Diagnostic Routine 204/304 - Engagement Concern: Harsh Forward

WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.

ENGAGEMENT CONCERN: HARSH FORWARD

Possible Component	Reference/Action
204 - ELECTRICAL ROUTINE
Powertrain Control System
Electrical Inputs/Outputs, Vehicle Wiring Harnesses, Powertrain Control Module (PCM), TP, MAF, IAT, ISC, OSS, PSP, EPC, TFT, TSS, Internal Harness	Run On-Board Diagnostic. Refer to INTRODUCTION - CNG, FLEX-FUEL & GASOLINE for diagnosis. Go To PINPOINT TEST B: TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR , Go To PINPOINT TEST D: DIGITAL TRANSMISSION RANGE (TR) SENSOR or Go To PINPOINT TEST F: TURBINE SHAFT SPEED (TSS) SENSOR . Refer to PINPOINT TESTS - NON OSC EQUIPPED VEHICLES .
304 - HYDRAULIC/MECHANICAL ROUTINE
Incorrect Pressures
High line pressure, high EPC pressure	Carry out Line Pressure Test. Refer to SPECIAL TESTING PROCEDURES .
Check pressure at line and EPC pressure taps. See the LINE PRESSURE CHART . If pressures are high, check the following possible components: Main Controls, Pump Assembly.
Main Controls
Bolts out of torque specification	Tighten bolts to specification.
Gaskets and Separator Plate - damaged, of location	Inspect for damage. Install new as required.
Main Regulator Valve, Pressure Fail-safe Valve	Inspect. Repair as required.
B3 Check Ball - damaged, missing	Inspect for damage and contamination. Repair as required.
Pump Assembly
Bolts out of torque specification	Tighten bolts to specification.
Gaskets and Separator - damaged, off location	Inspect for damage. Install new as required.
EPC Solenoid - stuck, damaged	Inspect for damage and contamination. Repair as required. Activate solenoid using transmission tester. If solenoid operation cannot be felt when placing hand on solenoid, install a new solenoid. Inspect O-rings for damage. Repair as required.
Low Intermediate Clutch Assembly
Seals, Piston -worn, damaged	Carry out Air Pressure Test. Refer to SPECIAL TESTING PROCEDURES .
Friction Element - damaged	Inspect for damage. Install new as required.
Wave Spring - damaged	Inspect for damage. Install new as required.
Neutral-to-Drive Accumulator
Piston - stuck, Seals or Springs, - missing, damaged	Check for damage. Install new as required.