Accelerator Pedal Position Sensor for Use with Electronic Controls in Medium- and Heavy-Duty Vehicle Applications—Truck and Bus
The purpose of this SAE Recommended Practice is to provide a common electrical and mechanical interface specification that can be used to design electronic accelerator pedal position sensors and electronic control systems for use in medium- and heavy-duty vehicle applications.
The following changes have been made to the document:
Foreword: Changed the intent of the document from minimizing the number of accelerator position sensors to guidance on the currently accepted signal types.
3.2, 3.3: Added definition of APS1 and APS2 for redundancy in the sensor signals.
3.13: Changed “Modulated” to “Modulation” for clarification.
Figure 1: Updated the graphic to make easier to read.
Figure 2: Updated the graphic to make it easier to read.
Figure 3: Updated the graphic to make it easier to read.
Section 6 and 6.1: Added “Dual” signals for redundant and independent electrical signals.
6.4: Updated the output range to account for dual signals.
6.5: Updated the diagnostic range per 6.4.
Figure 7: Updated the graphic for dual signals.
Figure 8: Updated the graphic to make easier to read.
6.12: Added “each” and “A short between redundant APS signals will result in a violation of correlation” to account for the dual signals.
Section 7 and 7.1: Added “dual” signals for redundant and independent signals.
7.2: Removed battery voltage supplies. It is recommended to operate the throttle signals off of a regulated supply.
7.3: 20 mA should be sufficient current to power the sensors.
7.4: Updated the output range to account for the dual signals.
7.5: Updated the fault range to account for dual signals.
7.8: Added clarification to tighter tolerance within a range of acceptable frequencies.
7.9: Added signal transition time. This value is dependent on the system setup and should be discussed and validated with the ECU supplier.
7.13: Added clarification for dual signals.
Figure 10: updated the graphic to make it easier to read.
Figure 11: updated the graphic to make it easier to read.
9.1: Added clarification that EMC should be considered in the design.
SAE J1843 has been reaffirmed to comply with the SAE Five-Year Review policy.
Safety regulations and standards
Transmission control units
Electronic control systems
Also known as: SAE J 1843
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