Ford 2003 Mustang Workshop Manual page 2391

Incorrect Pressures
· Line pressure, EPC pressure
Main Controls
· EPC solenoid, stuck or
damaged hydraulically or
mechanically
· Valves, accumulators, seals
stuck or damaged or
assembled incorrectly
· Gaskets damaged
· Solenoid screen blocked or
damaged
Shift Concerns: Timing Concerns — Erratic/Hunting
Possible Component
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)
· Poor engine performance
312 — HYDRAULIC/MECHANICAL ROUTINE
Fluid
· Incorrect level
· Condition
Main Controls
· Valves, accumulators, seals,
assembled wrong, stuck or
damaged
· Gaskets damaged
· Solenoid screen blocked or
damaged
Torque Converter Clutch
· Torque converter
Specific Shifts
· 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
· Inspect for damage, contamination. Carry out EPC tests in
Routine No. 211. Repair as required.
· Inspect for damage. Repair as required.
· Inspect for damage and install a new gasket.
· Clean or install a new screen.
· Carry out Self-Test. Refer to the Powertrain
Control/Emissions Diagnosis (PC/ED) manual for
diagnosis. Go To Pinpoint Test A
or Go To Pinpoint Test E
DTCs, road test and repeat Self-Test.
· Refer to Routine 253.
· Adjust fluid to correct level.
· Inspect condition of fluid.
· Inspect for damage. Repair as required.
· Inspect for damage and install a new gasket.
· Clean or install a new screen.
· Refer to Torque Converter Operation Concerns:
Cycling/Shudder/Chatter Hydraulic/Mechanical Routine
342.
· Refer to the following shift routine(s) for further diagnosis:
Reference/Action
, Go To Pinpoint Test C
. Repair as required. Clear