 8 cyl. MPI Gasoline, 5.7L 8 cyl. SMPI Gasoline, 5.9L 6 cyl. Turbo Diesel, 5.9L 6 cyl. Turbo Diesel High Output, 8.0L 10 cyl. MPI Gasoline, 5.9L 8 cyl. SMPI Gasoline Light Duty Models.

2004 Dodge Ram 1500, 2500 & 3500 Service : 3.7L 6 cyl. MPI Gasoline, 4.7L 8 cyl. MPI Gasoline, 5.7L 8 cyl. SMPI Gasoline, 5.9L 6 cyl. Turbo Diesel, 5.9L 6 cyl. Turbo Diesel High Output, 8.0L 10 cyl. MPI Gasoline, 5.9L 8 cyl. SMPI Gasoline Light Duty Models.

2005 Dodge Ram Service Manual Application: 2005 Ram 1500 2500 3500 3.7L 6 cyl. MPI Gasoline, 4.7L 8 cyl. MPI Gasoline, 5.7L 8 cyl. SMPI Gasoline, 5.9L 6 cyl. Turbo Diesel 24v, 5.9L 6 cyl. Turbo Diesel High Output Trucks.

2006 Dodge Ram Service Manual Application: 2006 Ram 1500 2500 3500 3.7L 6 cyl. MPI Gasoline, 4.7L 8 cyl. MPI Gasoline, 4.7L 8 cyl. Flex Fuel, 5.7L 8 cyl. SMPI Gasoline, 5.9L 6 cyl. Turbo Diesel High Output, 8.3L 10 cyl. SFI Gasoline Trucks.

2007 Dodge Ram Service Manual Application: 2007 Ram 1500 2500 3500 3.7L 6 cyl. MPI Gasoline, 4.7L 8 cyl. MPI Gasoline, 4.7L 8 cyl. Flex Fuel, 5.7L 8 cyl. SMPI Gasoline, 5.9L 6 cyl. Turbo Diesel High Output, 8.3L 10 cyl. SFI Gasoline Trucks.

2008 Dodge Ram Service Manual Application: 2008 Ram 1500 2500 3500 3.7L 6 cyl. MPI Gasoline, 4.7L 8 cyl. MPI Gasoline, 4.7L 8 cyl. Flex Fuel, 5.7L 8 cyl. SMPI Gasoline, 5.9L 6 cyl. Turbo Diesel High Output, 8.3L 10 cyl. SFI Gasoline Trucks.