Electronic Engine Controls
The electronic engine controls consist of the following
- Power control module (PCM)
- Engine coolant temperature (ECT) sensor
- Camshaft position (CMP) sensor
- Fuel rail pressure and temperature sensor
- Crankshaft position (CKP) sensor
- Mass air flow (MAF) sensor
- Heated oxygen sensor (HO2S)
- Catalyst monitor sensor
- Knock sensor (KS) The PCM
- accepts input from various engine sensors to compute the fuel flow rate necessary to maintain a prescribed air/fuel ratio throughout the entire engine operational range.
- outputs a command to the fuel injectors to meter the appropriate quantity of fuel. The ECT sensor
- sends the PCM a signal indicating engine temperature.
- resistance decreases as coolant temperature increases. The CMP sensor
- provides camshaft position information which is used by the PCM for fuel synchronization. The fuel rail pressure and temperature sensor
- measures the pressure and temperature of the fuel in the fuel supply manifold and sends these signals to the PCM.
- uses intake manifold vacuum as a pressure reference. The CKP sensor
- sends the PCM a signal indicating crankshaft position.
- is essential for calculating spark timing. The MAF sensor
- uses a hot wire sensing element to measure the amount of air entering the engine. Air passing over the hot wire causes it to cool. The HO2S
- creates a voltage signal dependent on exhaust oxygen content.
- provides feedback information to the PCM used to calculate fuel delivery. The catalyst monitor sensor
- monitors oxygen content after it flows through the catalytic converter.
- provides a voltage to the PCM used to calculate catalytic converter integrity. The KS
- is used to detect engine detonation (spark knock).
- sends a voltage signal to the PCM which retards the ignition timing as necessary.
Refer to the INTRODUCTION - GASOLINE article.
Scheme 9
Fuel Rail Pressure and Temperature Sensor
| Item | Specification |
|---|---|
| Motorcraft SAE 5W-20 Premium Synthetic Blend Motor Oil XO-5W20-QSP (US); Motorcraft SAE 5W-20 Super Premium Motor Oil CXO-5W20-LSP12 (Canada); or equivalent | WSS-M2C930-A |
MATERIAL SPECIFICATIONS
Scheme 10
Engine Coolant Temperature (ECT) Sensor
| Item | Specification |
|---|---|
| Motorcraft Premium Gold Engine Coolant with Bittering Agent (US only) VC-7-B (US); CVC-7-A (Canada); or equivalent (yellow color) | WSS-M97B51-A1 |
MATERIAL SPECIFICATIONS
Scheme 11
Heated Oxygen Sensor (HO2S)
SPECIAL TOOL(S) Socket, Exhaust Gas Oxygen Sensor 303-476 (T94P-9472-A)
Scheme 12
| Item | Specification |
|---|---|
| Penetrating and Lock Lubricant XL-1 (US); CXC-51-A (Canada) | |
| High Temperature Nickel Anti-Seize Lubricant XL-2 | ESE-M12A4-A |
MATERIAL SPECIFICATIONS
Catalyst Monitor Sensor
SPECIAL TOOL(S) Socket, Exhaust Gas Oxygen Sensor 303-476 (T94P-9472-A)
| Item | Specification |
|---|---|
| Penetrating and Lock Lubricant XL-1 (US); CXC-51-A (Canada) | |
| High Temperature Nickel Anti-Seize Lubricant XL-2 | ESE-M12A4-A |
MATERIAL SPECIFICATIONS