Cummins ISX11.9 code 134 is the Cummins troubleshooting document for the Remote Accelerator Pedal or Lever Position Sensor 1 Circuit – Voltage Below Normal or Shorted to Low Source fault (PID P372, SPN 974, FMI 4/4). The remote accelerator position sensor is a potentiometer on the remote accelerator lever that varies its signal voltage to the ECM from low at 0 percent to high at 100 percent, using a 5 volt supply, return, and signal circuit. It sets a red warning lamp and lists the exact conditions, causes, and step-by-step checks a technician follows.
Official document details
| Brand | Cummins |
|---|---|
| Model coverage | ISX11.9 CM2250, ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, and ISX15 CM2250 |
| System / Group | ISX11.9 CM2250 (2010-12) / DTCs |
| Fault identifiers | PID P372, SPN 974, FMI 4/4 |
| Warning lamp | Red |
| Pages | 17 |
| Format | |
| Language | English |
Document table of contents
- Overview and circuit description
- Component location
- Conditions for running the diagnostics
- Conditions for setting the fault code
- Action taken when the fault code is active
- Conditions for clearing the fault code
- Shop Talk and possible causes
- Associated procedures and troubleshooting steps
Trucks covered by Cummins ISX11.9 code 134
This procedure applies to ISX11.9 CM2250, ISB6.7 CM2250, ISC8.3 and ISL9 CM2250, and ISX15 CM2250. This is an official Cummins fault-code troubleshooting procedure, cleared and verified with the Cummins INSITE electronic service tool. It is set by a remote accelerator pedal signal voltage below 0.008 VDC for more than 1 second, and typical effects include the red STOP ENGINE lamp illuminating, the remote accelerator no longer operating, and remote accelerator position being set to 0 percent. For engine specifications and dealer support, see the official Cummins website.
Who needs this Cummins ISX11.9 code 134 manual
Heavy-truck technicians, fleet maintenance teams, and workshop owners diagnosing this fault use it to confirm the code before replacing parts. During diagnosis the remote accelerator location varies by OEM so the OEM service manual must be referenced, and repairs are confirmed with the Cummins INSITE electronic service tool. The diagnostic runs continuously with the keyswitch in the ON position, and the repair is validated by returning the code to inactive status.
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