2003 FORD MUSTANG test G

reading is still greater than 0.5 volts when checked at the M-
terminal and less than 0.5 volts
when checked at the B- terminal, the concern is in the solenoid contacts. Install a new starter
motor. Refer to Starter Motor — 3.8L or
Starter Motor — 4.6L .
9. Clean the positive (+) battery cable connections. Repeat the test at the starter solenoid B terminal. If the voltage is greater than 0.5 volts, install a new positive battery cable.
Starter Motor— Ground Circuit
A slow cranking condition can be caused by resistance in the ground or return portion of the cranking
circuit. Check the voltage drop in the ground circuit as follows:
1. Connect the Digital Multimeter positive lead to the starter motor housing (the connection must be clean and free of rust or grease). Connect the negative lead to the negative (- ) battery
terminal.
2. Engage the remote starter switch. Read and record the voltage. The voltage reading should be less than 0.3 volts.
3. If the voltage is greater than 0.3 volts, clean the negative cable connections at the battery, body ground connections, and the starter ground connections. Retest.
4. If the voltage is greater than 0.3 volts, install a new cable. If the voltage reading is less than 0.2 volts and the engine still cranks slowly, install a new starter motor. Refer to Starter Motor — 3.8L
or
Starter Motor — 4.6L . Item Part Number Description
1 105-
R0057 Digital multimeter
2 10653 Battery
3 — S-
terminal 4 — M-
terminal 5 — B-
terminal 6 — Remote starter switch Klj . 10 ba
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DIAGNOSIS AND TESTING
Engine Ignition
Refer to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
SECTION 303-
07A: Engine Ignition — 3.8L 2003 Mustang Workshop Manual Klj . 1 ba
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DIAGNOSIS AND TESTING
Engine Ignition
Refer to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
SECTION 303-
07B: Engine Ignition — 4.6L (2V) 2003 Mustang Workshop Manual Klj . 1 ba
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DIAGNOSIS AND TESTING
Engine Ignition
Refer to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
SECTION 303-
07C: Engine Ignition — 4.6L (4V) 2003 Mustang Workshop Manual Klj . 1 ba
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DIAGNOSIS AND TESTING
Engine Emission Control
Refer to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
SECTION 303-
08: Engine Emission Control 2003 Mustang Workshop Manual Klj . 1 ba
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DIAGNOSIS AND TESTING
Intake Air Distribution and Filtering
Refer to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
SECTION 303-
12: Intake Air Distribution and Filtering 2003 Mustang Workshop Manual Klj . 1 ba
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DESCRIPTION AND OPERATION
Evaporative Emissions
Component Location
The evaporative emission system:
zis equipped with an on- board refueling vapor recovery (ORVR) system.
SECTION 303-
13: Evaporative Emissions 2003 Mustang Workshop Manual Item Part Number Description
1 9F980 Evaporative emission test port
2 9C915 Evaporative emission canister purge valve
3 9F945 Canister vent solenoid
4 9D653 Evaporative emission canister
5 9C047 Fuel vapor control valve tube assembly Klj . 1 ba
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z
prevents hydrocarbon emissions from reaching the atmosphere.
z stores fuel vapors in the evaporative emission (EVAP) canister that are generated during
vehicle operation or hot soak, or vehicle refueling, until they can be consumed by the engine.
z routes the stored fuel vapors to the engine during engine operation.
z is controlled by the powertrain control module (PCM) which uses various sensor inputs to
calculate the desired amount of purge flow. The PCM regulates the purge flow, induced by the
application of intake manifold vacuum, by varying the duty cycle applied to the EVAP canister
purge valve.
z has an evaporative emission test port for test purposes.
The fuel vapors are routed:
zfrom the fuel tank through the fuel vapor control valve and fuel vapor vent valve.
z to the EVAP canister through a vapor line.
z to the engine when the EVAP canister purge valve is opened by the PCM.
The fuel tank pressure (FTP) sensor:
zmonitors the pressure levels in the fuel tank.
z communicates the pressure reading to the PCM during the OBDII leak test.
z is located in- line above the fuel tank and is serviced as part of the fuel vapor control valve tube
assembly.
The evaporative emission canister:
zis located in the left rear quarter panel.
z contains activated carbon.
z stores fuel vapor.
The fuel tank filler cap:
zrelieves system pressure above 14 kPa (56.21 inches H
2 O).
z relieves system vacuum below 3.8 kPa (15.26 inches H
2 O).
The canister vent solenoid: zis normally open.
z seals the EVAP system for the inspection and maintenance (I/M 240) test and OBDII leak and
pressure tests.
z is mounted to the evaporative emission canister.
z is repaired as a separate item.
The evaporative emission (EVAP) canister purge valve:
zis normally closed.
z regulates purging of the EVAP canister.
z is controlled by the PCM. Klj . 2 ba
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