A/T Diagnosis General Description
TCM has an On-Board Diagnosis System which detects a malfunction in this system.
When diagnosing a trouble in transmission including this system, be sure to have full understanding of the outline of On-Board Diagnostic System Description and each item in Precautions in Diagnosing Trouble and execute diagnosis according to A/T System Check given below to obtain correct result smoothly.
There are two type of On-Board Diagnostic System, M13 engine model with VVT and M13 engine model without VVT, depending on vehicle specifications. Identify the type of system for vehicle being serviced by whether the engine equipped with VVT or not.