Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - 3UR-FE ENGINE CONTROL
READ VALUE USING INTELLIGENT TESTER (MASTER CYLINDER SENSOR)
READ VALUE USING INTELLIGENT TESTER (STOP LIGHT SWITCH AND ST1)
READ VALUE USING INTELLIGENT TESTER (ACCELERATOR PEDAL POSITION SENSOR)
READ VALUE USING INTELLIGENT TESTER (VEHICLE SPEED)
READ VALUE USING INTELLIGENT TESTER (FR, FL, RR, RL WHEEL SPEED)
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 driving torque. The conditions for activating the brake override system as well as the items that are controlled are explained below.
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.
- HINT:
- During control, the Accelerator Position value in the Data List becomes smaller.
- 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 (Accel Sens. No. 1 Volt%).
INSPECTION PROCEDURE
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 traffic laws, such as speed limits, are observed.
- HINT:
- NOTICE:
- 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 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.
1.CHECK DTC OUTPUT |
Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG) and turn the tester on.
Enter the following menus: Utility / All Codes.
Check DTCs.
Result | Proceed to |
No DTC output | A |
DTC output | B |
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A | |
2.READ VALUE USING INTELLIGENT TESTER (MASTER CYLINDER SENSOR) |
Connect the intelligent tester to the DLC3.
Turn the ignition switch to ON and turn the intelligent tester on.
Start the engine.
Enter the following menus: Chassis / ABS/VSC/TRC / Data List / Master Cylinder Sensor.
Read the value displayed on the intelligent tester.
Intelligent tester Display | Measurement Item/Range | Normal Condition |
Master Cylinder Sensor | Master cylinder pressure sensor reading/ Min.: 0.00 V, Max.: 5.00 V | Brake pedal released: 0.30 to 0.90 V Reading increases when brake pedal is depressed |
Check that the brake fluid pressure value of the "Master Cylinder Sensor" observed on the intelligent tester changes when the brake pedal is depressed.
- OK:
- When the pedal is depressed, the voltage displayed on the intelligent tester increases.
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OK | |
3.READ VALUE USING INTELLIGENT TESTER (STOP LIGHT SWITCH AND ST1) |
Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG) and turn the tester on.
Enter the following menus: Powertrain / Engine / Data List / Stop Light Switch and ST1.
Check the Data List indication when the brake pedal is depressed and released.
- OK:
intelligent tester Display Condition Specified Condition Stop Light Switch Brake pedal released OFF Brake pedal depressed ON ST1 Brake pedal released OFF Brake pedal depressed ON
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OK | |
4.INSPECT BRAKE PEDAL |
Inspect and adjust the brake pedal ().
- 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 and stop light switch assembly.
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OK | |
5.READ VALUE USING INTELLIGENT TESTER (ACCELERATOR PEDAL POSITION SENSOR) |
Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG) and turn the tester on.
Enter the following menus: Powertrain / Engine / Data List / Accel Sens. No. 1 Volt % and Accel Sens. No. 2 Volt %.
Read the value displayed on the intelligent tester.
- OK:
intelligent tester Display Condition Specified Condition Accel Sens. No. 1 Volt % Accelerator Pedal
Released → Depressed → ReleasedValues smoothly change following accelerator pedal operation Accel Sens. No. 2 Volt %
- HINT:
- For numerical values of Accel Sens. No. 1 Volt % and Accel Sens. No. 2 Volt %, refer to the Data List ().
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OK | |
6.READ VALUE USING INTELLIGENT TESTER (VEHICLE SPEED) |
Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG) and turn the tester on.
Start the engine.
Enter the following menus: Powertrain / Engine / Data List / Vehicle Speed.
Read the value displayed on the intelligent tester.
- Standard:
intelligent tester Display Condition Specified Condition Vehicle Speed Vehicle stopped, engine running 0 km/h (0 mph) Vehicle running 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 the confirmation driving pattern, 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.
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OK | |
7.READ VALUE USING INTELLIGENT TESTER (FR, FL, RR, RL WHEEL SPEED) |
Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG) and turn the tester on.
Start the engine.
Enter the following menus: Chassis / ABS/VSC/TRAC / Data List / FR Wheel Speed, FL Wheel Speed, RR Wheel Speed and RL Wheel Speed.
Read the value displayed on the intelligent tester.
- Standard:
intelligent tester Display Condition Specified Condition FR Wheel Speed
FL Wheel Speed
RR Wheel Speed
RL Wheel SpeedVehicle stopped, engine running 0 km/h (0 mph) Vehicle running 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 the confirmation driving pattern, 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.
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OK | ||
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