The Transmission Functional test should be the starting point of any mechanical/hydraulic transmission diagnosis. This table assumes that there are no DTCs set. Problems with the electronic transmission control system should be corrected before performing any of the diagnostic procedures in the Mechanical/Hydraulic Systems.
Step | Action | Value(s) | Yes | No | ||||
|---|---|---|---|---|---|---|---|---|
1 | Was the Powertrain or Transmission On-Board Diagnostic (OBD) System Check performed? | -- | ||||||
2 | Perform the Transmission Fluid Checking Procedure. Is the action complete? | -- | -- | |||||
3 | Perform the following procedures:
Is a harsh/soft shift condition present? | -- | ||||||
4 | Is there a poor transmission performance present? | |||||||
5 | Is there a poor TCC performance present? | -- | ||||||
6 | Is there a delayed or no engagement into drive or reverse present? | -- | ||||||
7 | Is a vibration or noise present? | -- | ||||||
8 | Is the fluid leaking? | -- | ||||||
9 | Are there any other transmission conditions present? | -- | System OK | |||||
10 | Perform the Line Pressure Check . Was a problem found and corrected? | -- | Verify repair | |||||
11 | Refer to the Torque Converter Clutch (TCC) Diagnosis . Was a problem found and corrected? | -- | Verify repair | |||||
12 | Perform the transmission Line Pressure Check . Was a problem found and corrected? | -- | Verify repair | |||||
13 | Refer to the Torque Converter Clutch (TCC) Diagnosis . Was a problem found and corrected? | -- | Verify repair | |||||
14 | Refer to the Fluid Leak Diagnosis and Repair Procedure . Is repair complete? | -- | Verify repair | -- | ||||
15 | Refer to the Symptoms and make repairs as directed. Is the action complete? | -- | Verify repair | -- |
