ECM SYSTEM
WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, DM
1-220
(22) FPP (Foot Pedal Position Switch) (DTC 1121, 2121, 2126, 2122, 2123, 2127,
2128)
DTC 1121-FPP1/2 Simultaneous Voltages Out-of-Range
• Hardware: Foot Pedal Position/Throttle control sensor
• Enabling Conditions: Key On, Engine Off
• Set Conditions: FPP voltage is higher than 4.80 V or lower than 0.20 V, and FPP voltage is higher than 4.80 V or
lower than 0.20 V for longer than 0.5 second
• Corrective Action(s): Illuminate MIL, Power derate 2, Low rev limit, Forced idle
• Non-emissions related fault
• Possible Causes:
This fault is only applicable with sensors that incorporate dual potentiometer and indicates that FPP1 and FPP2
voltages are out-of-range resulting in a loss of redundancy.
DTC 2121-FPP1 Lower Than FPP2
• Hardware: Foot Pedal Position /Throttle control sensor
• Enabling Conditions: Key On, Engine Off
• Set Conditions: (FPP1 % - FPP2 %) is lower than -20 for longer than 1.5 seconds
• Corrective Action(s): Illuminate MIL, Power derate 2, Low rev limit
• Non-emissions related fault
• Possible Causes:
This fault indicates that the measured % deflection of sensor 1 is less than sensor 2 by an amount defined in
calibration.
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