2003 FORD MUSTANG test G

z
Resistance/Continuity Test
z Voltage Test - PARK/NEUTRAL, Reversing Lamp, and Optional Circuits Klj . 8 ba
82003 Mustang Workshop Manual
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DIAGNOSIS AND TESTING
Transmission Connector Layouts
Transmission Vehicle Harness Connector
Transmission Internal Harness Connector SECTION 307-
01: Automatic Transaxle/Transmission 2003 Mustang Workshop Manual Pin Number Circuit Circuit Function
1 — NOT USED
2 — Signal Return
3 — Torque Converter Clutch (TCC) Solenoid
4 — Vehicle Power
5 — Transmission Fluid Temperature (TFT) Input
6 — Electronic Pressure Control (EPC) Solenoid
7 — SSA
8 — SSB
9 — NOT USED
10 — NOT USED Klj . 1 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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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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z
Measure the resistance for each solenoid (SSA, SSB or
TCC) as follows:
z Are the resistances correct? Solenoid Resistance (ohms)
SSA 20-
30 SSB 20-
30 TCC 10-
16 A9 CHECK SOLENOID FOR SHORT TO GROUND
z
Check for continuity between engine ground and
appropriate solenoid pin with ohmmeter or other low
current tester. Connection should show infinite
resistance (no continuity).
z Is there continuity? Solenoid Terminal
SSA +/-
SSB +/-
TCC +/- Yes
INSTALL a new solenoid.
No
REFER to
Diagnosis By Symptom in this section for
diagnosis of shift or torque
converter concerns. Klj . 7 ba
222003 Mustang Workshop Manual
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