For 1990-2009 cars

Important: Use the symptom tables only if the following conditions are met:

• | Refer to Diagnostic Starting Point - Vehicle .

• | There are no DTCs set.

• | The control modules can communicate via the serial data link.

• | Review the system operation in order to familiarize yourself with the system functions. Refer to Transmission General Description and Transmission Component and System Description .

### Visual/Physical Inspection

Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

### Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

### Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

• | Fluid Diagnosis

- | Transmission Fluid Check

- | Fluid Pressure High or Low

- | Automatic Transmission Fluid Leaks

- | Fluid Leak Diagnosis

• | Noise and Vibration Diagnosis

- | Whine/Growl Noise

- | Noise and Vibration Analysis

- | Torque Converter Diagnosis

• | Range Performance Diagnosis

- | No Park

- | No Drive in All Ranges

- | No Reverse Gear

• | Shift Quality Feel Diagnosis

- | Harsh Garage Shift

- | Harsh or Late First, Second, Third, and Fourth Shift

- | Harsh First and Reverse Shift

- | Harsh or Late Second and Sixth Shift

- | Harsh or Late Third, Fifth, and Reverse Shift

- | Harsh Fourth, Fifth, and Sixth Shift

• | Shift Pattern

- | No First and Reverse Gears

- | No First, Second, Third, and Fourth Gear

- | No Second and Sixth Gear

- | No Fourth, Fifth, and Sixth Gear

- | No Third, Fifth, and Reverse Gear

• | Torque Converter Diagnosis

- | Torque Converter Diagnosis

- | No Torque Converter Clutch Apply

- | No Torque Converter Clutch Release

• | Symptom Not Found or No Symptom Detected

- | Transmission Fluid Check

- | Road Test

- | Line Pressure Check