SPN 91 - FMI 4 (Fault Code 133)
SPN 91 - FMI 4 (Fault Code: 133)
SPN91 FMI4
CODES:
Fault Code: 133
PID(P), SID(S): P372
SPN: 974
FMI: 3/3
Lamp: RED
SRT:
REASON: Remote Accelerator Pedal or Lever Position Sensor 1 Circuit - Voltage Above Normal or Shorted to High Source. High signal voltage detected at remote accelerator position signal circuit.
EFFECT: Remote accelerator will not operate. Remote accelerator position will be set to zero percent.
Circuit Description:
The remote accelerator position sensor is a potentiometer attached to the remote accelerator lever. The remote accelerator position sensor varies the signal voltage to the electronic control module (ECM) as the remote accelerator lever is depressed and released. Low signal voltage is received by the ECM when the remote accelerator lever is at 0 percent. A high signal voltage is received by the ECM when the remote accelerator is at 100 percent. The remote accelerator pedal position circuit contains a remote accelerator pedal position 5 volt supply, remote accelerator pedal position return, and remote accelerator pedal position signal.
SPN91 FMI4
 |
| ISB, ISC, and ISL - Remote Accelerator Pedal Position Sensor 1 Circuit |
CODES:
Fault Code: 133
PID(P), SID(S): P372
SPN: 974
FMI: 3/3
Lamp: RED
SRT:
REASON: Remote Accelerator Pedal or Lever Position Sensor 1 Circuit - Voltage Above Normal or Shorted to High Source. High signal voltage detected at remote accelerator position signal circuit.
EFFECT: Remote accelerator will not operate. Remote accelerator position will be set to zero percent.
Circuit Description:
The remote accelerator position sensor is a potentiometer attached to the remote accelerator lever. The remote accelerator position sensor varies the signal voltage to the electronic control module (ECM) as the remote accelerator lever is depressed and released. Low signal voltage is received by the ECM when the remote accelerator lever is at 0 percent. A high signal voltage is received by the ECM when the remote accelerator is at 100 percent. The remote accelerator pedal position circuit contains a remote accelerator pedal position 5 volt supply, remote accelerator pedal position return, and remote accelerator pedal position signal.
When the ECM senses a signal voltage lower than the normal operating range of the sensor, this fault code is set.
Component Location:
The remote accelerator pedal or lever location varies with each original equipment manufacturer (OEM).
Conditions for Running the Diagnostics:
This diagnostic runs continuously when the keyswitch is in the ON position.
Conditions for Setting the Fault Codes:
The ECM detects that the remote accelerator pedal signal voltage is greater than 4.5-VDC for more than 1 second.
Action Taken When the Fault Code is Active:
• The ECM illuminates the red STOP ENGINE light immediately when the diagnostic runs and fails.
Conditions for Clearing the Fault Code:
The ECM will turn off the red STOP ENGINE light immediately after the diagnostic runs and passes.
Shop Talk:
Possible causes of this fault include:
• Remote accelerator pedal or lever position signal circuit shorted to battery or +5 volt supply.
• Open remote accelerator pedal or lever return circuit in the harness or connections.
• Remote accelerator supply shorted to battery.
• Failed remote accelerator pedal or lever position sensor.
NOTE: The three wires in the remote accelerator position sensor circuit must be twisted together.
Read More:
SPN 91 - FMI 4 (Fault Code 132)
SPN 91 - FMI 3 (Fault Code 131)
Blog.Teknisi
The remote accelerator pedal or lever location varies with each original equipment manufacturer (OEM).
Conditions for Running the Diagnostics:
This diagnostic runs continuously when the keyswitch is in the ON position.
Conditions for Setting the Fault Codes:
The ECM detects that the remote accelerator pedal signal voltage is greater than 4.5-VDC for more than 1 second.
Action Taken When the Fault Code is Active:
• The ECM illuminates the red STOP ENGINE light immediately when the diagnostic runs and fails.
Conditions for Clearing the Fault Code:
The ECM will turn off the red STOP ENGINE light immediately after the diagnostic runs and passes.
Shop Talk:
- Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe® Online for applicable fixes to the calibration stored in the ECM. If necessary, recalibrate the ECM.
- If troubleshooting an intermittent accelerator problem: The remote accelerator pedal or lever position sensor signal voltage can be monitored with the INSITE™ electronic service tool, while flexing the harness to locate the intermittent connection. Intermittent connections will show up as abrupt changes in signal voltage displayed by the INSITE™ electronic service tool.
Possible causes of this fault include:
• Remote accelerator pedal or lever position signal circuit shorted to battery or +5 volt supply.
• Open remote accelerator pedal or lever return circuit in the harness or connections.
• Remote accelerator supply shorted to battery.
• Failed remote accelerator pedal or lever position sensor.
NOTE: The three wires in the remote accelerator position sensor circuit must be twisted together.
Read More:
SPN 91 - FMI 4 (Fault Code 132)
SPN 91 - FMI 3 (Fault Code 131)
Blog.Teknisi
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