SAE J1843_202207

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.