2003 FORD MUSTANG pinpoint

*
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
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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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Any time an electrical connector or solenoid body is disconnected, inspect the connector for pin
condition, corrosion and contamination. Also inspect the connector seal for damage. Clean, repair or
install a new connector as required.
Shift Solenoids Pre-Diagnosis
Use the following shift solenoid operation information when carrying out Pinpoint Test A.
a When a manual pull- in occurs above a calibrated speed the transmission will downshift from the
higher gear until the vehicle speed drops below this calibrated speed.
EC = Electronically controlled.
HD = Hydraulically disabled.
Shift Solenoid Failure Mode Chart "Always Off"
Failed off due to powertrain control module and or vehicle wiring concerns, shift solenoid electrically or
hydraulically stuck off. Solenoid Operation Chart Gear Lever Position PCM Commanded Gear Solenoids
SSA SSB TCC
P/R/N 1 ON OFF HD
(D) 1 ON OFF HD
(D) 2 OFF OFF EC
(D) 3 OFF ON EC
(D) 4 ON ON EC
(D)
w/OD OFF
1 1 ON OFF HD
2 2 OFF OFF EC
3 3 OFF ON EC
Manual 2 2 OFF OFF EC
Manual 1 1 ON OFF HD
1
a 2 OFF OFF EC
SSA ALWAYS OFF: Gear Lever Position
(D) 2 1
PCM Gear
Commanded Actual Gear
Obtained
1 2 2 2
2 2 2 2
3 3
2
a 2
a 4 3
2
a 2
a Klj . 2 ba
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a
No engine braking.
Shift Solenoid Failure Mode Chart "Always On"
Failed on due to powertrain control module and or vehicle wiring concerns, shift solenoid electrically or
hydraulically stuck on.
a No engine braking.
a No engine braking.
PINPOINT TEST A: SHIFT AND TORQUE CONVERTER CLUTCH
SOLENOIDS SSB ALWAYS OFF: Gear Lever Position
(D) 2 1
PCM Gear
Commanded Actual Gear
Obtained
1 1 1 1
2 2 2 2
3 2 2 2
4 1 1 1
SSA ALWAYS ON: Gear Lever Position
(D) 2 1
PCM Gear
Commanded Actual Gear
Obtained
1 1 1 1
2 1 1 1
3 4
2
a 2
a 4 4
2
a 2
a SSB ALWAYS ON: Gear Lever Position
(D) 2 1
PCM Gear
Commanded Actual Gear
Obtained
1 4
2
a 2
a 2 3
2
a 2
a 3 3
2
a 2
a 4 4
2
a 2
a Test Step Result / Action to Take
NOTE:
Read and record all DTCs. All digital TR Sensor and VSS DTCs must be repaired before
entering Output State Control (OSC). NOTE:
Refer to the Transmission Internal Harness illustration preceding these pinpoint tests. Klj . 3 ba
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NOTE:
Refer to the Transmission Vehicle Harness Connector illustration preceding these
pinpoint tests. A1 ELECTRONIC DIAGNOSTICS
z
Select PARK.
z Key in OFF position.
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 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 vehicle enter Trans- Bench Mode? Yes
GO to
A2 .
No
REPEAT procedure to enter
Trans-Bench Mode. If vehicle
did not enter Trans- Bench
Mode, REFER to the Powertrain
Control/Emissions Diagnosis
(PC/ED) manual for diagnosis
of PCM. A2 WIGGLE TEST
z
Select PIDs to be monitored.
z Select "ON" to turn suspect solenoid on.
z Press "SEND".
z Wiggle all wiring and connectors to the transmission.
Monitor the Solenoid State for changes.
z Select "OFF" to turn solenoid off.
z Press "SEND".
z Does the suspect solenoid(s) fault state change? PID Command PID Actual
SSA SS1F
SSB SS2F
TCC TCCF Yes
REPAIR open or short in the
vehicle harness or connector.
No
GO to
A3 .
A3 SOLENOID FUNCTIONAL CHECK
z
Monitor each solenoid state.
z Turn each solenoid ON and OFF.
z Does the solenoid turn ON and OFF when
commanded and can solenoid activation be heard? Yes
GO to
A4 .
No
GO to A5 .
A4 OSC TRANS-
DRIVE MODE (GR_CM OR TCC) z
Carry out OSC Trans- Drive Mode.
z Select GR_CM for Shift Solenoids or follow procedures
for GR_CM as listed.
z Select TCC for Torque Converter Clutch Solenoid.
Follow procedures of TCC in Drive Mode as listed.
z Does the transmission upshift and downshift or
torque converter engage/disengage when
commanded? 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 to
diagnose shift or torque
converter concern.
No
GO to A5 .
A5 CHECK FOR BATTERY VOLTAGE
z
Remove transmission fluid pan. Yes Klj . 4 ba
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