DTC P0731-00; 1GR Incorrect Ratio: Notes
DETECTION CONDITION & POSSIBLE CAUSE
| DTC P0731:00 |
1GR incorrect ratio |
| DETECTION CONDITION |
- In D position, 1GR, the following phenomenon occurs:
- Speed ratio is 0.75 to 1.2 for 2, 000 ms while vehicle is stopped in D position.
- There is difference between turbine/input shaft speed and output shaft speed sensor speed for 230 to 1, 980 ms (varies with ATF temperature and ECT) during shift-up.
- There is difference between turbine/input shaft speed and output shaft speed sensor speed for 1, 500 to 3, 900 ms (varies with ATF temperature) while driving without shifting.
|
| FAIL-SAFE FUNCTION |
- Inhibits malfunctioning gear.
- Limits engine torque.
- Inhibits learning control.
- Inhibits manual mode.
- Inhibits neutral idle control.
- Inhibits AAS.
|
| POSSIBLE CAUSE |
- ATF is less than specified value
- Clutch burnt
- Shift solenoid malfunction
- ATF leakage from clutch circuit
- Control valve body malfunction
|
| SYSTEM WIRING DIAGRAM |
Not applicable |