Electronic Engine Control System Ford Taurus X I

Material

Material

TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS

Electronic Engine Controls

The electronic engine controls consist of the

1. PCM.
2. cylinder head temperature (CHT) sensor.
3. camshaft position (CMP) sensor.
4. crankshaft position (CKP) sensor.
5. mass air flow (MAF) sensor.
6. heated oxygen sensor (HO2S).
7. catalyst monitor sensor.
8. variable camshaft timing (VCT) oil control solenoid.
9. knock sensor (KS).

The PCM carries out the following functions

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 CHT sensor

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

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 catalyst monitor sensor

1. monitors oxygen content after it flows through the catalytic converter.
2. provides a voltage to the PCM used to calculate catalytic converter integrity.

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 camshaft phaser. 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.

Refer to the Introduction - Gasoline Engines article.

Camshaft Position (CMP) Sensor

Material

Scheme 1

REMOVAL AND INSTALLATION

1. Remove the air cleaner outlet pipe. For additional information, refer to «INTAKE AIR DISTRIBUTION AND FILTERING»(/ford/taurus-x/i-2007-2009/remont/removal-installation/#intake-air-distribution-system-and-filtering-system) article.
2. Disconnect the camshaft position (CMP) sensor electrical connector.
3. Remove the bolt and the CMP sensor. To install, tighten to 10 Nm (89 lb-in).
4. To install, reverse the removal procedure.

Scheme 2

1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to «JACKING AND LIFTING»(/ford/taurus-x/i-2007-2009/remont/hoistjack/#jacking-and-lifting) article.
2. Remove the LH catalytic converter. For additional information, refer to «EXHAUST SYSTEM»(/ford/taurus-x/i-2007-2009/remont/exhaust/#exhaust-system) article.
3. Remove the bolt, nut and the heat shield. To install, tighten to 10 Nm (89 lb-in).
4. Remove the rubber grommet cover.
5. Disconnect the crankshaft position (CKP) sensor electrical connector.
6. Remove the bolt and the CKP sensor. To install, tighten to 10 Nm (89 lb-in).
7. To install, reverse the removal procedure.

Scheme 3

REMOVAL

1. Retrieve the module configuration. Carry out the module configuration retrieval steps of the Programmable Module Installation procedure. For additional information, refer to «MODULE CONFIGURATION»(/ford/taurus-x/i-2007-2009/remont/communication-devices/#module-configuration-system) article.
2. Remove the cowl panel grille. For additional information, refer to «FRONT END BODY PANELS»(/ford/taurus-x/i-2007-2009/remont/exterior-body-panels/#body-system-front-end-body-panels) article.
3. Disconnect the 3 PCM electrical connectors.
4. Remove the 2 nuts and the PCM.

INSTALLATION

1. Install the PCM and the 2 nuts. Tighten to 5 Nm (44 lb-in).
2. Connect the 3 PCM electrical connectors.
3. Install the cowl panel grille. For additional information, refer to «FRONT END BODY PANELS»(/ford/taurus-x/i-2007-2009/remont/exterior-body-panels/#body-system-front-end-body-panels) article.
4. Restore the module configuration. Carry out the module configuration restore steps of the Programmable Module Installation procedure. For additional information, refer to «MODULE CONFIGURATION»(/ford/taurus-x/i-2007-2009/remont/communication-devices/#module-configuration-system) article.
5. Reprogram the passive anti-theft system (PATS). Carry out the Parameter Reset procedure. For additional information, refer to «ANTI-THEFT - PASSIVE ANTI-THEFT SYSTEM (PATS)»(/ford/taurus-x/i-2007-2009/remont/door-locks-anti-theft-systems/#anti-theft-passive-anti-theft-system-pats) article.

Scheme 4

1. Disconnect the mass air flow (MAF) sensor electrical connector.
2. Remove the 2 screws and the MAF sensor. To install, tighten to 2 Nm (18 lb-in).
3. To install, reverse the removal procedure.

Scheme 5

1. Remove the lower intake manifold. For additional information, refer to «ENGINE - 3.5L»(/ford/taurus-x/i-2007-2009/remont/mechanical/#engine-35l) article.
2. Disconnect the cylinder head temperature (CHT) sensor electrical connector.
3. Remove and discard the CHT sensor. To install, tighten to 10 Nm (89 lb-in).
4. To install, reverse the removal procedure. Do not reuse the CHT sensor, install a new sensor.

Scheme 6

Scheme 7

1. For additional information, refer to the procedures.

Heated Oxygen Sensor (HO2S)

Special Tools Illustration Tool Name Tool Number Socket, Exhaust Gas Oxygen Sensor 303-476 (T94P-9472-A)

Material

RH sensor

1. Remove the PCV hose.
2. Disconnect the heated oxygen sensor (HO2S) electrical connector.
3. Using the special tool, remove the HO2S. To install, tighten to 48 Nm (35 lb-ft).
4. To install, reverse the removal procedure.

Catalyst Monitor Sensor

Special Tools Illustration Tool Name Tool Number Socket, Exhaust Gas Oxygen Sensor 303-476 (T94P-9472-A)

Material

1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to «JACKING AND LIFTING»(/ford/taurus-x/i-2007-2009/remont/hoistjack/#jacking-and-lifting) article.
2. Disconnect the catalyst monitor sensor electrical connector.
3. Using the special tool, remove the catalyst monitor sensor. To install, tighten to 48 Nm (35 lb-ft).
4. To install, reverse the removal procedure.

Scheme 8

1. Remove the LH or RH valve cover. For additional information, refer to «ENGINE - 3.5L»(/ford/taurus-x/i-2007-2009/remont/mechanical/#engine-35l) article.
2. Remove the bolt and the variable camshaft timing (VCT) oil control solenoid. To install, tighten to 10 Nm (89 lb-in).
3. To install, reverse the removal procedure.

Knock Sensor (KS)

Material

Scheme 9

1. Remove the thermostat housing. For additional information, refer to «ENGINE COOLING»(/ford/taurus-x/i-2007-2009/remont/cooling-system-mechanical/#engine-cooling-system) article.
2. Remove the lower intake manifold. For additional information, refer to «ENGINE - 3.5L»(/ford/taurus-x/i-2007-2009/remont/mechanical/#engine-35l) article.
3. Remove the coolant tube. Discard the O-ring seal.
4. Disconnect the knock sensor (KS) electrical connector.
5. Remove the 2 bolts and the KS. To install, tighten to 20 Nm (15 lb-ft).
6. To install, reverse the removal procedure. Lubricate the new O-ring seal with clean engine coolant.

See also:
• Introduction - Gasoline Engines
• INTAKE AIR DISTRIBUTION AND FILTERING
• JACKING AND LIFTING
• EXHAUST SYSTEM
• MODULE CONFIGURATION
• FRONT END BODY PANELS
• ANTI-THEFT - PASSIVE ANTI-THEFT SYSTEM (PATS)
• ENGINE - 3.5L
• ENGINE COOLING