coolant temperature FORD MUSTANG 2003 Owner's Guide

6. Disconnect the following connections:
zFour ignition coils
z Four fuel injectors
z Positive crankcase ventilation (PCV) hose from valve cover.
7. Disconnect the following connectors: zRH radio ignition interference capacitor
z Engine coolant temperature (ECT) sensor 8. Disconnect the 16 pin connector Klj . 2 ba
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6. Remove the PCV valve.
7. Disconnect and remove the PCV hose.
8. Disconnect the camshaft position (CMP) sensor electrical connector.
9. Disconnect the engine coolant temperature (ECT) sensor electrical connector and unclip the
harness from the stud. Klj . 2 ba
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Item Part
Number Description
1 — Engine control sensor wiring 42 pin electrical
connector
2 — 16 pin electrical connector
3 — Engine control jumper harness electrical connector
4 — RH heated oxygen sensor (HO2S) electrical
connector
5 — Transmission main control harness electrical
connector.
6 — Fuel injector electrical connectors
7 — Heated positive crankcase ventilation (PCV) valve
electrical connector.
8 — Radio ignition interference capacitor electrical
connector
9 — Ignition coil electrical connectors
10 — Generator battery electrical connector
11 — Generator field electrical connector
12 — Engine coolant temperature (ECT) sensor
electrical connector
13 — Fuel pressure sensor electrical connector
14 — Exhaust vacuum regulator (EVR) electrical
connector
15 — Idle air control (IAC) electrical connector
16 — EGR backpressure transducer electrical connector
17 — Power distribution box battery feed electrical wire
18 — Camshaft position (CMP) sensor electrical
connector Klj . 2 ba
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18. Disconnect the electrical connector.
19. Disconnect the following generator electrical connectors:
zBattery power supply wire.
z Voltage regulator.
20. Disconnect the camshaft position (CMP) sensor electrical connector.
21. Disconnect the engine coolant temperature (ECT) sensor electrical connector. Klj . 5 ba
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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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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
Engine Coolant Temperature (ECT) Sensor —
4.6L (2V)
Removal 1. Disconnect the battery ground cable. For additional information, refer to Section 414 - 01 .
2. Partially drain the cooling system. For additional information, refer to Section 303 - 03A .
3. Disconnect the engine coolant temperature (ECT) sensor (12A648) connector.
4. Remove the ECT sensor.
Installation 1. To install, reverse the removal procedure.
SECTION 303-
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REMOVAL AND INSTALLATION
Engine Coolant Temperature (ECT) Sensor —
Cobra
Removal and Installation 1. Partially drain the engine cooling system. For additional information, refer to Section 303 - 03A .
2. Disconnect the engine coolant temperature (ECT) sensor electrical connector.
3. Remove the ECT sensor.
4. To install, reverse the removal procedure. zApply sealant to the ECT sensor threads.
SECTION 303-
14: Electronic Engine Controls 2003 Mustang Workshop Manual Material
Item Specification
Pipe Sealant with Teflon
D8AZ-
19554- A WSK-
M2G350- A2 Klj . 1 ba
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REMOVAL AND INSTALLATION
Engine Coolant Temperature (ECT) Sensor —
Mach I
Removal and Installation 1. Remove the air intake scoop. For additional information, refer to Section 303 - 12 .
2. Partially drain the engine cooling system. For additional information, refer to Section 303 - 03A .
3. Disconnect the engine coolant temperature (ECT) sensor electrical connector.
4. Remove the ECT sensor.
5. To install, reverse the removal procedure. zApply sealant to the ECT sensor threads.
SECTION 303-
14: Electronic Engine Controls 2003 Mustang Workshop Manual Material
Item Specification
Pipe Sealant with Teflon
D8AZ-
19554- A WSK-
M2G350- A2 Klj . 1 ba
22003 Mustang Workshop Manual
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