Symptoms - Automatic Transmission

Symptoms - Automatic Transmission

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

* Refer to Diagnostic Starting Point - Vehicle 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 Transmission General Description and Transmission Component and System Description 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 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 Level and Condition Check Transmission Fluid Level and Condition Check
- Main Fluid Pump Pressure High or Low Main Fluid Pump Pressure High or Low
- Auxiliary Fluid Pump Pressure High or Low Auxiliary Fluid Pump Pressure High or Low
- Automatic Transmission Fluid Leaks Automatic Transmission Fluid Leaks
- Fluid Leak Diagnosis Fluid Leak Diagnosis

* Transmission Temperature

- Automatic Transmission Overheating Automatic Transmission Overheating
- Transmission Hot - Idle Engine Transmission Hot - Idle Engine

* Noise and Vibration Diagnosis

- Whine/Growl Noise That Changes with Vehicle Speed Whine/Growl Noise That Changes with Vehicle Speed
- Noise in First or Reverse Gear Noise in First or Reverse Gear
- Noise in First, Second, Third, Fourth, or Reverse Gear Noise in First, Second, Third, Fourth, or Reverse Gear
- Noise in First, Second, or Reverse Gear Noise in First, Second, or Reverse Gear
- Noise in Fourth Gear Noise in Fourth Gear
- Vibration Vibration
- Noise and Vibration Analysis Noise and Vibration Analysis

* Range Performance Diagnosis

- No Park or Drive No Park or Drive
- No Drive in All Ranges No Drive in All Ranges
- No Reverse Gear No Reverse Gear
- No Drive or Reverse Gear No Drive or Reverse Gear

* Shift Quality Feel Diagnosis

- Harsh Garage Shift Harsh Garage Shift
- Harsh, Soft, Delayed or Slipping First or Reverse Gear Harsh, Soft, Delayed or Slipping First or Reverse Gear
- Harsh, Soft, Delayed or Slipping 1-2-3-4 Shift Harsh, Soft, Delayed or Slipping 1-2-3-4 Shift
- Harsh, Soft, Delayed, or Slipping Reverse Gear Harsh, Soft, Delayed, or Slipping Reverse Gear

* Shift Pattern

- No First Gear No First Gear
- No First and Reverse Gears No First and Reverse Gears
- No First, Second, Third, or Fourth Gear No First, Second, Third, or Fourth Gear
- No First, Second, or Reverse Gear No First, Second, or Reverse Gear
- Stuck in First or Reverse Gear Stuck in First or Reverse Gear

* Symptom Not Found or No Symptom Detected

- Transmission Fluid Level and Condition Check Transmission Fluid Level and Condition Check
- Road Test 2ML70 - Automatic Transmission
- Line Pressure Check Line Pressure Check