AC system FORD MUSTANG 2003 Workshop Manual

a
Output circuit check, generated only by electrical symptoms.
b May also be generated by some other non- electric transmission hardware system.
Rotunda Transmission Tester
The Transmission Tester is used to diagnosis the digital transmission range sensor and is used in
conjunction with the pinpoint tests. The tests should be carried out in order. Installing the Transmission
Tester allows separation of the vehicle electronics from transmission electronics; refer to the
Transmission Tester manual for these tests.
zDigital Transmission Range (TR) Sensor Testing components converter
clutch
engagement
error (engine speed
surge) across the
torque converter
clutch. present in 3rd gear.
P1742 TCC,
internal
components TCC solenoid
failed ON TCC solenoid has
failed on by
electric,
mechanical or
hydraulic concern. Harsh shifts. Go To Pinpoint
Test A .
P1743 TCC,
internal
components TCC solenoid
failed ON TCC solenoid has
failed ON by
electric,
mechanical or
hydraulic concern. Harsh shifts. Go To Pinpoint
Test A .
P1744 TCC TCC The PCM picked
up an excessive
amount of TCC
slippage during
normal vehicle
operation. TCC
slippage/erratic or
no torque converter
clutch operation. GO to Diagnosis by
Symptom.
P1767 TCC TCC solenoid
circuit failure
during OBD
Test TCC solenoid
circuit fails to
provide voltage
drop across
solenoid. Circuit
open or shorted or
PCM Driver failure
during OBD Test. Short circuit: engine
stalls in second
(O/D, 2 range) at
low idle speeds with
brake applied.
Open circuit:
Torque Converter
never engages. Go To Pinpoint
Test A .
P1780 TCS TCS not
changing
states TCS not cycled
during self-
test.
TCS circuit open
or shorted. Rerun on-
board
diagnostic and
cycle switch. No
OD cancel when
switch is cycled. REFER to the
Powertrain
Control/Emissions
Diagnosis (PC/ED)
manual.
— TCIL TCIL circuit
failure TCIL circuit open
or shorted. Failed on, OD
cancel mode on. No
flashing TCIL for
EPC failure or
sensor. Failed off,
OD cancel mode
never indicated. No
flashing TCIL for
EPC sensor failure. REFER to the
Powertrain
Control/Emissions
Diagnosis (PC/ED)
manual
P1709 PNP switch PNP switch
out of self-
test
range Vehicle not in
PARK or
NEUTRAL during
on-
board
diagnostic. Rerun on-
board
diagnostic in PARK
or NEUTRAL. Go To Pinpoint
Test C . Klj . 7 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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DIAGNOSIS AND TESTING
Pinpoint Tests —
OSC Equipped Vehicles
SECTION 307-
01: Automatic Transaxle/Transmission 2003 Mustang Workshop Manual Special Tool(s)
Breakout Box, EEC-V Control
System
418- 049 (T94L-50- EEC-V) or
equivalent MLP-
TR Cable
418- F107 (007- 00111) or
equivalent Worldwide Diagnostic System
(WDS)
418–F224
New Generation STAR (NGS)
Tester
418- F052 or equivalent scan
tool Transmission Tester
307-
F016 (007- 00130) or
equivalent Trans Tester TR/MLP Overlay
and Manual
007-
00131 or equivalent 73 III Automotive Meter
105-
R0057 or equivalent Gauge, Transmission Solenoid
Connectors
307-426 Klj . 1 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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Control System Breakout Box and TR1 circuit pin 4 at
digital TR sensor connector harness side.
z Measure the resistance between the PCM test pin 49 at
the EEC- V Control System Breakout Box and TR2 circuit
pin 5 at digital TR sensor connector harness side.
z Measure the resistance between the PCM test pin 50 at
the EEC- V Control System Breakout Box and TR4 circuit
pin 6 at digital TR sensor connector harness side.
z Measure the resistance between the PCM test pin 64 at
the EEC- V Control System Breakout Box and TR3A
circuit pin 3 at digital TR sensor connector harness side.
z Are all resistances less than 5 ohms? C8 CHECK PCM HARNESS CIRCUITS FOR SHORT TO
GROUND OR POWER z
Measure the resistance between PCM test pin 91 and Yes Klj . 12 ba
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test pins 71 and 97 at the EEC-
V Control System
Breakout Box.
z For vehicles equipped with a 3.8L engine measure the
resistance between PCM test pin 3 and test pins 71, 97,
51, 76, 77, 103, and 91 at the EEC- V Control System
Breakout Box and chassis ground.
z For vehicles equipped with a 4.6L engine measure the
resistance between PCM test pin 34 and test pins 71,
97, 51, 77, 103, and 91 at the EEC- V Control System
Breakout Box and chassis ground.
z For vehicles equipped with a 3.8L engine measure the
resistance between PCM test pin 49 and test pins 71,
97, 51, 76, 77, 103, and 91 at the EEC- V Control System
Breakout Box and chassis ground.
z For vehicles equipped with a 4.6L engine measure the
resistance between PCM test pin 49 and test pins 71, GO to
C9 .
No
REPAIR short circuit(s).
RECONNECT all components.
CLEAR DTCs. REPEAT OBD
Tests. Klj . 13 ba
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97, 51, 77, 103, and 91 at the EEC-
V Control System
Breakout Box and chassis ground.
z For vehicles equipped with a 3.8L engine measure the
resistance between PCM test pin 50 and test pins 71,
97, 51, 76, 77, 103, and 91 at the EEC- V Control System
Breakout Box and chassis ground.
z For vehicles equipped with a 4.6L engine measure the
resistance between PCM test pin 50 and test pins 71,
97, 51, 77, 103, and 91 at the EEC- V Control System
Breakout Box and chassis ground.
z For vehicles equipped with a 3.8L engine measure the
resistance between PCM test pin 64 and test pins 71,
97, 51, 76, 77, 103, and 91 at the EEC- V Control System
Breakout Box and ground.
z For vehicles equipped with a 4.6L engine measure the
resistance between PCM test pin 64 and test pins 71, Klj . 14 ba
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97, 51, 77, 103, and 91 at the EEC-
V Control System
Breakout Box and chassis ground.
z Are all resistances greater than 10,000 ohms? C9 CHECK FOR SHORT BETWEEN TR/PCM INPUT
SIGNAL CIRCUITS z
For vehicles equipped with a 3.8L engine measure the
resistance between test pin 3 and pins 49, 50, and 64 at
the EEC- V Control System Breakout Box.
z For vehicles equipped with a 4.6L engine measure the
resistance between test pin 34 and pins 49, 50, and 64
at the EEC- V Control System Breakout Box.
z For vehicles equipped with a 3.8L engine measure the
resistance between test pin 49 and pins 3, 50, and 64 at
the EEC- V Control System Breakout Box.
z For vehicles equipped with a 4.6L engine measure the Yes
INSTALL a new PCM. REFER
to Section 303
- 14 .
RECONNECT all components.
CLEAR DTCs. REPEAT OBD
Tests.
No
REPAIR shorts on circuits
having less than 10,000 ohms
between other TR/PCM input
signal circuits. RECONNECT
all components. CLEAR DTCs.
REPEAT OBD Tests. Klj . 15 ba
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resistance between test pin 49 and pins 34, 50, and 64
at the EEC-
V Control System Breakout Box.
z For vehicles equipped with a 3.8L engine measure the
resistance between test pin 50 and pins 3, 49, and 64 at
the EEC- V Control System Breakout Box.
z For vehicles equipped with a 4.6L engine measure the
resistance between test pin 50 and pins 34, 49, and 64
at the EEC- V Control System Breakout Box.
z For vehicles equipped with a 3.8L engine measure the
resistance between test pin 64 and pins 3, 49, and 50 at
the EEC- V Control System Breakout Box.
z For vehicles equipped with a 4.6L engine measure the
resistance between test pin 64 and pins 34, 49, and 50
at the EEC- V Control System Breakout Box. Klj . 16 ba
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