Why is my SPN 91 FMI not working?

Why is my SPN 91 FMI not working?

REASON: Accelerator Pedal or Lever Position Sensor 1 Circuit – Voltage Below Normal or Shorted to Low Source. Low voltage detected at accelerator pedal position number 1 signal circuit. EFFECT: Severe derate in power output of the engine. Limp home power ONLY.

What is the SPN code for Caterpillar J1939?

The Society of Automotive Engineers (SAE) developed the J1939 standards and SPN code terms have been assigned for specific parameters (component or system circuits) that diagnostic trouble codes (DTC) are associated with. Only the SPN numbers that are intended to be used on Caterpillar ® products are listed.

What does SPN stand for on a body controller?

DEFINITIONS •“SPN” represents the Suspect Parameter Number. This number identifies the item for which diagnostics are being reported. •“FMI” is the Failure Mode Indicator. This number represents the type of failure detected. Refer to Failure Mode Indicators (FMI) below for more information. 2 BODY CONTROLLER DIAGNOSTIC TROUBLE CODES (S08327)

What is the Suspect Parameter Number ( SPN )?

The Suspect Parameter Number (SPN) is diagnostic fault code terminology found on some Caterpillar ® products using a J1939 CAN data link.

What kind of FMI does a diesel engine use?

It wont Accelerate, just idles. Has a SPN132 FMI4. I Have Replaced the mass air sensor with a genuine international. It wont Accelerate, just idles. Has a SPN132 FMI4. I Have… Auto Mechanics 1&2/diesel…

Is the warrior Idles fine when trying to accelerate?

The warrior idles fine. I’ve adjusted to air mix screw back and forth. It changes the idol but doesn’t seem to improve things when I try to rev it up. 2.25 turns seems to be the sweet spot, as far as idol. The needle is where zoom put it.

Why does my Raptor idle when trying to accelerate?

Sounds like the accelerator pump isn’t working, or pilot is partially plugged, or air mixture is too lean. May be a combo of several of those things. When my sons Raptor was doing that, it was because the pilot was too small, then had to tweak the air mixture to get it just right.

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