RM35X0E _51 Engine / Hybrid System _078720 7GR-FKS ENGINE CONTROL _0381907 SFI SYSTEM J

7GR-FKS ENGINE CONTROL  SFI SYSTEM  Brake Override System  


DESCRIPTION

When the vehicle is being driven, depressing the accelerator pedal sensor assembly and brake pedal will activate the brake override system to restrict engine output. The conditions for activating the brake override system as well as the items that are controlled are explained below.

A300224E79
5.708,1.031 6.583,1.5 0.875,0.469 10 false Meter Display Request 5.677,3.073 6.948,3.927 1.271,0.854 10 false Engine Output Request 2.885,3.781 3.917,4 1.031,0.219 10 false Vehicle Speed 3.094,2.76 3.823,3 0.729,0.24 10 false ON/OFF 2.813,1.75 3.802,2.125 0.99,0.375 10 false Master Cylinder Pressure* 2.656,0.781 3.948,1.26 1.292,0.479 10 false Actual Accelerator Pedal Opening Value 0.396,3.344 2.354,3.698 1.958,0.354 10 false Vehicle Speed Sensor or Wheel Speed Sensor 0.385,2.573 2.188,2.781 1.802,0.208 10 false Stop Light Switch Assembly 0.385,1.354 2.458,1.719 2.073,0.365 10 false Master Cylinder Pressure Sensor (Brake Actuator Assembly) 0.396,0.552 2.844,0.865 2.448,0.313 10 false Accelerator Pedal Position Sensor 0.083,0.083 3.083,0.25 3,0.167 10 false Brake Override System: 4.344,4.188 4.75,4.385 0.406,0.198 10 false ECM 5.698,4.479 7.063,4.74 1.365,0.26 10 false *: w/ VSC system

Activation Conditions:
·

When the accelerator pedal and brake pedal are depressed.

NOTICE:

The vehicle may not enter the brake override system control due to the relation of the accelerator pedal angle and the vehicle's speed.




Items Controlled:
·

When the vehicle speed is extremely low, the accelerator opening value used when controlling the engine is reduced more than normal.

HINT:

During control, the Accelerator Position value in the Data List will be lower than normal.


·

When the vehicle speed is not extremely low, the accelerator opening value is forcibly lowered to a fixed value.

HINT:
·

During control, the Accelerator Position value in the Data List is forcibly reduced to a specified value regardless of the actual accelerator opening value (Accelerator Position Sensor No.1 Voltage %).

·

During brake override system control, the operation indicator is displayed on the meter.





Deactivation Conditions:
·

When the brake pedal or the accelerator pedal returns to some degree.



CAUTION / NOTICE / HINT

Inspection Method

Example:

Drive at 10 km/h (6.25 mph), depress the accelerator pedal by 1/2 to 3/4 and keep it in that position. Under these conditions, if the engine speed decreases to 1000 rpm when the brake pedal is depressed, then the brake override system has been activated.


CAUTION:

When carrying out the inspection, use a place where you are able to carry it out safely and also pay close attention to your surroundings.

Also, when driving make absolutely sure that all road traffic laws, such as speed limits, are observed.


HINT:
·

Under normal conditions, the Accelerator Position value changes in response to the Accelerator Position Sensor No.1 Voltage % value. For more information on the numerical values, refer to the Data List.

Click hereEngine / Hybrid System>7GR-FKS (ENGINE CONTROL)>SFI SYSTEM>DATA LIST / ACTIVE TEST

·

If the Accelerator Position and Accelerator Position Sensor No.1 Voltage % values in the Data List diverge and the Accelerator Position value in the Data List is fixed even though Accelerator Position Sensor No.1 Voltage % is changing, check that this control is activated (use the GTS data saving function to record data while driving the vehicle and then confirm it after driving is completed).



NOTICE:

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

Example: While operating the accelerator pedal, the customer uses their left foot to operate the brake pedal.


PROCEDURE

1.CHECK DTC OUTPUT
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: System Select / Health Check.


e.

Check the DTCs.


Result:
Result Proceed to
DTCs are not output (w/ VSC system) A
DTCs are not output (w/o VSC system) B
DTCs are output C



A

2.READ VALUE USING GTS (MASTER CYLINDER SENSOR 1)

B

3.READ VALUE USING GTS (STOP LIGHT SW)

C

GO TO DTC CHART

2.READ VALUE USING GTS (MASTER CYLINDER SENSOR 1)
a.

Connect the GTS to the DLC3.


b.

Start the engine.


c.

Turn the GTS on.


d.

Enter the following menus: Chassis / Brake / Data List / Master Cylinder Sensor 1.

Chassis > Brake > Data List
Tester Display
Master Cylinder Sensor 1
50003 435 21

e.

Read the value displayed on the GTS.

Standard:

-1.00 to 0.00 MPa (Brake pedal released)



f.

Check that the brake fluid pressure value of the "Master Cylinder Sensor 1" observed on the GTS changes when the brake pedal is depressed.

OK:

When the pedal is depressed, the pressure displayed on the GTS increases.



Result:
Proceed to
OK
NG



OK

3.READ VALUE USING GTS (STOP LIGHT SW)

NG

CHECK BRAKE ACTUATOR ASSEMBLY

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/ VSC OFF Switch)>HOW TO PROCEED WITH TROUBLESHOOTING


3.READ VALUE USING GTS (STOP LIGHT SW)
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Powertrain / Engine / Data List / Stop Light SW.

Powertrain > Engine > Data List
Tester Display
Stop Light SW
50003 372 12

e.

Check the Data List indication when the brake pedal is depressed and released.

OK:
GTS Display Condition Specified Condition
Stop Light SW Brake pedal released OFF
Brake pedal depressed ON



Result:
Proceed to
OK
NG



OK

4.INSPECT BRAKE PEDAL SUPPORT ASSEMBLY

NG

INSPECT STOP LIGHT SWITCH ASSEMBLY
·

for LED Type: Click hereVehicle Exterior>LIGHTING (EXT)>STOP LIGHT SWITCH>ON-VEHICLE INSPECTION

·

for Bulb Type: Click hereVehicle Exterior>LIGHTING (EXT)>STOP LIGHT SWITCH>INSPECTION



4.INSPECT BRAKE PEDAL SUPPORT ASSEMBLY
a.

Inspect and adjust the brake pedal support assembly.

for LHD: Click hereBrake>BRAKE SYSTEM (OTHER)>BRAKE PEDAL (for LHD)>ADJUSTMENT

for RHD: Click hereBrake>BRAKE SYSTEM (OTHER)>BRAKE PEDAL (for RHD)>ADJUSTMENT

HINT:

If the stop light switch turns ON too late, the start of brake override system control may be delayed; if it turns ON too soon, brake override system control may begin too early, so conduct inspection of the brake pedal support assembly and stop light switch assembly.



Result:
Proceed to
OK
NG



OK

5.READ VALUE USING GTS (ACCELERATOR PEDAL POSITION SENSOR)

NG

REPAIR OR REPLACE BRAKE PEDAL SUPPORT ASSEMBLY

for LHD: Click hereBrake>BRAKE SYSTEM (OTHER)>BRAKE PEDAL (for LHD)>REMOVAL

for RHD: Click hereBrake>BRAKE SYSTEM (OTHER)>BRAKE PEDAL (for RHD)>REMOVAL


5.READ VALUE USING GTS (ACCELERATOR PEDAL POSITION SENSOR)
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Enter the following menus: Powertrain / Engine / Data List / Accelerator Position Sensor No.1 Voltage % and Accelerator Position Sensor No.2 Voltage %.

Powertrain > Engine > Data List
Tester Display
Accelerator Position Sensor No.1 Voltage %
Accelerator Position Sensor No.2 Voltage %
50003 372 256,257

e.

Read the value displayed on the GTS.

OK:
GTS Display Condition Specified Condition
Accelerator Position Sensor No.1 Voltage % Accelerator Pedal Released → Depressed → Released Values smoothly change following accelerator pedal operation
Accelerator Position Sensor No.2 Voltage %


HINT:

For numerical values of Accelerator Position Sensor No.1 Voltage % and Accelerator Position Sensor No.2 Voltage %, refer to the Data List.

Click hereEngine / Hybrid System>7GR-FKS (ENGINE CONTROL)>SFI SYSTEM>DATA LIST / ACTIVE TEST



Result:
Proceed to
OK
NG



OK

6.READ VALUE USING GTS (VEHICLE SPEED)

NG

REPLACE ACCELERATOR PEDAL(W/SENSOR) ROD ASSEMBLY

Click hereEngine / Hybrid System>7GR-FKS (ENGINE CONTROL)>ACCELERATOR PEDAL>REMOVAL


6.READ VALUE USING GTS (VEHICLE SPEED)
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Start the engine.


e.

Enter the following menus: Powertrain / Engine / Data List / Vehicle Speed.

Powertrain > Engine > Data List
Tester Display
Vehicle Speed
50003 372 212

f.

Read the value displayed on the GTS.

Standard:
GTS Display Condition Specified Condition
Vehicle Speed Vehicle stopped, engine running 0 km/h (0 mph)
Vehicle being driven at constant speed between 16.1 to 64.4 km/h (10 to 40 mph) No large fluctuations when driving at a constant speed


CAUTION:

When performing a drive test, obey all speed limits and traffic laws.


HINT:

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



Result:
Proceed to
OK
NG



OK

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

NG

GO TO METER / GAUGE SYSTEM (SPEED SIGNAL CIRCUIT)

Click hereVehicle Interior>METER / GAUGE / DISPLAY>METER / GAUGE SYSTEM>Speed Signal Circuit


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

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Start the engine.


e.

Enter the following menus: Chassis / Brake / Data List / FR Wheel Speed, FL Wheel Speed, RR Wheel Speed and RL Wheel Speed.

Chassis > Brake > Data List
Tester Display
FR Wheel Speed
FL Wheel Speed
RR Wheel Speed
RL Wheel Speed
50003 435 13,14,15,16

f.

Read the value displayed on the GTS.

Standard:
GTS Display Condition Specified Condition
FR Wheel Speed
FL Wheel Speed
RR Wheel Speed
RL Wheel Speed 		Vehicle stopped, engine running 0 km/h (0 mph)
Vehicle being driven at constant speed between 16.1 to 64.4 km/h (10 to 40 mph) No large fluctuations when driving at a constant speed


CAUTION:

When performing a drive test, obey all speed limits and traffic laws.


HINT:

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



Result:
Proceed to
OK
NG



OK

END

NG

INSPECT FRONT OR REAR SPEED SENSOR