The Signal Sequences Of An Acceleration Pedal Sensor - Bosch MS 6 Manual

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The system must have emergency switch, whose activation at least cuts the
throttle valve actuator from the power supply. Use and construction dependent
the safety functions, fault detections and fault responses of the ETC system can
differ in several points from ETC systems used in series production. Hence before
each vehicle‐commissioning the system must be checked for accuracy and fault‐
lessness.
The functionality of the ETC diagnosis and the fault responses are described in
the technical documents, handed over to the customer together with the system.
Each driver must be briefed regarding the system description. Further informa‐
tion you will find in document "SICHERHEITSHINWEISE‐Systemanforderungen
zum Betrieb eines Bosch Engineering GmbH EGas‐Systems" or can be enquired
at Bosch Motorsport.
The customer is responsible to have all ETC‐relevant diagnosis activated and for
their correct parameterization. By disregarding this information the functionality
of the electronic control unit and the safety cannot be ensured.
Notice: For detailed information see function description ETC
The usual route of ETC determines the drivers input measuring the pedal position
and transferring this leading signal via functionality options into the control of an
electrical throttle actuator. Pedal‐ and actuator positions are generally measured
in a secondary redundant way to verify the reliability of the function. To activate
the system, verify first the signal tolerances and error messages by moving man‐
ually acceleration pedal and throttle actuator. An inactive system is usually the
result of inverted wired sensor signals or actuator controls. Calibrate the pedal‐
and throttle positions.
Verification of acceleration pedal signals. The mathematic value of voltage pedal
signal 1 – 2*voltage pedal signal 2 has to be below 0.5 V or below value of
"UAPSCM_MAX"

The signal sequences of an acceleration pedal sensor:

uaps_a
uaps_b
aps
ECU MS 6
Voltage APS potentiometer a
Voltage APS potentiometer b
Acceleration pedal position
Bosch Motorsport