Volvo All Engines (2017 Emissions) Fault Code: P114123 PID: EMS Buffered Idle Validation Switch Wire – ECM Side
Volvo All Engines (2017 Emissions) Fault Code: P114123 PID: EMS Buffered Idle Validation Switch Wire – ECM Side
The Idle Validation Switch is open at the idle position and transmits no voltage to the (VECU) Vehicle Electronic Control Unit. At approximately 1-13% pedal position the Idle Validation Switch closes and completes the circuit to the (VECU) Vehicle Electronic Control Unit.
The (VECU) Vehicle Electronic Control Unit then sends a voltage signal to the Engine Control Module (ECM) indicating accelerator pedal position. If both communication links (J1939, J1587) are faulty the pedal demand functionality enters limp-home. During limp-home the (IVS) Idle Validation Switch is used for ramping requested torque.
Conditions for diagnostic trouble code (DTC):
1) Accelerator pedal signal does not correspond to actual accelerator pedal position
Observable symptoms
1) The engine does not respond when accelerator pedal is pressed.
Probable cause
1) Accelerator pedal
2) Wiring harness
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