sensor FORD MUSTANG 2003 Workshop Manual

z
Repair all vehicle speed DTCs.
z Make sure that the vehicle speed sensor and digital TR sensors are functional.
z Select "Active Command Modes."
z Select "Trans - Bench Mode or Trans - Drive Mode."
OSC — Transmission Bench Modes
The following Transmission Bench Modes may be used or required during diagnostics.
SSA, SSB and TCC in BENCH MODE
The BENCH MODE allows the technician to carry out electrical circuit checks on the following
components:
zSSA - activates SSA OFF or ON.
z SSB - activates SSB OFF or ON.
z Transmission converter clutch (TCC) - activates TCC OFF or ON.
OSC "SSA, SSB, TCC" BENCH MODE operates ONLY when:
zthe digital TR sensor is operational and no digital TR sensor DTCs are present.
z the vehicle speed input is operational and no VSS sensor DTCs are present.
z the transmission range selector lever is in P.
z the key is ON.
z the engine is OFF.
OSC Command Values
zOFF - turns solenoid OFF.
z ON - turns solenoid ON.
z XXX - cancels OSC value sent.
z SEND - sends the values to PCM.
BENCH MODE Procedure for SSA, SSB and TCC
Follow operating instructions from the scan tool menu screen:
zSelect "Output State Control."
z Select "Trans - Bench Mode."
z Select "PIDs" to be monitored.
z Monitor all selected PIDs during test.
z Select "Parameters - SSA, SSB or 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. Klj . 2 ba
92003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_2748/S3B~us~en~ ...

z
Select "XXX" to cancel at any time.
z Press "SEND."
EPC in BENCH MODE
The BENCH MODE is also used to test the functionality of the transmission's electronic pressure
control. During BENCH MODE, the electronic pressure control (EPC) solenoid can ramp up/down in
increments of 103 kPa (15 psi) from zero to 620 kPa (90 psi) and 620 kPa (90 psi) to zero psi.
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).
To carry out an EPC BENCH MODE pressure functionality test, install a pressure gauge in the EPC
port. The following requirements are required to carry out this test:
zVSS and digital TR sensor operational
z No VSS and digital TR sensor DTCs
z Transmission range selector lever in P
z Key ON
z Engine ON
z Engine speed at least 1,500 rpm for accurate EPC pressure measurement
To carry out an EPC BENCH MODE solenoid circuit pinpoint test, the following requirements are
required.
zVSS and digital TR sensor operational
z No VSS and digital TR sensor DTCs
z Transmission range selector lever in P
z Key ON
z Engine OFF
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). Klj . 3 ba
92003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_2748/S3B~us~en~ ...

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.
BENCH MODE Procedure for EPC
Follow operating instructions from the scan tool menu screen:
zSelect "Output State Control."
z Select "Trans - Bench Mode."
z Select "PIDs" to be monitored.
z Monitor all selected PIDs during test.
z Select "Parameters - EPC."
z Select Value "0- 620 kPa (0-90 psi)."
z Press "SEND" to send command.
z Select "XXX" to cancel at any time.
z Press "SEND."
OSC — Transmission DRIVE MODES
The DRIVE MODE allows control of three transmission parameters. Each mode/parameter has a
unique set of vehicle operating requirements that the technician is required to meet before being
allowed to operate OSC. The recommended procedure, when using the DRIVE MODE, is to control
one parameter at a time.
The DRIVE MODE allows the technician to carry out the following functions on the transmission:
zGR_CM - allows upshifts or downshifts.
z TCC - engages or disengages the torque converter clutch.
z EPC - increases/decreases EPC pressure.
GR_CM in DRIVE MODE
This OSC function is used to test the transmission shift functions.
The OSC functions for the GR_CM parameter allows the technician to choose the following options:
z1 - PCM selects 1st gear.
z 2 - PCM selects 2nd gear.
z 3 - PCM selects 3rd gear.
z 4 - PCM selects 4th gear.
OSC "GR_CM" 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. Klj . 4 ba
92003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_2748/S3B~us~en~ ...

z
the engine is ON.
z the TCC is OFF.
z the transmission range selector lever is in O/D.
z the vehicle speed is greater than 3.2 km/h (2 mph).
OSC Command Values
z1 - PCM selects 1st gear.
z 2 - PCM selects 2nd gear.
z 3 - PCM selects 3rd gear.
z 4 - PCM selects 4th gear.
z XXX - cancels OSC value sent.
z SEND - sends the values to PCM.
DRIVE MODE Procedure for GR_CM
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 - GR_CM."
z Select Value "1- 4."
z Press "SEND" to send command.
z Re- Select Value "1- 4."
z Press "SEND" to send command.
z Select "XXX" to cancel at any time.
z Press "SEND."
TCC in DRIVE MODE
This OSC function is used to test whether the torque converter clutch is engaging and disengaging
correctly.
The OSC functions for the TCC parameter allows the technician to choose the following:
zTCC - activates TCC OFF and ON.
z ON - turns TCC solenoid ON.
z OFF - turns TCC solenoid OFF.
OSC "TCC OFF" 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. Klj . 5 ba
92003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_2748/S3B~us~en~ ...

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
92003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_2748/S3B~us~en~ ...

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
92003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_2748/S3B~us~en~ ...

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
22003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_2748/S3B~us~en~ ...

Control/Emissions Diagnosis (PC/ED) manual will aid in diagnosing non-
transmission electronic
components.
Before Pinpoint Tests
NOTE: Prior to entering pinpoint tests, check the PCM wiring harness for tight connections, bent or
broken pins, corrosion, loose wires, correct routing, correct seals and their condition. Check the PCM,
sensors and actuators for damage. Refer to the Powertrain Control/Emissions Diagnosis (PC/ED)
manual.
NOTE: If a concern still exists after electrical diagnosis has been carried out, refer to Diagnosis By Symptom in this section.
If DTCs appear while carrying out the on- board diagnostics, refer to the Diagnostic Trouble Code Charts for the appropriate repair procedure. Prior to entering pinpoint tests, refer to any TSBs and
OASIS messages for transmission concerns. Klj . 2 ba
22003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_2748/S3B~us~en~ ...

P0308
P0320
P0340
P1351-
P1364 Ignition (EI) concerns malfunction which
may cause a
transmission
concern. engagements and
shifts, late WOT
shifts, no torque
converter clutch
engagement. Powertrain
Control/Emissions
Diagnosis (PC/ED)
manual.
P0503
P0500
P1500
P1502 VSS Insufficient
VSS input PCM detected a
loss of vehicle
speed signal
during operation. Possible loss of
speedometer or
speedometer
fluctuation. REFER to the
Powertrain
Control/Emissions
Diagnosis (PC/ED)
manual.
P1702 Digital TR Intermittent
DTC codes
P0705 or
P0708 Refer to DTC
codes P0705 or
P0708 condition. Refer to DTC codes
P0705 or P0708
symptom. Go To Pinpoint
Test C .
P1704 Digital TR Digital TR
circuit reading
in between
gear position
during
KOEO/KOER Digital TR sensor
or shift cable
incorrectly
adjusted; or digital
TR circuit failure. Wrong commanded
EPC pressure.
Digital TR reading
the wrong gear
position. Go To Pinpoint
Test C .
P0705 Digital TR
sensor Digital TR
circuit failure Digital TR circuits,
indicating an
invalid pattern in
TR_D. Condition
caused by a short
to ground or an
open in TR4,
TR3A, TR2, and
or TR1 circuits.
This DTC cannot
be set by an
incorrectly
adjusted digital TR
sensor. Increase in EPC
pressure (harsh
shifts). Defaults to
(D) or D for all gear
positions. In (D)
position trans stuck
in D or manual 2. Go To Pinpoint
Test C .
P0707 Digital TR
sensor,
wiring, PCM Digital TR
sensor circuit
below
minimum
voltage Digital TR sensor,
circuit or PCM
shorted or
grounded. Increase in EPC
pressure. Go To Pinpoint
Test C .
P0708 Digital TR Digital TR
sensor circuit
TR3A open Digital TR sensor
circuit TR3A
reading 2.6v -
5.0v
(open circuit). This
DTC cannot be set
by an incorrectly
adjusted digital TR
sensor. Increase in EPC
pressure. Defaults
to (D)or D for all
gear ranges. Go To Pinpoint
Test C .
P1705 Digital TR
sensor Digital TR self
test was not
carried out in
PARK or
NEUTRAL Vehicle not in
PARK or
NEUTRAL during
on-
board
diagnostic. Rerun on-
board
diagnostic in PARK
or NEUTRAL. Go To Pinpoint
Test C .
P0712 TFT, wiring,
PCM 157°C (315°F)
indicated TFT
sensor circuit
grounded Voltage drop
across TFT sensor
exceeds scale set
for temperature of
157°C (315°F). Firm shift feel. Go To Pinpoint
Test B . Klj . 2 ba
82003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_2748/S3B~us~en~ ...

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
82003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_2748/S3B~us~en~ ...