Electronic Engine Controls

The electronic engine controls consist of the following:

• Camshaft Position (CMP) Sensor
• Catalyst Monitor Sensor (CMS)
• Crankshaft Position (CKP) Sensor
• Cylinder Head Temperature (CHT) Sensor
• Fuel Rail Pressure (FRP) Sensor - 3.5L Gasoline Turbocharged Direct Injection (GTDI)
• Heated Oxygen Sensor (HO2S)
• Intake Air Temperature (IAT) Sensor - 3.5L GTDI
• Knock Sensor (KS)
• Manifold Absolute Pressure (MAP)/Intake Air Temperature 2 (IAT2) Sensor - 3.5L GTDI
• Mass Air Flow (MAF) Sensor - 3.7L, 5.0L (4V) and 6.2L (2V)
• PCM
• Turbocharger Boost Pressure (TCBP)/Charge Air Cooler (CAC) Sensor - 3.5L GTDI
• Variable Camshaft Timing (VCT) Oil Control Valve - 3.5L GTDI and 3.7L
• VCT Variable Force Solenoid - 5.0L (4V) and 6.2L (2V)

The CHT sensor:

• is mounted to the wall of the cylinder head and is not connected to any coolant passages.
• sends the PCM a signal indicating cylinder head temperature.

The CKP sensor:

• is mounted to the wall of the cylinder block.
• sends the PCM a signal indicating crankshaft position and engine speed.

The CMP sensor:

• is mounted to the cylinder head.
• sends the PCM a signal indicating camshaft position.

The CMS:

• is mounted to the catalytic converter.
• sends the PCM a signal indicating oxygen content in the exhaust after the exhaust leaves the catalytic converter.

The FRP sensor (3.5L GTDI):

• is mounted to the fuel rail.
• measures the pressure of the fuel rail and sends these signals to the PCM.

The HO2S:

• is mounted to the exhaust Y-pipe.
• sends the PCM a signal indicating oxygen content in the exhaust before the exhaust enters the catalytic converter.

The IAT sensor (3.5L GTDI):

• is mounted on the Air Cleaner (ACL).
• sends the PCM a signal indicating the temperature of the air entering the engine.

The KS:

• is mounted to the wall of the cylinder block.
• sends a signal to the PCM indicating engine detonation.

The MAF sensor:

• is mounted on the ACL.
• sends the PCM a signal indicating mass airflow rate of air entering the engine.

The MAP/IAT2 Sensor (3.5L GTDI):

• is mounted on the top of the intake manifold.
• is a combination sensor.
• measures manifold pressure and converts it to an electrical signal. This provides the PCM information on engine load.
• sends the PCM a signal indicating the temperature of the air entering the cylinders after passing through the CAC.

The TCBP/CAC Sensor (3.5L GTDI only):

• is mounted to the CAC outlet tube.
• is a combination sensor.
• measures turbocharger boost pressure and sends this information to the PCM.
• measures the temperature of the charge air exiting the CAC and sends this information to the PCM.

The VCT Oil Control Valve (3.5L GTDI and 3.7L only)

• is mounted to the cylinder head.
• is an electronic solenoid that supplies force to actuate the VCT oil control valve. When the PCM transmits a signal based on the engine speed and load, the solenoid moves the VCT oil control valve activating either the advance circuit, retard circuit or hold position. The camshaft is then repositioned in relation to crankshaft timing to allow for optimum engine performance with lower emissions and reduced fuel consumption.

The VCT Variable Force Solenoid [5.0L (4V) and 6.2L (2V) only]:

• is mounted to the engine front cover.
• is an electronic solenoid that supplies force to actuate the VCT oil control valve. The PCM transmits a signal based on the engine speed and load, the solenoid will move the VCT oil control valve activating either the advance circuit, retard circuit or hold position. The camshaft is then repositioned in relation to crankshaft timing to allow for optimum engine performance with lower emissions and reduced fuel consumption.