Step | Action | Value(s) | Yes | No | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
The Functional Test Procedure is the first step in diagnosing mechanical or hydraulic transmission conditions. The Functional Test provides procedures and references to the Symptom Diagnosis table for specific diagnostic information. | ||||||||||||||||||||||||||||
1 |
Important: Engine performance can greatly affect transmission performance. Ensure that the complaint is not the result of poor engine performance before continuing. Verify the customer complaint. Has the customer complaint been verified? | -- | -- | |||||||||||||||||||||||||
2 |
Important: Many transmissions have default actions that take place once a DTC fault is detected. These actions may be interpreted as being a transmission concern. Has the Powertrain OBD System Check in Engine Controls been performed? | -- | ||||||||||||||||||||||||||
3 | Perform a visual inspection. Look for the following conditions:
Was an item identified that needs service? | -- | Go to the Appropriate Repair or Diagnosis Section | |||||||||||||||||||||||||
4 | Perform the Transmission Fluid Check . Is the procedure complete? | -- | Go to Transmission Fluid Check | |||||||||||||||||||||||||
5 | Perform the Road Test . Did the vehicle exhibit any objectionable condition? | -- | System OK | |||||||||||||||||||||||||
6 | Did the vehicle exhibit objectionable torque converter operation? | -- | ||||||||||||||||||||||||||
7 | Did the vehicle exhibit a noise condition? | -- | Go to Symptom Diagnosis | |||||||||||||||||||||||||
8 | Did the vehicle exhibit a vibration condition? | -- | ||||||||||||||||||||||||||
9 | Did the vibration occur only during TCC apply or release? | -- | Go to Symptom Diagnosis | |||||||||||||||||||||||||
10 | Did the vehicle exhibit a shift speed condition such as low or high shift speeds? | -- | Go to Symptom Diagnosis | |||||||||||||||||||||||||
11 | Did the vehicle exhibit any of the following shift quality (feel) conditions?
| -- | ||||||||||||||||||||||||||
12 | Perform the Line Pressure Check . Is the line pressure within specification? | -- | Go to Symptom Diagnosis | Go to Symptom Diagnosis | ||||||||||||||||||||||||
13 | Did the vehicle exhibit any of the following shift pattern conditions?
| -- | Go to Symptom Diagnosis | |||||||||||||||||||||||||
14 | Did the vehicle exhibit any of the following range performance conditions?
| -- | Go to Symptom Diagnosis | System OK | ||||||||||||||||||||||||
15 | Refer to Torque Converter Diagnosis . Refer to Flexplate/Torque Converter Vibration Test . Did the vehicle exhibit any of the following TCC conditions?
| -- | Go to Symptom Diagnosis | System OK | ||||||||||||||||||||||||
