Toyota Camry (XV70): Vehicle Control History
VEHICLE CONTROL HISTORY
DESCRIPTION
- Vehicle Control History (RoB) is a function that captures and stores ECU data when triggered by specific vehicle behavior.
- If the customer states that the engine stalled or will not start, it may be possible to diagnose 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 (RoB) 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.
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PRECAUTIONS
- As Vehicle Control History (RoB) may be overwritten whenever the trigger conditions are met, make sure to save Vehicle Control History (RoB) before performing any inspections.
- As Vehicle Control History (RoB) may be stored when performing an Active Test, learning, etc., make sure to clear the Vehicle Control History (RoB) before returning the vehicle to the customer.
CHECK VEHICLE CONTROL HISTORY (RoB) (ELECTRIC PARKING BRAKE SYSTEM)
HINT:
Vehicle Control History (RoB) of the electric parking brake system can be confirmed using the same menu for the vehicle stability control system (w/ Electric Parking Brake System): Chassis / Brake/EPB / Utility / Vehicle Control History (RoB)
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READ NEXT:
REAR BRAKE PAD REPLACEMENT MODE REAR BRAKE PAD REPLACEMENT MODE
*1 Rear Disc Brake Piston
*2 Nut
*a The nut moves inward in pad replacement mode
HINT: When replac
DESCRIPTION The following DTCs are stored when a malfunction occurs in the skid control ECU (brake actuator assembly).
DTC No. Detection Item
DTC Detection Condition Trouble Area
M
DESCRIPTION When the electric parking brake switch is pulled, a lock request signal is sent from the skid control ECU (brake actuator assembly) to the parking brake actuator assembly. When the electri
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DESCRIPTION The 4WD ECU assembly determines that the vehicle is turning based on the signals sent from the steering sensor.
The steering sensor signal is sent to the 4WD ECU assembly via CAN communication.
DTC No. Detection Item
DTC Detection Condition Trouble Area
C1297 S
INSTALLATION PROCEDURE 1. INSTALL CHECK VALVE GROMMET
(a) Install a new check valve grommet to the brake booster assembly. 2. INSTALL VACUUM WARNING SWITCH ASSEMBLY
(a) Install the vacuum warning switch assembly to the brake booster assembly as shown in the illustration.
*a 30