Technical Newsletter - Pedal Position Sensors

CONCEPT:
Drive by Wire, also known as Electronic
Throttle, was first used in Formula One SENSORS INJECTION SYSTEM DEVICES
by the McLaren team. This system uses Lambda Sensor Idle Air Control

an electronic complex (pedal position

sensor, motorized throttle body and
Temperature Sensor
Pedal Position Sensor
KS Sensor
ECU Anomaly
Indicator
Injection Nozzles
the ECU) to accelerate the engine, thus ELECTRONIC CONTROL
Fuel Pump
MAP Sensor UNIT
eliminating the old and problematic Solenoid Valve
CKP Sensor
throttle cable. Such system ensures
Scanner
comfort to the driver, with a smooth
drive, providing fuel economy and
lower pollutant emissions.
PRINCIPLE:
The accelerator pedal position sensor includes two potentiometers, the main potentiometer, and the safety potentiometer, integrated
in the same space. Both are supplied with 5 V on an independent basis. The output voltage of the first potentiometer ranges from 0
to 5 V, depending on the position of the accelerator pedal. On the other hand, the instantaneous value of the output voltage of the
second potentiometer is equal to half the output voltage of the first potentiometer. This redundancy increases the level of reliability of the
information sent by the sensor. When the pedal is pressed, the electrical signal of the sensor is used by the ECU, which, on its turn, identifies
the position of the pedal. With data sent by the other sensors (sensor of water temperature of the engine, MAP sensor…), the ECU makes
some corrections and manages the demand for torque through the throttle plate, so it has an exact opening.
The throttle plate is controlled by an electric motor that can reach its total opening, obtaining total acceleration and a perfect idle.
Manufactured with magnetic technology, the DS Acceleration Pedal Position Sensor avoids corrosion problems related to humidity, wear,
and poor contact, and it also ensures greater accuracy and durability.
LOCATION:

ACCELERATOR PEDAL POSITION SENSOR

The sensor may be fixed to a device that connects the throttle cable to the electric wiring harness or the pedal, as shown in the images below:

1 2

1. 2201 Sensor (Renault) 2. Acceleration pedal

connected to the with embedded
throttle cable. potentiometer (no
cables).

PROCEDURE FOR INSTALLATION OF THE CARD:

1 3
Remove the set screws Remove the
from the lid very carefully damaged card;
in order to avoid damage
to the contact pads that
connect with the card;

2 4 Place DS card according

Remove the lid very carefully,
to the direction of the
keeping the knuckle contact;
contact pads, always
holding it by the sides.
WARNING: Avoid contact with the
If they are damaged,we signal traces and con-
recommend the
replacement of the whole ducting wires as much
pedal. as possible;

5
Place the lid in the center
of the oblong space and
tighten the screws;

OBLONG
SPACE FOR DISPLACEMENT
AND ADJUSTMENT OF THE LID

Reinstall the pedal in the vehicle.

PRESERVED DAMAGED
 Technical Newsletter - Pedal Position Sensors

HOW DO YOU TEST THE ACCELERATOR PEDAL POSITION SENSOR OF A FOX 1.0 (DS2202):

PEDAL PINS FUNCTION

1 Supply of the 2nd potentiometer
2 Supply of the 1st potentiometer
3 Grounding of the 1st potentiometer
4 Sign of the 1st potentiometer
5 Grounding of the 2nd potentiometer
PEDAL POSITION SENSOR OF A FOX 1.0
6 Sign of the 2nd potentiometer

1 - Check the sensor supply:

Turn on the ignition without starting the engine; The voltage obtained should be around 5 V ±0.1;
Adjust the multimeter to the VDC scale (DC voltage); Insert the test leads into pins 2 and 3 to check the supply of the 1st
Insert the test leads into pins 1 and 5 to check the supply of potentiometer;
the 2nd potentiometer; The voltage obtained should be around 5 V ±0.1.

2º Analyze the sensor signal:

ACCELERATOR PEDAL POSITION SENSOR

PERFECT CONDITION
Place the cap of the pedal in the center of the oblong space. (Ideal position for adjustment).
1 Still with the multimeter at the VDC scale (DC voltage) and the ignition on, check the
sensor signal as follows:
PINS PEDAL AT REST
3 and 4 0,70V to 0,80V
5 and 6 0,35V to 0,40V

Note: In this condition, we have the perfect idle speed at 900 rpm with a good
pedal response time

ACCEPTABLE CONDITION
2 If the cap is in the total clockwise position, it will show the following:
PINS PEDAL AT REST
3 and 4 0,50V
5 and 6 0,25V

Note: In this condition, we have the perfect idle at 900 rpm, but the pedal
response time will be longer.

IRREGULAR CONDITION

3
If the cap is in a total counterclockwise position, it will show the following:
PINS PEDAL AT REST
3 and 4 0,90V
5 and 6 0,45V

Note: In this condition, we have a high idle at 1,500 rpm as, in pins 3 and 4; the
limit for adjustment is 0.85V. If it is higher than that, there will be an error
when we increase the idle.
 Technical Newsletter - Pedal Position Sensors

PROCEDURE FOR INSTALLATION OF THE DS 2201 – RENAULT CLIO 1.6 16V 2006:

Step 1: Disconnect and remove the battery; Step 3: You may verify the device now. Pull it up and remove the
Step 2: Disconnect the ECU wiring harness and remove it with the support; bad sensor;

Step 4: For required adjustments, you will need to place the battery back and Step 7: Adjust the multimeter at the continuous voltage scale
connect it. At this moment, you do not need to fix it in the correct position; (20 V) and check pins 2 and 6. The voltage obtained should be
Step 5: Remove the ECU from the support and connect the harness; 0.35 (± 0.05 volts). If not, spin the part in the device until you
get the correct reading;

ACCELERATOR PEDAL POSITION SENSOR

Step 6: Install the DS 2201 in the center of the oblong space. Tighten
it slightly, only to fit the part so that it spins in the device. Connect
the harness;

Step 8: Keep the part position and check pins 2 and 5. The voltage Step 9: With the part correctly positioned, tighten the screws
obtained should be 0.70 (± 0.05 volts), in other words, it should very well.;
double pin 6; Step 10: Place the sensor device correctly and temporarily fix
it with one screw, so that the device does not move in the next
step;

Step 11: Start the engine and check the throttle response. If you can, check it with the scanner;

WARNING:
If the throttle cable is stretched (out of position), throttle will not work.

Step 12: If the throttle response is correct, stop the engine. Remove the ECU and the battery from
the temporary place and correctly assemble all items in their proper places

ADVANTAGES OF THE ELECTRONIC THROTTLE:

Better performance; WARNING:
Total control of the acceleration; Fix the screws tightly;
Great engine response; Evaluate the conservation state of the electric wiring
Better control of the idle; harness;
Soft acceleration; If possible, apply a seal paint on the screws;
Better resumption; A low battery results in a loss of synchronism
Saving of fuel. (pedal/ECU/throttle body).
 Technical Newsletter - Pedal Position Sensors

CONCEPT:
The pedal switch, used in older
vehicles, goes out and gives space to SENSORS INJECTION SYSTEM DEVICES
a resistive sensor with dual function – Lambda Sensor Idle Air Control
more appropriate to modern vehicles.
The position sensors of the DS
Pedal are electronic, providing
Temperature Sensor
Pedal Position Sensor
KS Sensor
ECU Anomaly
Indicator
Injection Nozzles
ELECTRONIC CONTROL
durability and more accurate and MAP Sensor UNIT
Fuel Pump
instantaneous information for the CKP Sensor Solenoid Valve
ECU (ELECTRONIC COMMAND Scanner
UNIT).

WORKING PRINCIPLE:
The Clutch Sensor sends the signal to the ECU, which upon receiving this information cuts off the acceleration so that the
engine speed decreases and the driver is able to easily perform the gearshift of the vehicle.
This strategy reduces the emission of pollutants and, consequently, improves the fuel consumption.
The brake sensor sends the signal to the ECU, which, upon receiving this information, activates the brake lights.
This information is also used on vehicles equipped with autopilot. When the driver touches the brake, the sensor sends
the signal to the ECU. The unit then activates the brake lights and disables the autopilot.

CLUTH AND BRAKE PEDAL POSITION SENSOR

LOCATION:
Attached to the bracket, pedals are interconnected by means of a pedal pin engaged on the sensor guide.

HOW TO TEST THE CLUTCH SENSOR OF A MONTANA 1.4 VEHICLE (DS 2217):

Attention
DS Pedal Sensors are electronic, ie it has no resistive track. Hence, THE OHMIC
RESISTANCE IS NOT TESTED.

1º Step: Check sensor supply

• Turn on the ignition key;
• Set the multimeter on the Vdc (Continuous Voltage) scale;
• Insert the probes into terminals A (red tip) and C (black tip);
• The voltage checked should be around 5 volts.

2º Step: Analyze the pedal sensor signal

• Still with the Vdc (Continuous Voltage) scale and the ignition on, check the
voltage at terminals B and C;
• The read voltage should fit the range of the table below:

SITUATION PEDAL WITHOUT ACTIVATION (REST) FULLY ACTIVATED PEDAL

Screwed to the pedal 3,90 to 4,20 volts 0,50 to 1,10 volts
 Technical Newsletter - Pedal Position Sensors

INSTALLATION PROCEDURE:

Clutch Pedal Sensor Replacement Procedure:

1 - With the ignition off, remove the defective sensor from the pedal;

2 - Install the DS Pedal sensor and connect the sensor harness; CARE:
The cross reference (Original code x DS code) is the best
3 - Run the diagnostic scanner to eliminate all malfunctions; way to identify the model corresponding to the vehicle.
If the faults are not eliminated directly, the calibration procedure The pedal sensor may be damaged if mounted on a
must be carried out, as follows: pedal other than its application.
Some procedural errors lead the applicator to deception.
* Procedure performed on an Onyx 2014, Automatic, with the help Therefore, you should be aware of:
of a PDL 5500 Scanner. • Incorrect sensor attachment (sensor fork in relation to
the support pin);
1º Step: Connect the PDL 5500 scanner to the vehicle; • Electric harness with problem;
2º Step: Select the Scanner option; • The height of the brake and clutch pedals must always
3º Step: Select the vehicle manufacturer; be the same (aligned). Any deviation may have an effect
4º Step: Select the year of the vehicle; on the sensor malfunction.

CLUTH AND BRAKE PEDAL POSITION SENSOR

5º Step: Select the vehicle;
6º Step: Select the vehicle engine (the engine description can be The most common defects caused by failures in the
found easily in the vehicle document); Pedal Sensor circuit are:
7º Step: Confirm the data; • Injection light on;
8º Step: Select the “Engine” option; • Difficulty in carrying out the gear engagement;
9º Step: Select the type of transmission of the vehicle; • High fuel consumption;
10º Step: Select the “Functional Tests” option; • Loss of activation of the rear brake lights;
11º Step: Select the “Output Control” position; • Loss of autopilot drive.
12º Step: Select the option to learn the clutch pedal sensor
/ learn the brake pedal.

4 - Start the engine and check the proper operation.