General Information

Automatic Transaxle
P0727 Engine Speed Input Circuit No Signal - General Information

Component Location





General Description

Several control units are applied to electronically controlled vehicles. These units perform each control with informations from various sensors. Thus, sharing signal information from sensors is needed, so CAN communication type whose communication speed is high and insensitive to electrical noise by spark generation is adopted to controlling power-train (engine, automatic transaxle, ABS, TCS, ECS)
A/T, ESP, ABS control units share the informations that Engine rpm, APS signal, gear position, Torque reduction signal, using CAN communication to confirm active controlling.

DTC Description

TCM set this code If detected error in Engine rpm signal. (MIL ON : 2 driving Cycle)

DTC Detecting Condition





CAUTION :
1. The function with the higher priority will always take precedence. However, a low-priority is not overruled by a higher priority function.
2. Functions from different priority categories can also run in parallel. It is important to note which function will take precedence in this case.
3. 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.
4. The mechanical emergency run function must always have the highest priority, since from the electrical standpoint it is the only safe condition.

Diagnostic Circuit Diagram










Signal Waveform & Data




Fig 1) Engine rpm When Idle