Section 07-01: Transmission, Automatic—AODE
1994 Mustang Workshop Manual
DIAGNOSIS AND TESTING

Diagnosis by Symptom

 

The Diagnosis by Symptom Charts give the service technician diagnostic information, direction and 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.

 

Directions for Using the Diagnosis by Symptom Charts

  1. Using the index, select the concern/symptom that best describes the condition.
  1. Turn to the routine indicated in the Diagnosis by Symptom Index.
  1. Always begin diagnosis of a symptom by using the following:
    1. Preliminary Inspections.
    1. Verification of Condition.
    1. Check the Fluid Level.
    1. Perform Other Test Procedures as Directed.
  1. Then begin with the Electrical Routine, if indicated. Follow the reference or action required statements. Always perform the On-Board Diagnostic Tests as required. NEVER SKIP STEPS. Service as required. If the concern is still present after electrical diagnosis, then proceed to the Hydraulic/Mechanical Routine listed.

    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 proper function of those components prior to proceeding to the Hydraulic/Mechanical Routine listed.

  1. 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 likely cause. You must inspect all components listed to insure proper service.


Diagnosis By Symptom Index
TITLE ROUTINES
ELECTRICAL (1) HYDRAULIC MECHANICAL
Engagement Concerns    
No Forward 201 301
No Reverse 202 302
Harsh Reverse 203 303
Harsh Forward 204 304
Delayed/Soft Reverse 205 305
Delayed/Soft Forward 206 306
Shift Concerns    
Some/All Shifts Missing 210 310
Timing Concerns    
 —Early/Late 211 311
 —Erratic/Hunting 212 312
Feel    
 —Soft/Slipping 213 313
 —Harsh 214 314
No 1st Gear, Engages in Higher Gear 215 315
No Manual 1st Gear 216 316
No Manual 2nd Gear 217 317
Torque Converter Operation Concerns    
No Apply 240 340
Always Applied/Stalls Vehicle 241 341
Cycling/Shudder/Chatter 242 342
Other Concerns    
No Engine Braking in 2nd Gear, Manual 2nd or Manual 1st Position 250 350
Shift Lever Efforts High 251 351
External Leaks 252 352
Poor Vehicle Performance 253 353
Noise/Vibration—Forward or Reverse 254 354
Engine Will Not Crank 255 355
No PARK Range 256 356
Overheating 257 357
Other Concern: Pressure Reference Chart    
    401A, 401B
Other Concern: Clutch and Band Application Chart   601

(1) Perform electrical routine first.