DESCRIPTION
Vehicle Control History is a function that captures and stores ECU data when triggered by specific vehicle behavior.
It may be possible to determine the cause of the malfunction by checking the vehicle history information and freeze frame data.
The number of possible stored Freeze Frame Data sets, whether multi Freeze Frame Data is available, the number of freeze frame points, Freeze Frame Data items, the ECU internal range, etc., is different depending on the stored group.
The stored data items for Vehicle Control History Freeze Frame Data are different depending on the stored group. When the value of a data item does not change across all points, only the value of the detection point will be displayed. The contents of the Freeze Frame Data is almost the same as that of the Data List.
PRECAUTIONS
As Vehicle Control History may be overwritten whenever the trigger conditions are met, make sure to save Vehicle Control History before performing any inspections.
As Vehicle Control History may be stored when performing an Active Test, learning, etc., make sure to clear the Vehicle Control History before returning the vehicle to the customer.
CHECK VEHICLE CONTROL HISTORY (POWER STEERING SYSTEM)
Turn the ignition switch off.
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Chassis / PPS / Utility / Vehicle Control History (RoB).
| Tester Display |
|---|
| Vehicle Control History (RoB) |
| FFD Group | Code | Tester Display | Measurement Item | Diagnostic Note |
|---|---|---|---|---|
| - | X2001 | Steering Angle Sensor Malfunction | Power steering ECU received the steering angle malfunction signal or steering sensor zero point memory malfunction signal. | - |
| - | X200C | Vehicle Speed Signal Invalidity | Power steering ECU received the vehicle speed malfunction signal. | - |
| - | X200D | NE Signal Malfunction | Power steering ECU received the engine speed malfunction signal. | - |
CLEAR VEHICLE CONTROL HISTORY (POWER STEERING SYSTEM)
Turn the ignition switch off.
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Chassis / PPS / Utility / Vehicle Control History (RoB).
| Tester Display |
|---|
| Vehicle Control History (RoB) |
Press the DTC clear button.
By performing this procedure, all stored Vehicle Control History items will be cleared.