The input(turbine) speed sensor outputs pulse-signals according to the revolutions of the input shaft of the transmission. The TCM determines the input shaft speed by counting the frequency of the pulses. This value is mainly used to control the optimum fluid pressure during shifting.
TCM set this code If output value is out of available range (MIL ON : 2 driving Cycle)
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Check signal range |
•
Faulty in Mechatronics (Valve-body + TCM) |
Enable Conditions |
•
Sensor supply power : normal
•
Engine rpm > 600RPM
•
Engine speed : normal status
•
Output speed > 500RPM
•
Output speed : notmal status | |
Threshold Value |
•
20RPM ≥ Input speed sensor ≥ 8000RPM | |
Diagnostic Time |
•
0.6 second | |
Fail Safe |
•
Keep the persent gear status
•
Fixed at 3rd gear
•
Maximum line pressure control(D : 14kg/㎠, R : 20kg/㎠)
•
Torque convertor clutch : OFF
•
No learning control (priority : 3) |
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.
Fig 1) Input speed sensor
