This Cummins accelerator fault document is a diagnostic sheet for Fault Code 134 on the remote accelerator pedal or lever position sensor circuit. It explains the low-voltage condition, the ECM response, possible causes, and service checks for the remote accelerator position signal circuit.
Official Cummins accelerator fault document details
| Brand | Cummins |
|---|---|
| Model coverage | ISB, ISC, and ISL; file group lists ISB6.7 CM2150 (2007-09) |
| System/Group | DTCs; Remote Accelerator Pedal or Lever Position Sensor 1 Circuit |
| Publication no. | Not shown in extract |
| Year/Revision | Last Modified: 20-Jul-2010; year unknown in file data |
| Pages | 4 |
| File size | 0.2 MB |
| Format | |
| Language | English |
Document table of contents
- Overview
- Circuit Description
- Component Location
- Conditions for Running the Diagnostics
- Fault Code: 134
- PID: P372
- SPN: 974
- FMI: 4/4
- Action Taken When the Fault Code is Active
- Conditions for Clearing the Fault Code
- Shop Talk
- Possible causes of this fault include
- Refer to Troubleshooting Fault Code t05-134
Applicable truck models
This diagnostic information applies to Cummins ISB, ISC, and ISL engines where the OEM installation uses a remote accelerator pedal or lever position sensor. The file information also places it under ISB6.7 CM2150 (2007-09) DTCs. The document states that the remote accelerator pedal or lever location varies by original equipment manufacturer, so component location must be checked in the OEM service manual. For manufacturer information, visit Cummins official website.
Who needs this Cummins accelerator fault manual
This Cummins accelerator fault manual is for diesel technicians diagnosing Fault Code 134, SPN 974, FMI 4/4, where the ECM detects remote accelerator pedal signal voltage below the normal operating range. Workshop owners can use it to identify whether the likely issue is a short to engine ground or return, a damaged remote accelerator position sensor, or an open circuit in the signal, supply, or return wiring.
The diagnostic runs continuously with the keyswitch in the ON position. The fault sets when the ECM detects remote accelerator pedal signal voltage less than 0.1-VDC for more than 1 second. When active, the red STOP ENGINE light is illuminated immediately, the remote accelerator will not operate, and the remote accelerator position is set to zero percent. The clearing condition is also direct: the ECM turns off the red STOP ENGINE light immediately after the diagnostic runs and passes.
The Shop Talk section points technicians to ECM calibration verification through QuickServe® Online and references Procedure 019-032 for ECM Calibration Code in the applicable troubleshooting and repair manual. For intermittent accelerator complaints, the extract says the INSITE™ electronic service tool can monitor remote accelerator pedal or lever position sensor signal voltage while the harness is flexed. Abrupt signal-voltage changes can reveal intermittent connections. The note also states that the three wires in the remote accelerator position sensor circuit must be twisted together.
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