2003 FORD MUSTANG engine

z
the engine is ON.
z the transmission range selector lever is in O/D.
z the vehicle speed is greater than 3.2 km/h (2 mph).
OSC "TCC ON" DRIVE MODE operates ONLY when:
zthe digital TR sensor is operational and no digital TR sensor DTCs are present.
z the vehicle speed sensor is operational and no VSS sensor DTCs are present.
z the engine is ON.
z the transmission range selector lever is in O/D.
z the vehicle speed is greater than 3.2 km/h (2 mph).
z the transmission is in 2nd gear or higher.
z the TFT is between 15 and 135°C (60 and 275°F).
z the brake is not applied "OFF" below 32 km/h (20 mph).
z (Not an excessive load on engine (engine lugging).
OSC Command Values
zOFF - turns TCC OFF.
z ON - turns TCC ON.
z XXX - cancels OSC value sent.
z SEND - sends the values to PCM.
Drive Mode Procedures for TCC
Follow operating instructions from the scan tool menu screen.
zSelect "Output State Control."
z Select "Trans - Drive Mode."
z Select "PIDs" to be monitored.
z Monitor all selected PIDs during test.
z Select "Parameters - TCC."
z Select "ON" to turn solenoid ON.
z Press "SEND" to send command ON.
z Select "OFF" to turn solenoid OFF.
z Press "SEND" to send command OFF.
z Select "XXX" to cancel at any time.
z Press "SEND."
EPC in DRIVE MODE
This OSC function is used to increase the EPC pressure while testing the transmission shift functions.
This OSC function can only increase the EPC pressure greater than what the PCM normally
commands. If an OSC value, such as (75) or (90) psi is sent, the upshifts and downshifts should
exhibit a firmer shift. Firmer shifts would indicate that the EPC pressure control is working at higher Klj . 6 ba
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pressures. The best test for the EPC is to use the BENCH MODE and a hydraulic pressure gauge.
Using EPC in the BENCH MODE will confirm that the EPC is working at both the higher and lower
pressures.
The OSC functions for the parameter EPC allows the technician to choose the following options:
zEPC - activates EPC to selected values
z 00 - sets EPC pressure to 00 kPa (00 psi).
z 15 - sets EPC pressure to 103 kPa (15 psi).
z 30 - sets EPC pressure to 206 kPa (30 psi).
z 45 - sets EPC pressure to 310 kPa (45 psi).
z 60 - sets EPC pressure to 411 kPa (60 psi).
z 75 - sets EPC pressure to 517 kPa (75 psi).
z 90 - sets EPC pressure to 620 kPa (90 psi).
OSC "EPC" DRIVE MODE operates ONLY when:
zthe digital TR sensor is operational and no digital TR sensor DTCs are present.
z the vehicle speed sensor is operational and no VSS sensor DTCs are present.
z the transmission range selector lever is in O/D.
z the pressure gauge is installed.
z the key is ON.
z the engine is ON.
z the vehicle speed is greater than 3.2 km/h (2 mph).
z the OSC value for EPC must be greater than what the PCM commands (see EPC PID).
OSC Command Values
z00 - sets EPC pressure to 00 kPa (00 psi).
z 15 - sets EPC pressure to 103 kPa (15 psi).
z 30 - sets EPC pressure to 206 kPa (30 psi).
z 45 - sets EPC pressure to 310 kPa (45 psi).
z 60 - sets EPC pressure to 411 kPa (60 psi).
z 75 - sets EPC pressure to 517 kPa (75 psi).
z 90 - sets EPC pressure to 620 kPa (90 psi).
z XXX - cancels OSC value sent.
z SEND - sends the values to PCM.
DRIVE MODE Procedure for EPC.
Follow operating instructions from the scan tool menu screen.
zSelect "Output State Control."
z Select "Trans - Drive Mode."
z Select "PIDs" to be monitored. Klj . 7 ba
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DIAGNOSIS AND TESTING
Transmission Drive Cycle Test
NOTE:
Always drive the vehicle in a safe manner according to driving conditions and obey all traffic
laws.
NOTE: The Transmission Drive Cycle Test must be followed exactly. Malfunctions must occur four
times consecutively for shift error DTC code to be set, and five times consecutively for continuous TCC
code to set.
NOTE: When carrying out the Transmission Drive Cycle Test, refer to the Solenoid Application Chart
for correct solenoid operation.
After carrying out the Quick Test, use the Transmission Drive Cycle Test for checking continuous
codes.
1. Record and then erase Quick Test codes.
2. Warm engine to normal operating temperature.
3. Make sure transmission fluid level is correct.
4. With transmission in OVERDRIVE, moderately accelerate from stop to 80 km/h (50 mph). This allows the transmission to shift into fourth gear. Hold speed and throttle open steady for a
minimum of 15 seconds.
5. With transmission in fourth gear and maintaining steady speed and throttle opening, lightly apply and release brake to operate stoplamps. Then hold speed and throttle steady for a
minimum of five seconds.
6. Brake to a stop and remain stopped for a minimum of 20 seconds.
7. Repeat steps 4 through 6 at least five times.
8. Carry out Quick Test and record continuous DTCs. zIf the DTCs are still present, refer to the Diagnostic Trouble Code Chart. Repair all non
transmission DTCs first as they can directly affect the operation of the transmission.
Repeat the Quick Test and the Road Test to verify the correction. Erase the DTCs, carry
out the Drive Cycle Test and repeat the Quick Test after completing repair on the DTC.
z If the continuous test passes and a concern is still present, refer to Diagnosis By Symptom in this section, OASIS messages, and TSBs for concerns.
After On- Board Diagnostic
NOTE: The vehicle wiring harness, PCM and non- transmission sensors may affect transmission
operations. Repair these concerns first.
After the on- board diagnostic procedures are completed, repair all DTCs.
Begin with non- transmission related DTCs, then repair any transmission related DTCs. Use the
diagnostic trouble code chart for information on condition and symptoms. This chart will be helpful in
referring to the correct manual(s) and aids in diagnosing internal transmission concerns and external
non- transmission inputs. The pinpoint tests are used in diagnosing transmission electrical concerns.
Make sure that the vehicle wiring harness and the PCM are diagnosed as well. The Powertrain SECTION 307-
01: Automatic Transaxle/Transmission 2003 Mustang Workshop Manual Klj . 1 ba
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P0713 TFT, wiring,
PCM -40°C (-
40°F)
indicated TFT
sensor circuit
open Voltage drop
across TFT sensor
exceeds scale set
for temperature -
40°C (-
40°F). Firm shift feel. Go To Pinpoint
Test B .
P1710 TFT TFT sensor in
range
malfunction PCM detected
TFT not changing. Firm shift, TCIL
flashing, increase in
EPC. Go To Pinpoint
Test B .
P1711 TFT TFT out of on-
board
diagnostic
range Transmission not
at operating
temperature
during on-
board
diagnostic. Warm vehicle to
normal operating
temperature. Go To Pinpoint
Test B .
P1713 TFT wiring
PCM TFT
continually
reading cold TFT sensor in
range low failure. Firm shift feel.
Substitute ECT for
TFT Go To Pinpoint
Test B .
P1718 TFT, wiring,
PCM TFT
continually
reading hot TFT sensor in
range high failure. Firm shift feel.
Substitute ECT for
TFT Go To Pinpoint
Test B .
P1783 TFT Transmission
over
temperature
condition
indicated Transmission fluid
temperature
exceeded 127°C
(270°F). Increase in EPC
pressure. Go To Pinpoint
Test B .
P0720 OSS Insufficient
input from
output shaft
speed sensor PCM detected a
loss of OSS signal
during operation. Harsh shifts,
abnormal shift
schedule, no torque
converter clutch
activation. Go To Pinpoint
Test E .
P0721 OSS OSS sensor
signal noisy PCM has detected
an erratic OSS
signal. Harsh shifts,
abnormal shift
schedule, no torque
converter clutch
engagement. Go To Pinpoint
Test E .
P0722 OSS wiring Insufficient
input from
OSS PCM has detected
a loss of OSS
signal. Harsh shifts,
abnormal shift
schedule, no torque
converter clutch
engagement. Go To Pinpoint
Test E .
P0741
** TCC,
internal
components TCC slippage
detected The PCM picked
up an excessive
amount of
slippage during
normal vehicle
operation. TCC
slippage/erratic or
no torque converter
clutch operation.
Flashing
Transmission
Control Indicator
Lamp (TCIL). GO to
Diagnosis By Symptom .
P0743
* TCC, wiring,
PCM TCC solenoid
circuit failure
during on-
board
diagnostic TCC solenoid
circuit fails to
provide voltage
drop across
solenoid. Circuit
open or shorted or
PCM driver failure
during on-
board
diagnostic. Short circuit: engine
stalls in second
(OD, 2 range) at
low idle speeds with
brake applied.
Open circuit: torque
converter clutch
never engages. Go To Pinpoint
Test A .
P1746 EPC, wiring, Shorted PCM Voltage through Open circuit causes Go To Pinpoint Klj . 3 ba
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*
PCM output driver EPC solenoid is
checked. An error
will be noted if
tolerance is
exceeded. maximum EPC
pressure, harsh
engagements and
shifts. Test D .
P1747
* EPC, wiring,
PCM EPC solenoid
circuit failure,
shorted circuit
or output
driver Voltage through
EPC solenoid is
checked. An error
will be noted if
tolerance is
exceeded. Short circuit causes
minimum EPC
pressure (minimum
capacity) and limits
engine torque
(alternate firm). Go To Pinpoint
Test D .
P1760 EPC, wiring,
PCM EPC solenoid
circuit failure,
shorted circuit
or output
driver PCM detected a
loss of EPC during
operation. Unexpected
reduction in engine
torque. Go To Pinpoint
Test D .
P0750
a SSA, wiring,
PCM SSA solenoid
circuit failure SSA circuit failed
to provide voltage
drop across
solenoid. Circuit
open or shorted or
PCM driver failure
during on-
board
diagnostic. Incorrect gear
selection depending
on condition mode
and manual lever
position. See
Solenoid On/Off
Chart. Go To Pinpoint
Test A .
P0753 SSA, wiring,
PCM SSA electrical
circuit failure SSA circuit fails to
provide voltage
drop across
solenoid. Circuit
open or shorted or
PCM driver failure
during on-
board
diagnostic. Incorrect gear
depending on
condition mode and
manual lever
position. See
Solenoid Off/On
Chart. Flashing
Transmission
Control Indicator
Lamp (TCIL). Go To Pinpoint
Test A .
P0751 SSA, wiring,
PCM Shift solenoid
A functional
failure Mechanical or
hydraulic failure of
the shift solenoid. Incorrect gear
selection depending
on failure mode
manual lever
position. REFER to Solenoid
Operation Chart.
Go To Pinpoint
Test A .
P0781
b SSA or
internal parts 1-
2 shift error Engine rpm drop
not detected when
1-
2 shift was
commanded by
PCM. Incorrect gear
selection depending
on failure or mode
and manual lever
position. Shift errors
may also be due to
other internal
transmission
concerns (stuck
valves, damaged
friction material). REFER to Solenoid
Operation Chart.
Go To Pinpoint
Test A .
P1714 SSA,
internal
components SSA
malfunction Mechanical failure
of the solenoid
detected. Incorrect gear
selection depending
on condition, mode
and manual lever
position. See
Solenoid Operation
Chart. Go To Pinpoint
Test F .
P0755
a SSB, wiring,
PCM SSB solenoid
circuit failure SSB circuit fails to
provide voltage Incorrect gear
selection depending Go To Pinpoint
Test A . Klj . 4 ba
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drop across
solenoid. Circuit
open or shorted or
PCM driver failure
during on-
board
diagnostic. on condition mode
and manual lever
position. See
Solenoid On/Off
Chart.
P0756 SSB Shift solenoid
B functional
failure Mechanical or
hydraulic failure of
the shift solenoid. Incorrect gear
selection depending
on failure mode and
manual lever
position. REFER to Solenoid
Operation Chart.
Go To Pinpoint
Test A .
P1715 SSB SSB
malfunction Mechanical failure
of the solenoid
detected. Incorrect gear
selection depending
on condition, mode
and manual lever
position. See
Solenoid Operation
Chart. Go To Pinpoint
Test F .
P0758 SSB, wiring,
PCM SSB electrical
circuit failure SSB circuit fails to
provide voltage
drop across
solenoid. Circuit
open or shorted or
PCM driver failure
during on-
board
diagnostic. Incorrect gear
depending on
condition mode and
manual lever
position. See
Solenoid Off/On
Chart. Flashing
Transmission
Control Indicator
Lamp (TCIL). Go To Pinpoint
Test A .
P0782
b SSA, SSB or
internal parts 2-
3 shift error Engine rpm drop
not detected when
2-
3 shift was
commanded by
PCM. Incorrect gear
selection depending
on failure or mode
and manual lever
position. Shift errors
may also be due to
other internal
transmission
concerns (stuck
valves, damaged
friction material). REFER to Solenoid
Operation Chart.
Go To Pinpoint
Test A .
P0783
b SSA, SSB or
internal parts 3-
4 shift error Engine rpm drop
not detected when
3-
4 shift was
commanded by
PCM. Incorrect gear
selection depending
on failure or mode
and manual lever
position. Shift errors
may also be due to
other internal
transmission
concerns (stuck
valves, damaged
friction material). REFER to Solenoid
Operation Chart.
Go To Pinpoint
Test A .
P1116 ECT ECT out of on-
board
diagnostic
range ECT temperature
higher or lower
than expected
during KOEO and
KOER. Rerun on-
board
diagnostic at
normal operating
temperature. REFER to the
Powertrain
Control/Emissions
Diagnosis (PC/ED)
manual.
P1124 TP TP voltage
high/low for
on-
board
diagnostic TP was not in the
correct position for
on-
board
diagnostic. Rerun at
appropriate throttle
position per
application. REFER to the
Powertrain
Control/Emissions
Diagnosis (PC/ED) Klj . 5 ba
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manual.
P1460 A/C A/C clutch
cycling
pressure
switch error A/C or defrost on
condition may
result from A/C
clutch being on
during on-
board
diagnostic. DTC set during on-
board diagnostic,
repeat with A/C off.
Failed on, EPC
pressure slightly
low with A/C OFF. REFER to the
Powertrain
Control/Emissions
Diagnosis (PC/ED)
manual.
P1636 PCM PCM detected
internal error — — REFER to the
Powertrain
Control/Emissions
Diagnosis (PC/ED)
manual.
P1703 BPP BPP switch
circuit failed. Brake ON/OFF
circuit failure. Failed ON or not
connected —
torque converter
clutch will not
engage at less than
1/3 throttle. Failed
OFF or not
connected —
torque converter
clutch will not
disengage when
brake is applied. REFER to the
Powertrain
Control/Emissions
Diagnosis (PC/ED)
manual.
P1703 BPP Brake not
actuated
during on-
board
diagnostic Brake not cycled
during KOER. Failed OFF or not
connected —
torque converter
clutch will not
engage at less than
1/3 throttle. Failed
OFF or not
connected —
torque converter
clutch will not
disengage when
brake is applied. REFER to the
Powertrain
Control/Emissions
Diagnosis (PC/ED)
manual.
P0740 TCC, wiring,
PCM TCC electrical
circuit failure TCC circuit fails to
provide voltage
drop across
solenoid. Circuit
open or shorted or
PCM driver failed
during on-
board
diagnostic. Short circuit: engine
stalls in second
(OD, 2 range) at
low idle speeds with
brake applied.
Open circuit: torque
converter clutch
never engages.
Flashing
Transmission
Control Indicator
Lamp (TCIL). Go To Pinpoint
Test A .
P1740 TCC TCC
malfunction Mechanical failure
of the solenoid
detected. Failed ON —
Engine stalls in 2nd
(O/D, Manual 2
ranges) at low idle
speeds with brake
applied. Failed OFF
—
Torque
Converter never
applies. Go To Pinpoint
Test F .
P1741
b TCC,
internal Excessive
torque Excessive
variations in slip Engine rpm
oscillation is Go To Pinpoint
Test A . Klj . 6 ba
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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
82003 Mustang Workshop Manual
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