TCM is activated by power supply. Signals from several sensors, such as ATFS and APS, is inputted to TCM. Comparing inputted siganals with control LOGIC saved at micro controller and EEPROM, TCM controlls Transmission as actuating solenoids . To guarantee accurate control, TCM performs SELF TEST, DIAGNOSIS of several sensors and actuators. And if serious trouble which affects vehicle performance occurrs, TCM sets DTCs. At certain cases, TCM inhibites shifting in order to prevent dangerous situation due to incorrect control.
TCM set this code If the function of Fail-safe unstable status or detected solenoid operation in not controlling solenoid conditon.
(MIL ON : 2 driving Cycle)
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Check function |
•
Mechatronics(Valve-body + TCM) |
Enable Conditions |
•
"IG KEY" ON | |
Threshold Value |
•
Software malfunction | |
Diagnostic Time |
•
Immediately | |
Fail Safe |
•
High speed : fixed at 5th gear, low speed : fixed at 3rd gear
•
Reverse : Shift lock(Push "Unlock button → possible to shift) (priority :4) |
The function with the higher priority will aiways take precedence. However, a low-priority is not overruled by a higher priority function.
Functions from different priority categories can also run in parallel. It is important to note which function will take precedence in this case.
In such an event it is possible for a substitute function with low priority not be carried out if a second, higher-priority function is present. This has been taken into account when compiling the priority list and is international.
The mechanical emergency run function must always have the highest priority, since from the electrical standpoint it is the only safe condition.
