Impco HHI, Service Manual

Page: 408 / 485

408
DTC 2122-FPP 1 High Voltage
Conditions for Setting the DTC

Foot Pedal Position

Check Condition-Key On

Fault Condition-FPP1 sensor voltage exceeds 4.00 volts

MIL-On during active fault

Low rev limit

Force idle
Circuit Description
The Foot Pedal Position sensor uses a variable resistor to determine signal voltage based on
pedal position. This fault will set if the FPP 1 voltage exceeds 4.00 volts at any operating con-
dition while the key is on. If the voltage exceeds 4.00 volts the FPP is considered to be out of
specification. The MIL command is ON. Forced idle and low rev limit will be in effect during this
code set limiting full power output.
Diagnostic Aid
FPP sensors are OEM specific and vary in configuration. The exact wire color and pin num-
bers for the FPP connection must be verified in the OEM chassis wiring schematic. The FPP
sensor used in this system provides an FPP signal and an IVS (Idle validation) sensor in one
packaged assembly. FPP and IVS are not serviceable individually, and in the event of a failure
the complete foot pedal sensor assembly must be replaced.