2003 FORD MUSTANG turn signal

DIAGNOSIS AND TESTING
Transmission Connector Layouts
Transmission Vehicle Harness Connector
Transmission Internal Harness Connector SECTION 307-
01: Automatic Transaxle/Transmission 2003 Mustang Workshop Manual Pin Number Circuit Circuit Function
1 — NOT USED
2 — Signal Return
3 — Torque Converter Clutch (TCC) Solenoid
4 — Vehicle Power
5 — Transmission Fluid Temperature (TFT) Input
6 — Electronic Pressure Control (EPC) Solenoid
7 — SSA
8 — SSB
9 — NOT USED
10 — NOT USED Klj . 1 ba
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Digital Transmission Range (TR) Sensor Connector Pin Number Circuit Circuit Function
1 — NOT USED
2 — Signal Return Transmission Fluid Temperature (TFT)
3 — Torque Converter Clutch (TCC)
4 — Vehicle Power To Solenoid
5 — Transmission Fluid Temperature (TFT)
6 — Electronic Pressure Control
7 — SSA
8 — SSB
9 — NOT USED
10 — NOT USED
Pin Number Circuit Circuit Function Klj . 2 ba
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Output Shaft Speed (OSS) Sensor Harness Connector 1 — NOT USED
2 — Signal Return
3 — TR3A
4 — TR1
5 — TR2
6 — TR4
7 — NOT USED
8 — NOT USED
9 — Fused Power Feed
10 — Starter Control
11 — Reverse
12 — Starter to Starter Interrupt Relay
Pin Number Circuit Circuit Function
1 — Output Shaft Speed (OSS) Sensor
2 — Signal Return
Digital Transmission Range (TR) Sensor Diagnosis Chart Selector Position PID: TR PID: TR_D PID: TR_V (volts)
TR4 TR3A TR2 TR1 TR3A (PCM Pin 64 to sigrtn)
PARK P/N 0 0 0 0 0.0 Volts
In Between REV 0 1 0 0 1.3 -
1.8 Volts REVERSE REV 1 1 0 0 1.3 -
1.8 Volts In Between REV 0 1 0 0 1.3 -
1.8 Volts NEUTRAL NTRL 0 1 1 0 1.3 -
1.8 Volts In Between
O/D
a 1 1 1 0 1.3 -
1.8 Volts OVERDRIVE
O/D
a 1 1 1 1 1.3 -
1.8 Volts In Between Man 2 1 0 1 1 0.0 Volts Klj . 3 ba
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a
Will read "Drive" if O/D is canceled.
A. TR_V is the voltage at the PCM pin 64 (TR3A Circuit) to signal return.
B. "In Between" reading could be caused by a shift cable or digital TR sensor misaligned or a digital TR sensor circuit failure of TR1, TR2, TR3A, or TR4.
C. TR_D: 1= Open Digital TR switch, 0= Closed Digital TR switch.
D. EEC- V Control System Breakout Box Readings: Taken from PCM signal pins for TR1, TR2,
TR3A, TR4 to signal return.
„Voltages for TR1, TR2, TR4:
„ 0 = 0.0 volts.
„ 1 = 9.0 - 14.0 volts.
„ Voltage for TR3A:
„ 0 = 0.0 volts.
„ 1 = 1.3 - 1.8 volts.
Wiggle Test Information For Open/Shorts
z TR4, TR3A, TR2, and TR1 are all closed in PARK. PARK is a good position to check for
intermittent open circuits (with scan tool monitoring TR_D).
z TR4, TR3A, TR2, and TR1 are all open in OVERDRIVE, so OVERDRIVE is a good position to
check for shorts to ground. To determine the shorted components while observing TR_D,
unplug the TR and see if the short goes away. If the short is still present, unplug the
transmission harness and see if the short goes away. If the short is still present, then the short
is in the PCM or vehicle harness. Remove the suspect circuit(s) wire from the PCM vehicle
harness. If the short is still present, then the PCM has an internal failure. Otherwise the failure is
in the vehicle harness. Manual 2 Man 2 1 0 0 1 0.0 Volts
In Between Man 2 1 0 1 1 0.0 Volts
Manual 1 Man 1 0 0 1 1 0.0 Volts Klj . 4 ba
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z
Visually inspect the lead frame and connectors for
damage.
z Key in ON position.
z Measure the voltage with the positive lead to VPWR
solenoid pin and negative lead to a good ground.
z Is the voltage greater than 10 volts? GO to
A6 .
No
CHECK for open or short circuit
in harness, or solenoid. A6 ELECTRICAL SIGNAL CHECK
z
Measure the voltage with the positive lead connected to
VPWR solenoid pin and the negative lead to the signal
pin of the appropriate solenoid.
z Enter the following diagnostic mode on the diagnostic
tool: Trans- Bench Mode.
z Select Parameter SSA, SSB or TCC.
z Select "ON".
z Press "SEND".
z Turn the solenoids ON and OFF, while monitoring the
voltage, solenoid state on the scan tool (ON and OFF),
and listen for the solenoid to activate (click).
z Measure the voltage with the positive lead to VPWR pin
and the negative lead to the TCC pin.
z Enter the following diagnostic mode on the diagnostic
tool: Select Parameter TCC.
z Select "ON".
z Press "SEND".
z Turn the solenoid ON and OFF, while monitoring the
voltage, solenoid state on the scan tool (ON and OFF), Yes
GO to
A7 .
No
CHECK for open or short circuit
in harness, solenoid or a PCM
concern. Klj . 5 ba
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harness is wiggled, the sensor is tapped, or the
vehicle driven?
C6 CHECK DIGITAL TRANSMISSION RANGE SENSOR
OPERATION z
Disconnect: Digital TR Sensor .
z CAUTION: Do not pry on connector. This will
damage the connector and result in a transmission
concern.
z Connect: TR- E Cable to Transmission Tester.
z Connect: TR- E Cable to Digital TR Sensor.
z Place the Digital TR Overlay onto Transmission Tester.
z Carry out Sensor Test as instructed on the Digital TR
Overlay.
z Does the status lamp on the tester TRS- E cable
match the selected gear positions? Yes
Concern is not in the digital TR
sensor, GO to
C7 .
No
INSTALL a new digital TR
sensor. CLEAR DTCs and
REPEAT OBD Tests. C7 CHECK PCM HARNESS CIRCUITS FOR OPENS
z
Key in OFF position.
z Disconnect: Powertrain Control Module (PCM) .
z Inspect for damaged or pushed- out pins, corrosion or
loose wires.
z Disconnect: Digital TR Sensor.
z CAUTION: Do not pry the connector. This will
damage the connector and result in a transmission
concern.
z Disconnect the digital TR sensor connector.
z Install the EEC- V Control System Breakout Box.
z Measure the resistance between the PCM test pin 91 at
the EEC- V Control System Breakout Box and signal
return circuit pin 2 at digital TR sensor connector
harness side.
z For vehicles equipped with a 4.6L engine measure the
resistance between the PCM test pin 34 at the EEC- V
Control System Breakout Box and TR1 circuit pin 4 at
digital TR sensor connector harness side.
z For vehicles equipped with a 3.8L engine measure the
resistance between the PCM test pin 3 at the EEC- V Yes
GO to
C8 .
No
REPAIR open circuit(s).
RECONNECT all components.
CLEAR DTCs. REPEAT OBD
Tests. Klj . 11 ba
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D2 SOLENOID FUNCTIONAL TEST
z
Install 2,060 kPa (300 psi) pressure gauge into EPC tap.
z Monitor pressure gauge.
z Enter the following diagnostic mode on the diagnostic tool:
Parameter; EPC.
z Select value - 15, 30, 45, 60, 70 or 90 psi.
z Press "SEND".
z Select another value "0- 90 psi".
z Press "SEND".
z Enter the following diagnostic mode on the diagnostic tool:
XXX.
z Press "SEND".
z Does the pressure reading match the commanded
pressure? Yes
CLEAR DTCs. REPEAT OBD
Tests.
No
GO to
D3 .
D3 CHECK FOR BATTERY VOLTAGE
z
Remove transmission fluid pan.
z Visually inspect the lead frame connectors for damage.
z Key in ON position.
z Measure the voltage with positive lead to VPWR solenoid
pin and negative lead to a good ground.
z Is voltage greater than 10 volts? Yes
GO to
D4 .
No
REPAIR the circuit. CLEAR
the DTCs. REPEAT the OBD
Tests. D4 ELECTRICAL SIGNAL CHECK
z
Measure the voltage with positive lead connected to
VPWR solenoid pin and connect negative lead to the
signal pin of the EPC solenoid.
z Turn the solenoids ON and OFF, while monitoring the
voltage reading, solenoid state on the scan tool (ON and
OFF), listen for the solenoid to activate (click).
z Enter the following diagnostic mode on the diagnostic tool:
Trans- Bench Mode.
z Enter the following diagnostic mode on the diagnostic tool:
Parameter EPC.
z Select a value "0- 90 psi".
z Press "SEND".
z Select another value "0- 90 psi".
z Press "SEND".
z Enter the following diagnostic mode on the diagnostic tool: Yes
GO to
D5 .
No
CHECK for open or short
circuit in harness or PCM. Klj . 18 ba
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DIAGNOSIS AND TESTING
Speed Control
Refer to Wiring Diagrams Cell
31 , Speed Control for schematic and connector information.
Principles of Operation
The speed control system is designed to maintain vehicle speed above 48 km/h (30 mph). After the
ON switch is depressed, depressing the SET/ACCEL switch will activate the speed control servo. To
increase a set speed, either depress and hold for continuous acceleration, or momentarily tap the
SET/ACCEL switch for 1.6 km/h (1 mph) acceleration increments. To decrease a set speed, depress
and hold the COAST switch until the target speed is reached, or momentarily tap the COAST switch
for 1.6 km/h (1 mph) deceleration increments. When the speed control system has been disabled by
tapping the brake pedal, the RESUME switch can be depressed and the vehicle will return to the
original set speed if the vehicle is traveling over 48 km/h (30 mph) and the OFF switch has not been
depressed.
NOTE: The deactivator switch is provided as an additional safety feature. Normally, when the brake
pedal is depressed, an electrical signal from the brake lamp circuit to the speed control servo will
deactivate the system. Under increased brake pedal effort, the deactivator switch will open and
remove power to the speed control servo, releasing the throttle independent of the speed control
servo.
NOTE: The air bag sliding contract provides the electrical interface between the steering column wiring
and the speed control actuator switches in the steering wheel.
The inputs to the speed control servo are the:
zvehicle speed signal.
SECTION 310-
03: Speed Control 2003 Mustang Workshop Manual Special Tool(s)
Worldwide Diagnostic System
(WDS)
418-
F224,
New Generation STAR (NGS)
Tester
418- F052, or equivalent
diagnostic tool 73 Digital Multimeter or
equivalent
105-
R0051 Breakout Box, EEC-V Control
System 418-049, or equivalent
014- 00950 Klj . 1 ba
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