sensor FORD MUSTANG 2003 Workshop Manual

REMOVAL AND INSTALLATION
Fuel Vapor Vent Valve
Removal and Installation
1. NOTE: The fuel vapor vent valve is repaired along with the fuel vapor control valve and the in-
line fuel tank pressure sensor as a fuel vapor control valve tube assembly.
For removal and installation of the fuel vapor vent valve, refer to Fuel Vapor Control Tube Assembly Valve in this section.
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REMOVAL AND INSTALLATION
Fuel Vapor Control Tube Assembly Valve
Removal and Installation
1. Remove the fuel tank. For additional information, refer to Section 310 - 01 .
2. Remove the retainers.
3. NOTE: The fuel vapor vent valve, fuel vapor control valve and the in- line fuel tank pressure
sensor are repaired as a fuel vapor control valve tube assembly.
NOTE: It may be necessary to lubricate the fuel vapor control valve tube assembly grommets
with ESE- M00B144- B Merpol® or equivalent to assist in the removal procedure.
Remove the fuel vapor control valve tube assembly. 1. Loosen the fuel vapor vent valve.
2. Loosen the fuel vapor control valve.
3. Remove the fuel vapor control valve tube assembly.
4. NOTE: Lubricate all O- ring seals with MERPOL® O-Ring Seal Lubricant or equivalent meeting
Ford specification ESE-M99B144- B.
NOTE: New grommets are necessary when the fuel vapor control valve tube assembly is
removed.
To install, reverse the removal procedure.
zLeak test the system. For additional information, refer to Evaporative Emission System Leak Test in this section.
z Carry out the evaporative emission repair verification drive cycle. For additional
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REMOVAL AND INSTALLATION
Fuel Tank Pressure Sensor
Removal and Installation
1. NOTE: The in-line fuel tank pressure sensor is repaired along with the fuel vapor vent valve and
the fuel vapor control valve as a fuel vapor control valve tube assembly.
For removal and installation of the fuel vapor control valve, refer to Fuel Vapor Control Tube Assembly Valve in this section.
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SPECIFICATIONS
SECTION 303-
14: Electronic Engine Controls 2003 Mustang Workshop Manual General Specifications
Item Specification
Lubricants
Super premium SAE 5W-
20 Engine Oil XO-5W20-DSP WSS-
M2C914- A Penetrating and Lock Lubricant E8AZ-19A501-
B N/A
Pipe Sealant with Teflon D8AZ-19554-
A WSK-
M26350- A2
Torque Specifications Description Nm lb-
ft lb-
in Cylinder head temperature (CHT) sensor —
3.8L 10 — 89
Engine coolant temperature (ECT) sensor —
4.6L (2V) 20 — 15
Engine coolant temperature (ECT) sensor —
4.6L (4V) 24 18 —
Heated oxygen sensors (HO2S) 41 30 —
Catalyst monitor sensors 41 30 —
Crankshaft position (CKP) sensor bolts —
3.8L 6 — 53
Crankshaft position (CKP) sensor bolts —
4.6L 10 — 89
Power steering reservoir bolts 10 — 89
Camshaft position (CMP) sensor bolt —
4.6L 10 — 89
PCM connector to module bolt 6 — 53
Idle air control (IAC) valve bolts 10 — 89
Camshaft synchronizer housing bolt 25 18 —
Throttle position (TP) sensor screws 3 — 27
Fuel pressure sensor bolts 4 — 35
Air intake scoop bolts 25 18 —
Air intake scoop bracket bolt 25 18 —
Air intake scoop bracket nuts 25 18 —
Air intake scoop bracket throttle body nut 9 — 80
Exhaust gas recirculation (EGR) vacuum regulator solenoid bolts 10 — 89 Klj . 1 ba
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DESCRIPTION AND OPERATION
Electronic Engine Controls
The electronic engine controls consist of the following:
zpowertrain control module (PCM)
z throttle position (TP) sensor
z idle air control (IAC) valve
z engine coolant temperature (ECT) sensor
z cylinder head temperature sensor
z camshaft position (CMP) sensor
z crankshaft position (CKP) sensor
z mass air flow (MAF) sensor
z intake air temperature (IAT) sensor
z heated oxygen sensor (HO2S) — front
z catalyst monitor sensor — rear
z wheel speed sensor
The powertrain control module needs the following inputs to calibrate the engine correctly:
zcrankshaft position
z engine rpm
z engine load (manifold pressure)
z atmospheric (barometric) pressure
z engine coolant temperature
The throttle position sensor:
zsends the powertrain control module a signal indicating the throttle plate angle.
z is the main input to the powertrain control module from the driver.
The idle air control valve:
zcontrols bypass air around the throttle plate at low speeds.
z is controlled by the powertrain control module.
The cylinder head temperature sensor:
zprovides a gauge signal for coolant temperature.
z is mounted on rear of LH cylinder head.
z sends the powertrain control module a signal indicating engine temperature.
z resistance decreases as coolant temperature increases.
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The camshaft position sensor:
zsends the powertrain control module a signal indicating camshaft position, used for fuel
synchronization.
The crankshaft position sensor:
zsends the powertrain control module a signal indicating crankshaft position.
z is essential for calculating spark timing.
The mass air flow sensor:
zsends the powertrain control module a signal indicating mass air flow rate of air entering the
engine.
The intake air temperature sensor:
zsends the powertrain control module a signal indicating the temperature of the air entering the
engine.
The heated oxygen sensor:
zhas the ability to create a voltage signal depending on exhaust oxygen content.
z provides feedback information to the powertrain control module used to calculate fuel delivery.
The rear catalyst monitor sensor:
zmonitors oxygen content after the oxygen flows through the catalytic converter.
z provides a voltage to the powertrain control module used to calculate catalytic converter
integrity.
The wheel speed sensor:
zsends a signal to the powertrain control module indicating wheel speed. Klj . 2 ba
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DESCRIPTION AND OPERATION
Electronic Engine Controls —
Cobra
Most of the Cobra engine electronic controls are similar to that of the non- supercharged 4.6L (2V)
engine. These components are as follows:
zCrankshaft position (CKP) sensor
z Throttle position (TP) sensor
z Idle air control (IAC) valve
z Mass air flow (MAF) sensor
z Heated oxygen sensors (HO2S)
z Engine coolant temperature (ECT) sensor
There are also three controls that are unique to the Cobra engine. These are as follows:
zIntegrated temperature and manifold absolute pressure (T- MAP) sensor
z Supercharger bypass vacuum solenoid
z Supercharger bypass vacuum solenoid — actuator
Supercharger Bypass Vacuum Solenoid and Actuator
The Supercharger bypass vacuum solenoid will bleed off boost under the following conditions:
zheavy engine misfire
z engine coolant over- temperature
z loss of intercooler fluid
z pump failure
This prevents damage that can occur if boost were allowed under these conditions. The solenoid is
located on the upper LH side of the engine. The solenoid uses engine vacuum to operate a actuator
and linkage that connects to the pressure bleed off valve. The actuator is located near the solenoid
and is connected to it by a vacuum line.
Integrated Temperature and Manifold Absolute Pressure (TMAP) Sensor
The TMAP sensor is located on the upper LH side of the engine and is used to measure current
manifold absolute pressure and manifold air charge temperature. SECTION 303-
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REMOVAL AND INSTALLATION
Temperature and Manifold Absolute Pressure (T-
MAP)
Sensor — Cobra
Removal and Installation 1. Disconnect the temperature manifold absolute pressure (T- MAP) sensor electrical connector.
2. Remove the bolts and the T- MAP sensor.
3. To install, reverse the removal procedure.
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REMOVAL AND INSTALLATION
Camshaft Position (CMP) Sensor —
3.8L
Removal 1. Disconnect the battery ground cable. For additional information, refer to Section 414 - 01 .
2. Remove the camshaft position (CMP) sensor. zDisconnect the connector.
z Remove the bolts and the sensor.
Installation 1. To install, reverse the removal procedure.
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REMOVAL AND INSTALLATION
Camshaft Position (CMP) Sensor —
4.6L
Removal and Installation 1. Disconnect the battery ground cable. For additional information, refer to Section 414 - 01 .
2. Remove the bolts and position aside the power steering pump reservoir.
3. Remove the camshaft position (CMP) sensor. zDisconnect the connector.
z Remove the bolt and the sensor.
4. To install, reverse the removal procedure.
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22003 Mustang Workshop Manual
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