Frequently Asked Questions
Question
Accelerator Sensor - Magneti Marelli 6lpb fuel injection
Answer
Sensor incorporated in the accelerator pedal (1261)
Role of the sensor :
To register the driver demand (acceleration, decelaration)
To deliver the information to the injection ECU
Role of the injection ECU according to the data received :
To determine the opening of the motorised butterfly
To determine the injection time
To determine the ignition advance
Description
The accelerator pedal sensor provides 2 signals (voltage) .
The voltage value of one signal is equivalent to half of the other one .
Items of information from the connector channels are constantly compared with each other to detect a possible fault .
N.B. : The accelerator pedal sensor does not have a contact .
Electrical features
Allocation of the connector channels :
Channel 1 : Output signal 1
Channel 2 : Earth
Channel 3 : Output signal 2
Channel 4 : 5 Volts
The accelerator pedal has a point of resistance switch on vehicles fitted with a speed limiter .
" a " 4 -way connector .
(2) "point of resistance" switch .
" b " 2 -way connector .
Allocation of the connector channels : "point of resistance" switch :
Channel 1 : Accelerator pedal point of resistance signal
Channel 2 : Earth
Accelerator pedal released :
Voltage between earth and channel 1 : 0,3 to 0,6 volt
Voltage between earth and channel 3 : 0,15 to 0,3 volt
Accelerator pedal pressed fully down :
Voltage between earth and channel 1 : 3,5 to 4 volts
Voltage between earth and channel 3 : 1,75 to 2 volts
Details
Info 22 September 2009 by Dave_Retired.
C4 - DS4 Owners
Question
Accelerator Sensor - Magneti Marelli 6lpb fuel injection
Answer
Sensor incorporated in the accelerator pedal (1261)
Role of the sensor :
To register the driver demand (acceleration, decelaration)
To deliver the information to the injection ECU
Role of the injection ECU according to the data received :
To determine the opening of the motorised butterfly
To determine the injection time
To determine the ignition advance
Description
The accelerator pedal sensor provides 2 signals (voltage) .
The voltage value of one signal is equivalent to half of the other one .
Items of information from the connector channels are constantly compared with each other to detect a possible fault .
N.B. : The accelerator pedal sensor does not have a contact .
Electrical features
Allocation of the connector channels :
Channel 1 : Output signal 1
Channel 2 : Earth
Channel 3 : Output signal 2
Channel 4 : 5 Volts
The accelerator pedal has a point of resistance switch on vehicles fitted with a speed limiter .
" a " 4 -way connector .
(2) "point of resistance" switch .
" b " 2 -way connector .
Allocation of the connector channels : "point of resistance" switch :
Channel 1 : Accelerator pedal point of resistance signal
Channel 2 : Earth
Accelerator pedal released :
Voltage between earth and channel 1 : 0,3 to 0,6 volt
Voltage between earth and channel 3 : 0,15 to 0,3 volt
Accelerator pedal pressed fully down :
Voltage between earth and channel 1 : 3,5 to 4 volts
Voltage between earth and channel 3 : 1,75 to 2 volts
Details
Info 22 September 2009 by Dave_Retired.
C4 - DS4 Owners