HYBRID CONTROL SYSTEM Brake Override System

DTC Code	DTC Name
	Brake Override System

DESCRIPTION

When the vehicle is being driven with the accelerator pedal depressed, depressing the brake pedal without releasing the accelerator pedal will activate the brake override system to restrict driving torque. The conditions for activating the brake override system as well as the items that are controlled are explained below.

Activation Conditions:

The accelerator pedal and brake pedal are depressed at the same time.

Note:
Brake override control may not be performed depending on the relationship between accelerator opening and vehicle speed.

Items Controlled:

Controls driving force

Tip:
When the control is operating, requested accelerator torque is controlled in accordance with the brake pedal stroke.

Deactivation Conditions:

The accelerator pedal or brake pedal is released.

CAUTION / NOTICE / HINT

Inspection Method

Drive at 10 km/h (6 mph), depress the accelerator pedal by 1/2 to 3/4 and keep it in that position. Under these conditions, if driving torque is controlled when the brake pedal is depressed by the left foot of the driver, it can be confirmed that the brake override system has operated.

CAUTION:

Perform this road test only in an appropriate safe location, in accordance with all local laws.

Pay careful attention to the surroundings when performing the road test.

Tip:

The brake override system restricts driving torque if the brake pedal is depressed when driving with the accelerator pedal depressed. If a customer reports experiencing a loss of power (driving torque) after the accelerator and brake pedals have both been intentionally depressed, explain that this is not a malfunction, and depressing both the accelerator and brake pedals at the same time should be avoided.

PROCEDURE

CHECK DTC OUTPUT (HEALTH CHECK)

Connect the GTS to the DLC3.
Turn the power switch on (IG).
Enter the following menus: System Select / Health Check.

Check for DTCs.

Result


Proceed to
No DTCs are output.
DTCs are output.

Turn the power switch off.

DTCs are output.

GO TO DTC CHART

No DTCs are output.

READ VALUE USING GTS (MASTER CYLINDER CTRL TRQ)

Connect the GTS to the DLC3.
Turn the power switch on (IG).

Enter the following menus: Powertrain / Hybrid Control / Data List / Master Cylinder Ctrl Trq.

Powertrain > Hybrid Control > Data List


Tester Display
Master Cylinder Ctrl Trq

Powertrain > Hybrid Control > Data List


Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Master Cylinder Ctrl Trq	Braking torque equivalent to master cylinder brake fluid pressure total braking torque Master cylinder brake fluid pressure control torque = hydraulic brake control torque + rear regenerative brake torque*	-	Brake pedal depressed: Changes with the brake pedal pressure	Master cylinder pressure sensor

Result


Result	Proceed to
Display changes according to brake pedal depression force.	A
Display does not change according to brake pedal depression force.	B

Turn the power switch off.

CHECK BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY

Click here

READ VALUE USING GTS (ACCEL PEDAL POS #1, ACCEL PEDAL POS #2)

Connect the GTS to the DLC3.
Turn the power switch on (IG).

Enter the following menus: Powertrain / Hybrid Control / Data List / Accel Pedal Pos #1, Accel Pedal Pos #2.

Powertrain > Hybrid Control > Data List


Tester Display
Accel Pedal Pos #1
Accel Pedal Pos #2

Read the value of "Accel Pedal Pos #1" and "Accel Pedal Pos #2" displayed on the GTS.

Standard


Inspection Condition	Specified Condition
Accelerator pedal fully released → fully depressed	Value (%) changes with accelerator pedal operation

Tip:

Refer to the SFI system Data List for the "Accel Pedal Pos #1" and "Accel Pedal Pos #2" standard ranges when the accelerator pedal is operated.

w/ EGR System:Click here

w/o EGR System:Click here

w/ Canister Pump Module:Click here

Turn the power switch off.

Result


Proceed to
OK
NG

REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY

Click here

READ VALUE USING GTS (VEHICLE SPD)

Connect the GTS to the DLC3.
Turn the power switch on (IG).

Enter the following menus: Powertrain / Hybrid Control / Data List / Vehicle Spd.

Powertrain > Hybrid Control > Data List


Tester Display
Vehicle Spd

Read the value of "Vehicle Spd" displayed on the GTS.

Standard


Inspection Condition	Specified Condition
Vehicle stopped	0 km/h (0 mph)
Vehicle being driven at a constant speed (16 to 64 km/h (10 to 40 mph))	No large fluctuations in displayed speed

CAUTION:

Perform this road test only in an appropriate safe location, in accordance with all local laws.

Tip:

Data can be captured relatively easily by using the snapshot function in the Data List. Confirm the data after performing the drive test.

Turn the power switch off.

Result


Proceed to
OK
NG

GO TO METER / GAUGE SYSTEM

Click here

READ VALUE USING GTS (FR, FL, RR, RL WHEEL SPEED)

Connect the GTS to the DLC3.
Turn the power switch on (READY).

Enter the following menus: Chassis / ABS/VSC/TRC / Data List / All Data / FR Wheel Speed, FL Wheel Speed, RR Wheel Speed and RL Wheel Speed.

Chassis > ABS/VSC/TRC > Data List


Tester Display
FR Wheel Speed
FL Wheel Speed
RR Wheel Speed
RL Wheel Speed

Read the value of "FR Wheel Speed", "FL Wheel Speed", "RR Wheel Speed" and "RL Wheel Speed" displayed on the GTS.

Standard


Inspection Condition	Specified Condition
Vehicle stopped	0 km/h (0 mph)
Vehicle being driven at a constant speed (16 to 64 km/h (10 to 40 mph))	No large fluctuations in displayed speed

CAUTION:

Perform this road test only in an appropriate safe location, in accordance with all local laws.

Tip:

Data can be captured relatively easily by using the snapshot function in the Data List. Confirm the data after performing the drive test.

Turn the power switch off.

Result


Proceed to
OK
NG

END

INSPECT SPEED SENSOR (FRONT OR REAR SPEED SENSOR)

Click here