2003 FORD MUSTANG test G

The Diagnosis by Symptom charts give the technician diagnostic information, direction, and suggest
possible components, using a symptom as a starting point.
The Diagnosis by Symptom charts are divided into two categories: Electrical Routines, indicated by
200 series numbers, and Hydraulic/Mechanical Routines, indicated by 300 series numbers. The
Electrical Routines list the possible electrical components that could cause or contribute to the
symptom described. The Hydraulic/Mechanical Routines list the possible hydraulic or mechanical
components that could cause or contribute to the symptom described.
Diagnosis by Symptom Chart Directions
1. Using the Diagnosis by Symptom Index, select the Concern/Symptom that best describes the condition.
2. Refer to the routine indicated in the Diagnosis by Symptom Index.
3. Always begin diagnosis of a symptom with:
a. preliminary inspections.
b. verifications of condition. c. checking the fluid levels.
d. carrying out other test procedures as directed.
4. NOTE: Not all concerns and conditions with electrical components will set a diagnostic trouble
code (DTC). Be aware that the components listed may still be the cause. Verify correct function
of these components prior to proceeding to the Hydraulic/Mechanical Routine listed.
Begin with the Electrical Routine, if indicated. Follow the reference or action required
statements. Always carry out the on- board diagnostic tests as required. Never skip steps.
Repair as required. If the concern is still present after electrical diagnosis, then proceed to the
Hydraulic/Mechanical Routine listed.
5. The Hydraulic/Mechanical Routines list possible hydraulic or mechanical components that could cause the concern. These components are listed in the removal sequence and by most
probable cause. All components listed must be inspected to ensure correct repair. 105-
R0057 or equivalent UV Leak Detector Kit
164-
R0756 or equivalent
Diagnosis by Symptom Index Title Routines
Electrical
a Hydraulic/
Mechanical Klj . 2 ba
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·
Seals, piston damaged ·
Inspect for damage. Repair as required. ·
Check ball missing or
damaged ·
Friction elements damaged
or worn Low/Reverse Band
·
Band, servo, anchor pins
damaged or worn ·
Inspect for damage. Repair as required.
Engagement Concern: Harsh Reverse Possible Component Reference/Action
203 —
ELECTRICAL ROUTINE Powertrain Control System
·
Electrical inputs/outputs,
vehicle wiring harnesses,
PCM, TFT sensor, EPC
solenoid ·
Carry out Self-Test; refer to the Powertrain Control/Emissions
Diagnosis (PC/ED) manual for diagnosis and testing of the
Powertrain Control System. Carry out engagement test, EPC test
and Go To Pinpoint Test B or
Go To Pinpoint Test D . Check idle
speed. Repair as required. Clear DTCs, road test and repeat Self-
Test. 303 —
HYDRAULIC/MECHANICAL ROUTINE Fluid
·
Incorrect level ·
Adjust fluid to correct level. ·
Condition ·
Inspect condition of fluid. Engine Driveline
·
Looseness in the
driveshaft, U- joints or the
engine mounts ·
Repair as required. Shift Linkage
·
Damaged or incorrectly
adjusted ·
Inspect and repair as required. Verify transmission shift cable
adjustment; refer to Section 307 - 05 . Adjust transmission shift
cable as necessary. After repairing transmission shift cable, verify
that the digital TR sensor is correctly adjusted. Adjust the digital
TR sensor as necessary. Incorrect Pressures
·
High line pressure, high
EPC pressure ·
Check pressure at line and EPC pressure taps; refer to Line
Pressure Chart for specifications. If high, check the following
components: main controls, oil filter and seal assembly. Fluid Filter and Seal
Assembly
·
Plugged or damaged ·
Install a new filter and seal assembly. ·
Filter seal damaged Main Controls
·
No. 6 shuttle ball, No. 5
check ball, manual valve,
main regulator valve stuck,
damaged or missing ·
Inspect for damage. Repair as required. ·
Bolts not tightened to
specifications ·
Tighten bolts to specifications. Klj . 6 ba
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·
Gasket damaged ·
Inspect for damage and install a new gasket. ·
EPC solenoid stuck or
damaged ·
Inspect for damage, contamination. Carry out EPC test in Routine
No. 203. Repair as required. Low Reverse Servo
·
Seals (piston and cover)
damaged ·
Inspect for damage. Repair as required. ·
Servo cover retaining ring
assembled incorrectly ·
Anchor pins (case)
damaged Pump Assembly
·
Bolts not tightened to
specifications ·
Tighten bolts to specifications. ·
Porosity/cross leaks ·
Inspect pump assembly. Install new as required. ·
Gasket damaged ·
Inspect for damage and install a new gasket. ·
No. 1 and No. 2 seal rings
damaged ·
Inspect for damage. Repair as required. Reverse Clutch Assembly
·
Seals, piston damaged ·
Inspect for damage. Repair as required. ·
Check ball missing or
damaged ·
Friction elements
damaged, worn ·
Return spring piston
damaged, worn Low Reverse Band
·
Band, servo, anchor pin
damaged or worn ·
Inspect for damage. Repair as required.
Engagement Concern: Harsh Forward Possible Component Reference/Action
204 —
ELECTRICAL ROUTINE Powertrain Control
System
·
Electrical inputs/outputs,
vehicle wiring
harnesses, PCM, TFT
sensor, EPC solenoid ·
Carry out Self- Test; refer to the Powertrain Control/Emissions
Diagnosis (PC/ED) manual for diagnosis and testing of the
Powertrain Control System. Carry out engagement test and EPC
test. Go To Pinpoint Test B or
Go To Pinpoint Test D . Check idle
speed. Repair as required. Clear DTCs, road test and repeat Self-
Test. 304 —
HYDRAULIC/MECHANICAL ROUTINE Fluid
·
Incorrect level ·
Adjust fluid to correct level. ·
Condition ·
Inspect condition of fluid. Engine Driveline
·
Looseness in the
driveshaft, U- joints or ·
Repair as required. Klj . 7 ba
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the engine mounts
Incorrect Pressures
·
High forward clutch
pressure, high line
pressure, high EPC
pressure ·
Check pressure at line, EPC and forward pressure taps. Refer to
Line Pressure Chart for specifications. If pressures are high, check
the following possible components: main controls, pump assembly. Main Controls
·
Main regulator valve
stuck, damaged ·
Inspect and repair as required. ·
Bolts not tightened to
specifications ·
Tighten bolts to specifications. ·
Gaskets damaged ·
Inspect for damage and install a new gasket. ·
EPC solenoid stuck or
damaged ·
Inspect for damage or contamination. Carry out EPC test in Routine
204. Repair as required. Case
·
2- 3 accumulator
seal/retainer stuck,
damaged ·
Inspect for damage. Repair as required. Pump Assembly
·
Bolts not tightened to
specifications ·
Tighten bolts to specifications. ·
Porosity/cross leaks ·
Inspect for porosity/leaks. Install a new pump as required. ·
Gaskets damaged ·
Inspect for damage and install a new gasket. Forward Clutch Assembly
·
Check balls missing or
damaged ·
Inspect for mislocation, poor seating, damage. Install a new forward
clutch cylinder. ·
Friction element
damaged or worn ·
Inspect for damage. Repair as required. ·
Forward clutch wave
spring damaged ·
Inspect for damage. Repair as required. ·
Forward clutch return
spring damaged ·
Inspect for damage. Repair as required.
Engagement Concern: Delayed/Soft Reverse Possible Component Reference/Action
205 —
ELECTRICAL
ROUTINE ·
No Electrical Concerns 305 —
HYDRAULIC/MECHANICAL ROUTINE Fluid
·
Incorrect level ·
Adjust fluid to correct level. ·
Condition ·
Inspect condition of fluid. Shift Linkage
·
Damaged or incorrectly
adjusted ·
Inspect and repair as required. Verify transmission shift cable
adjustment; refer to Section 307 - 05 . Adjust transmission shift cable
as necessary. After repairing transmission shift cable, verify that the
digital TR sensor is correctly adjusted. Adjust the digital TR sensor Klj . 8 ba
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Shift Concerns: Some/All Shifts Missing
Possible Component Reference/Action
210 —
ELECTRICAL ROUTINE Powertrain Control System
·
Electrical inputs/outputs,
vehicle wiring harnesses, PCM,
shift solenoids, output shaft
speed (OSS) sensor, digital TR
sensor ·
Carry out Self-Test; refer to the Powertrain Control/Emissions
Diagnosis (PC/ED) manual for diagnosis and testing of the
Powertrain Control System. Go To Pinpoint Test A ,
Go To Pinpoint Test C or
Go To Pinpoint Test E . Repair as
required. Clear DTCs, road test and repeat Self- Test. 310 —
HYDRAULIC/MECHANICAL ROUTINE Fluid
·
Incorrect level ·
Adjust fluid to correct level. ·
Condition ·
Inspect condition of fluid. Shift Linkage, Digital TR Sensor
·
Damaged or incorrectly
adjusted ·
Inspect and repair as required. Verify transmission shift cable
adjustment; refer to Section 307 - 05 . Adjust transmission shift
cable as necessary. After repairing transmission shift cable,
verify that the digital TR sensor is correctly adjusted. Adjust
the digital TR sensor as necessary. ·
Refer to the following shift routine(s) for further diagnosis:
„ Shift 1- 2, Routine 220/320
„ Shift 2- 3, Routine 221/321
„ Shift 3- 4, Routine 222/322
„ Shift 4- 3, Routine 223/323
„ Shift 3- 2, Routine 224/324
„ Shift 2- 1, Routine 225/325
Shift Concerns: Timing Concerns — Early/Late Possible Component Reference/Action
211 —
ELECTRICAL ROUTINE Powertrain Control System
·
Electrical inputs/outputs,
vehicle wiring harnesses,
PCM, shift solenoids, EPC
solenoid, TFT sensor, OSS ·
Carry out Self- Test. Refer to the Powertrain Control/Emissions
Diagnosis (PC/ED) manual for diagnosis and testing of the
Powertrain Control System. Go To Pinpoint Test A ,
Go To Pinpoint Test C or
Go To Pinpoint Test E . Repair as required.
Clear DTCs, road test and repeat Self- Test. 311 —
HYDRAULIC/MECHANICAL ROUTINE Other
·
Tire size change, axle ratio
change ·
Verify vehicle has original equipment. Refer to Certification
Label and Safety Standard Certification Label. Changes in tire
size or axle ratio will affect shift timing. Fluid
·
Incorrect level ·
Adjust fluid to correct level. ·
Condition ·
Inspect condition of fluid. Powertrain Control System
·
Engine driveability concerns ·
Refer to Routine 253. Klj . 11 ba
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Incorrect Pressures
·
Line pressure, EPC pressure ·
Check pressure at line and EPC taps; refer to Line Pressure
Chart for specifications. If not OK, check the main controls. If
OK, refer to the shift routine(s) for further diagnosis:
„ Shift 1- 2, Routine 320
„ Shift 2- 3, Routine 321
„ Shift 3- 4, Routine 322
„ Shift 4- 3, Routine 323
„ Shift 3- 2, Routine 324
„ Shift 2- 1, Routine 325 Main Controls
·
EPC solenoid, stuck or
damaged hydraulically or
mechanically ·
Inspect for damage, contamination. Carry out EPC tests in
Routine No. 211. Repair as required. ·
Valves, accumulators, seals
stuck or damaged or
assembled incorrectly ·
Inspect for damage. Repair as required. ·
Gaskets damaged ·
Inspect for damage and install a new gasket. ·
Solenoid screen blocked or
damaged ·
Clean or install a new screen.
Shift Concerns: Timing Concerns — Erratic/Hunting Possible Component Reference/Action
212 —
ELECTRICAL ROUTINE Powertrain Control System
·
Electrical inputs/outputs, vehicle
wiring harnesses, PCM, shift
solenoids, torque converter clutch
(TCC) solenoid, digital TR sensor,
output shaft speed (OSS) ·
Carry out Self- Test. Refer to the Powertrain
Control/Emissions Diagnosis (PC/ED) manual for
diagnosis. Go To Pinpoint Test A ,
Go To Pinpoint Test C or
Go To Pinpoint Test E . Repair as required. Clear
DTCs, road test and repeat Self- Test. ·
Poor engine performance ·
Refer to Routine 253. 312 —
HYDRAULIC/MECHANICAL ROUTINE Fluid
·
Incorrect level ·
Adjust fluid to correct level. ·
Condition ·
Inspect condition of fluid. Main Controls
·
Valves, accumulators, seals,
assembled wrong, stuck or
damaged ·
Inspect for damage. Repair as required. ·
Gaskets damaged ·
Inspect for damage and install a new gasket. ·
Solenoid screen blocked or
damaged ·
Clean or install a new screen. Torque Converter Clutch
·
Torque converter ·
Refer to Torque Converter Operation Concerns:
Cycling/Shudder/Chatter Hydraulic/Mechanical Routine
342. Specific Shifts
·
Refer to the following shift routine(s) for further diagnosis: Klj . 12 ba
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„
Shift 1- 2, Routine 320
„ Shift 2- 3, Routine 321
„ Shift 3- 4, Routine 322
„ Shift 4- 3, Routine 323
„ Shift 3- 2, Routine 324
„ Shift 2- 1, Routine 325
Shift Concerns: Feel — Soft/Slipping Possible Component Reference/Action
213 —
ELECTRICAL ROUTINE Powertrain Control System
·
Electrical inputs/outputs,
vehicle wiring harnesses,
PCM, EPC solenoid, OSS ·
Carry out Self- Test. Refer to the Powertrain Control/Emissions
Diagnosis (PC/ED) manual for diagnosis and testing of the
Powertrain Control System. Go To Pinpoint Test D or
Go To Pinpoint Test E . Repair as required. Clear DTCs, road test and
repeat Self- Test. ·
Engine driveability concerns ·
Refer to Routine 253. 313 —
HYDRAULIC/MECHANICAL ROUTINE Fluid
·
Incorrect level ·
Adjust fluid to correct level. ·
Condition ·
Inspect condition of fluid. Incorrect Pressures
·
Low line pressure, low EPC
pressure ·
Check pressures at line and EPC taps; refer to Line Pressure
Chart for specifications. If pressures are low or all shifts are
soft/slipping, go to main controls. If pressures are OK and a
specific shift is soft/slipping, refer to the following routine(s) for
further diagnosis:
„ Shift 1- 2, Routine 320
„ Shift 2- 3, Routine 321
„ Shift 3- 4, Routine 322
„ Shift 4- 3, Routine 323
„ Shift 3- 2, Routine 324
„ Shift 2- 1, Routine 325 Main Controls
·
Main regulator valve,
overdrive servo regulator
valve stuck, damaged or
assembled incorrectly ·
Inspect for damage. Repair as required. ·
EPC solenoid stuck or
damaged ·
Inspect for damage and contamination. Carry out EPC tests in
Routine 213. Repair as required. Case
·
1- 2 accumulator stuck or
damaged ·
Inspect for damage. Repair as required. Filter and Seal Assembly
·
Filter plugged, damaged ·
Inspect for damage. Install a new filter as required. ·
Seal damaged or cut ·
Inspect for damage. Replace as required. Klj . 13 ba
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Shift Concerns: Feel —
Harsh Possible Component Reference/Action
214 —
ELECTRICAL ROUTINE Powertrain Control System
·
Electrical inputs/outputs,
vehicle wiring harnesses,
PCM, EPC solenoid, OSS ·
Carry out Self- Test. Refer to the Powertrain Control/Emissions
Diagnosis (PC/ED) manual for diagnosis and testing of the
Powertrain Control System. Go To Pinpoint Test D or
Go To Pinpoint Test E . Repair as required. Clear DTCs, road test and
repeat Self- Test. ·
Engine driveability concerns ·
Refer to Routine 253. 314 —
HYDRAULIC/MECHANICAL ROUTINE Fluid
·
Incorrect level ·
Adjust fluid to correct level. ·
Condition ·
Inspect condition of fluid. Incorrect Pressures
·
High line pressure, high EPC
pressure ·
Check pressures at line and EPC taps. See the to Line Pressure
Chart for specifications. If pressures are high or all shifts are
harsh, go to Main Controls. If pressures are OK and a specific
shift is harsh, refer to the following shift routine(s) for further
diagnosis:
„ Shift 1- 2, Routine 320
„ Shift 2- 3, Routine 321
„ Shift 3- 4, Routine 322
„ Shift 4- 3, Routine 323
„ Shift 3- 2, Routine 324
„ Shift 2- 1, Routine 325 Main Controls
·
Main regulator valve,
overdrive servo regulator
valve stuck, damaged or
assembled incorrectly ·
Inspect for damage. Repair as required. ·
EPC solenoid stuck or
damaged ·
Inspect for damage or contamination. Carry out EPC tests in
Routine 214. Repair as required.
Shift Concerns: No 1st Gear, Engages In Higher Gear Possible Component Reference/Action
215 —
ELECTRICAL ROUTINE Powertrain Control System
·
Electrical inputs/outputs, vehicle
wiring harnesses, PCM, shift
solenoids, digital transmission
range TR sensor ·
Carry out Self- Test. Refer to the Powertrain
Control/Emissions Diagnosis (PC/ED) manual for diagnosis
and testing of the Powertrain Control System. Go To Pinpoint Test A or
Go To Pinpoint Test C . Repair as
required. Clear DTCs, road test and repeat Self- Test. 315 —
HYDRAULIC/MECHANICAL ROUTINE Shift Linkage, Digital TR Sensor
·
Damaged or incorrectly adjusted ·
Inspect and repair as required. Verify transmission shift cable
adjustment. Refer to Section 307 - 05 . Adjust transmission
shift cable as necessary. After repairing transmission shift
cable, verify that the digital TR sensor is correctly adjusted. Klj . 14 ba
312003 Mustang Workshop Manual
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