2003 FORD MUSTANG key

PINPOINT TEST B: TRANSMISSION FLUID TEMPERATURE (TFT)
SENSOR
Test Step Result / Action to Take
NOTE:
Refer to the Transmission Connector Layouts preceding these pinpoint tests. B1 ELECTRONIC DIAGNOSTICS
z
Check to make sure the transmission harness
connector is fully seated, pins are fully engaged in
connector and in good condition before proceeding.
z Connect the diagnostic tool.
z Key in ON position.
z Select Diagnostic Data Link.
z Select PCM.
z Select PID/Data Monitor and Record.
z Enter the following diagnostic mode on the diagnostic
tool: PIDs; TFT, TFTV.
z Does the vehicle enter PID/Data Monitor and
Record? Yes
GO to
B2 .
No
REPEAT procedure to enter PID. If
vehicle did not enter PID, REFER
to the Powertrain
Control/Emissions Diagnosis
(PC/ED) manual for diagnosis of
PCM. B2 WARM-
UP/COOL-DOWN CYCLE z
While monitoring the TFT PIDs, carry out the
following test: If transmission is cold, run transmission
to warm it up. If transmission is warm, allow
transmission to cool down.
z Do the TFT PIDs increase as the transmission is
warmed up or decrease as the transmission is
cooled or does the TFT or TFTV drop in and out
of range? Yes
If the TFT PIDs increase as the
transmission is warmed or
decrease as the transmission is
cooled, CLEAR all DTCs. ROAD
TEST to verify if concern is still
present. If concern is still present,
REFER to
Diagnosis By Symptom in this section to diagnose
transmission overheating.
If the TFT or TFTV drop in and out
of range, INSPECT for intermittent
concern in the internal/external
harness, sensor or connector.
No
GO to
B3 .
B3 ELECTRICAL SIGNAL CHECK
z
Key in ON position.
z Remove transmission fluid pan.
z Visually inspect the lead frame and connectors for
damage.
z Measure the voltage with the positive lead to positive
TFT at sensor pin and negative lead to a good
ground. Yes
GO to
B4 .
No
CHECK for open or short circuit in
vehicle harness, internal harness
or a PCM concern. Klj . 8 ba
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C1 VERIFY DIAGNOSTIC TROUBLE CODES
z
Select PARK.
z Key in OFF position.
z NOTE: DTC codes P0705 and P0708 cannot be set by
an incorrectly adjusted digital TR sensor.
z Carry out on board diagnostic test.
z Are only DTC codes P0705, P0708 present? Yes
GO to
C4 .
No
GO to C2 .
C2 VERIFY DIGITAL TRANSMISSION RANGE SENSOR
ALIGNMENT z
Check to make sure the digital TR sensor harness
connector is fully seated, pins are fully engaged in
connector and in good condition before proceeding.
z Apply the parking brake.
z Select NEUTRAL.
z Disconnect the shift cable/linkage from the manual lever.
z Verify that the digital TR Sensor Alignment Tool fits in
the appropriate slots.
z Is the digital TR sensor adjustment OK? Yes
GO to
C3 .
No
ADJUST the digital TR sensor.
PLACE transmission range
selector lever in P and CLEAR
DTCs. REPEAT OBD Tests.GO
to C3 .
C3 VERIFY SHIFT CABLE/LINKAGE ADJUSTMENT
z
Place the manual lever in the overdrive position.
z Select DRIVE.
z Reconnect the shift cable/linkage.
z Verify that the shift cable/linkage is adjusted OK. Refer
to Section 307 - 05 .
z Is the shift cable/linkage adjusted OK? Yes
GO to
C4 .
No
ADJUST the shift cable/linkage.
REFER to Section 307 - 05 .
C4 CHECK ELECTRICAL SIGNAL OPERATION
z
Select PARK.
z Disconnect: Digital TR Sensor.
z CAUTION: Do not pry on connector. This will
damage the connector and result in a transmission
concern.
z Press the button and pull out on the digital TR harness
connector.
z Inspect both ends of the connector for damage or
pushed- out pins, corrosion, loose wires and missing or
damaged seals.
z Are the connector, pins and harness damaged? Yes
REPAIR as required. CLEAR
DTCs and REPEAT OBD
Tests.
No
If diagnosing a DTC, GO to
C5
.
If diagnosing a starting concern
or a reversing lamp concern,
GO to C10 .
C5 CHECK ELECTRICAL SYSTEM OPERATION (DIGITAL
TR AND PCM) z
Key in OFF position.
z Connect the diagnostic tool.
z Connect: Digital TR Sensor.
z Key in ON position.
z Enter the following diagnostic mode on the diagnostic
tool: TR PIDS TR, TR_D, TR_V.
z Move transmission range selector lever into each gear
and stop.
z Observe any of the following PIDs, TR and TR_D, TR_V
(vehicle dependent) while wiggling harness, tapping on
sensor, or driving the vehicle. Use PIDs TR, and TR_D
for DTCs P0705, P1704, and P1705. Use PIDs TR, and
TR_V for DTC P0708.
z Compare the PIDs to the Digital Transmission Range
(TR) Sensor Diagnosis Chart.
z Do the PIDs TR, TR_D and TR_V match the Digital
Transmission Range (TR) Sensor Diagnosis chart,
and does the TR_D PID remain steady when the Yes
The problem is not in the digital
TR sensor system. REFER to
Diagnosis By Symptom
in this
section for further diagnosis.
No
If TR_D changes when wiggling
harness, tapping on the sensor,
or driving the vehicle, the
problem may be intermittent.
GO to C6 . Klj . 10 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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PINPOINT TEST D: ELECTRICAL PRESSURE CONTROL (EPC)
SOLENOID z
Are all the resistances greater than 10,000 ohms? C10 CHECK THE NON-
PCM INTERNAL CIRCUITS OF
SENSOR z
Connect: TRS- E Cable to Transmission.
z Connect: TRS- E Cable to Digital TR Sensor.
z Place the Digital TR Overlay onto Transmission Tester.
z Carry out Switch Test as instructed on the Digital TR
Overlay.
z Does the status lamp on the tester indicate RED for
the correct gear position? Yes
Concern is not in the digital TR
sensor. For starting system
concerns, REFER to
Section 303 - 06 . For reversing lamp
concerns, REFER to Section 417 - 01 . For optional circuits,
REFER to the Powertrain
Control/Emissions Diagnosis
(PC/ED) manual for diagnosis.
No
INSTALL a new digital TR
sensor. CLEAR DTCs.
REPEAT OBD Tests. Test Step Result / Action to Take
NOTE:
Refer to the Transmission Internal Harness illustration preceding these pinpoint tests. NOTE:
Read and record all DTCs. All digital TR Sensor and VSS DTCs must be repaired before
entering Output State Control (OSC). D1 ELECTRONIC DIAGNOSTICS
z
Key in OFF position.
z Select PARK.
z Check to make sure the transmission harness connector
is fully seated, pins are fully engaged in the connector and
in good condition before proceeding.
z Connect the diagnostic tool.
z Key in ON position.
z Enter the following diagnostic mode on the diagnostic tool:
Diagnostic Data Link.
z Enter the following diagnostic mode on the diagnostic tool:
PCM.
z Enter the following diagnostic mode on the diagnostic tool:
Active Command Modes.
z Enter the following diagnostic mode on the diagnostic tool:
Output State Control (OSC).
z Enter the following diagnostic mode on the diagnostic tool:
Trans- Bench Mode.
z Does the vehicle enter the Trans- Bench Mode? Yes
GO to
D2 .
No
REPEAT procedure to
ENTER Trans-Bench Mode. If
vehicle did not enter OSC,
REFER to the Powertrain
Control/Emissions Diagnosis
(PC/ED) manual for diagnosis
of PCM. Klj . 17 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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XXX.
z Press "SEND".
z Does the voltage and solenoid state change? D5 CHECK LEAD FRAME CONNECTIONS
z
Key in OFF position.
z Disconnect: Lead Frame.
z Inspect for damaged or pushed out pins, corrosion, etc.
z Using the special tool, check each of the lead frame
connector pins.
z Does the special tool go through the lead frame
connector pins? Yes
INSTALL a new lead frame.
GO to
D6 .
No
GO to D6 .
D6 CHECK SOLENOID RESISTANCE AT SOLENOID
z
Disconnect: Transmission Harness .
z Measure the resistance between the pins of the solenoid.
z Measure the resistance of the EPC solenoid.
z Is the resistance between 2.48 and 5.66 ohms? Yes
GO to
D7 .
No
INSTALL a new solenoid.
CLEAR the DTCs. REPEAT
the OBD Tests. D7 CHECK SOLENOID FOR SHORT TO GROUND
z
Check for continuity between engine GROUND and the
EPC solenoid terminals with ohmmeter or other low
current tester (less than 200 milliamps). Connection
should show infinite resistance (no continuity).
z Is there continuity? Yes
INSTALL a new solenoid.
CLEAR the DTCs. REPEAT
the OBD Tests.
No
REFER to
Diagnosis By Symptom in this section for
diagnosis of pressure
concerns. Klj . 19 ba
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PINPOINT TEST E: OUTPUT SHAFT SPEED (OSS) SENSORS
Test Step Result / Action to Take
NOTE:
Refer to the Output Shaft Speed (OSS) Sensor Harness Connector illustration preceding
these pinpoint tests. E1 ELECTRONIC DIAGNOSTICS
z
Check to make sure the transmission harness
connector is fully seated, pins are fully engaged in
connector and in good condition before proceeding.
z Connect the diagnostic tool.
z Key in ON position.
z Enter the following diagnostic mode on the diagnostic
tool: Diagnostic Data Link.
z Enter the following diagnostic mode on the diagnostic
tool: PCM.
z Select PID/Data Monitor and Record.
z Select the PID OSS.
z Does vehicle enter PID/Data Monitor and Record? Yes
GO to
E2 .
No
REPEAT procedure to ENTER
PID. If vehicle did not enter PID,
REFER to the Powertrain
Control/Emissions Diagnosis
(PC/ED) manual for diagnosis of
PCM. E2 DRIVE CYCLE TEST
z
While monitoring the OSS Speed PID, drive the
vehicle so that the transmission upshifts and
downshifts through all gears.
z Does the OSS Speed PID increase and decrease
with engine and vehicle speed? Yes
CLEAR all DTCs. ROAD TEST to
verify if concern is still present. If
concern is still present, REFER to
Diagnosis By Symptom
in this
section.
No
If the OSS Speed PID does not
increase and decrease with
engine and vehicle speed,
INSPECT for open or short in
vehicle harness, sensor, a PCM
concern, or internal hardware
concern.
If the sensor signal is erratic,
INSPECT for intermittent concern
in the internal/external harness,
sensor, or connector.
If the sensor signal is steady, GO
to E3 .
E3 CHECK RESISTANCE OF OSS SENSOR
z
Disconnect the vehicle harness connector from the
OSS sensor.
z Measure the resistance between the OSS sensor pins. Yes
REFER to
Diagnosis By Symptom for concern diagnosis.
No
INSTALL a new OSS sensor. Klj . 20 ba
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DESCRIPTION AND OPERATION
External Controls
The transmission shift cable transfers the transmission operating mode from the gearshift lever to the
automatic transmission (7003). The indicated position of the transmission floor mounted selector lever
is transferred to the transmission through the cable and down to the manual control lever on the
transmission.
Shift Interlock System
The brake/shift interlock mechanism is used on vehicles equipped with an automatic transmission.
This system is used to prevent shifting from PARK unless the brake pedal is depressed. The
brake/shift interlock system consists of an actuator attached to the key interlock assembly and
necessary wiring. The shift lock actuator is energized when the ignition switch is turned to the run
position, locking the floor mounted transmission range selector lever in the PARK position. When the
brake pedal is depressed, the shift lock actuator is deactivated and the floor mounted transmission
range selector lever can be moved out of the PARK position.
Transmission Control Switch (TCS)
The transmission control switch (TCS) is a momentary contact switch that is located on the floor
mounted transmission range selector lever. Pushing the TCS will either disengage or engage the
overdrive function of the automatic transmission. If the OVERDRIVE is disengaged, the word O/D OFF
will illuminate on the instrument cluster.
SECTION 307-
05: Automatic Transaxle/Transmission External Controls 2003 Mustang Workshop Manual Klj . 1 ba
12003 Mustang Workshop Manual
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