Electronic Engine Control - 2.5L - (Except Hybrid): Other Ford Escape II

Electronic Engine Controls

The electronic engine controls consist of the following

1. PCM
2. Camshaft Position (CMP) sensor
3. Crankshaft Position (CKP) sensor
4. Mass Air Flow (MAF) sensor
5. Heated Oxygen Sensor (HO2S)
6. Catalyst Monitor Sensor (CMS)
7. Cylinder Head Temperature (CHT) sensor
8. Knock Sensor (KS)
9. Variable Camshaft Timing (VCT) oil control solenoid
10. Manifold Absolute Pressure (MAP) sensor

The PCM

1. 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.
2. outputs a command to the fuel injectors to meter the appropriate quantity of fuel.

The CMP sensor

1. sends the PCM a signal indicating camshaft position used for fuel synchronization.

The CKP sensor

1. sends the PCM a signal indicating crankshaft position.
2. is essential for calculating spark timing.

The MAF sensor

1. 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

1. creates a voltage signal dependent on exhaust oxygen content.
2. provides feedback information to the PCM used to calculate fuel delivery.

The CMS

1. monitors oxygen content after it flows through the catalytic converter.
2. provides feedback information to the PCM used to calculate fuel delivery.

The CHT sensor

1. sends the PCM a signal indicating cylinder head temperature.
2. resistance decreases as coolant temperature increases.

The KS

1. is used to detect engine detonation.
2. sends a voltage signal to the PCM.
3. is able to provide a signal which retards the ignition timing, as necessary.

The VCT oil control solenoid

1. is an electrically controlled hydraulic valve that directs engine oil to the variable camshaft. Once the PCM transmits a signal, the solenoid moves a valve spool, directing oil into the camshaft phaser cavity. This action changes valve timing by either inducing an advance or retard condition. The camshaft is, thereby repositioned in relation to crankshaft timing and allows for optimum engine performance and lower emissions.

The MAP sensor

1. measures manifold vacuum and converts it to an electrical signal. This provides the PCM information on engine load.

Refer to the INTRODUCTION - GASOLINE MODELS .

Material

MATERIAL SPECIFICATIONS

Scheme 27

PART NUMBER DESCRIPTION

General Equipment

GENERAL EQUIPMENT

Scheme 28

PART NUMBER DESCRIPTION

Scheme 29

Scheme 30

Scheme 31

1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to «JACKING & LIFTING»(ref-344051) .
2. Remove the 5 bolts, the pin-type retainer (not shown) and the RH splash shield.
3. Turn the crankshaft clockwise until the hole in the crankshaft pulley is in the 3 o'clock position.
4. Remove the engine plug bolt.
5. Install the Crankshaft TDC Timing Peg and turn the crankshaft clockwise until the crankshaft contacts the Crankshaft TDC Timing Peg.
6. Disconnect the Crankshaft Position (CKP) sensor electrical connector.
7. Remove the bolts and the CKP sensor.

Scheme 32

Scheme 33

Scheme 34

1. Install a 6 mm x 18 mm bolt through the crankshaft pulley and thread it into the front cover.
2. Install the CKP sensor and the 2 bolts. Do not tighten the bolts at this time.
3. Adjust the CKP sensor with the Crankshaft Sensor Aligner. Tighten the 2 bolts to 7 Nm (62 lb-in).
4. Connect the CKP sensor electrical connector.
5. Remove the 6 mm x 18 mm bolt from the crankshaft pulley.
6. Install the engine plug bolt. Tighten to 20 Nm (177 lb-in).
7. Install the RH splash shield, 5 bolts and the pin-type retainer (not shown). Tighten to 9 Nm (80 lb-in).
8. Using the scan tool, perform the Misfire Monitor Neutral Profile Correction procedure, following the on-screen instructions.

MATERIAL SPECIFICATIONS

Scheme 35

Scheme 36

1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to «JACKING & LIFTING»(ref-344051).
2. Disconnect the Heated Oxygen Sensor (HO2S) electrical connector.
3. Using the Exhaust Gas Oxygen Sensor Socket, remove the HO2S. Calculate the correct torque wrench setting for the following torque. Refer to the see scheme 14. To install, tighten to 48 Nm (35 lb-ft).
4. To install, reverse the removal procedure.

MATERIAL SPECIFICATIONS

Scheme 37

1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to «JACKING & LIFTING»(ref-344051).
2. Disconnect the Catalyst Monitor Sensor (CMS) electrical connector.
3. Using the Exhaust Gas Oxygen Sensor Socket, remove the CMS. Calculate the correct torque wrench setting for the following torque. Refer to the (Scheme 35). To install, tighten to 48 Nm (35 lb-ft).
4. To install, reverse the removal procedure.

Scheme 38

PART NUMBER DESCRIPTION

MATERIAL SPECIFICATIONS

Scheme 39

PART NUMBER DESCRIPTION