Volvo All Engines (2017 Emissions) Fault Code: P113F12 PID: EMS Buffered Idle Validation Switch Wire – VECU Side
Volvo All Engines (2017 Emissions) Fault Code: P113F12 PID: EMS Buffered Idle Validation Switch Wire – VECU 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) A diagnostic trouble code (DTC) is set if the output signal from the buffered idle validation (IV) switch diverges from the input signal from idle validation (IV) switch 1
2) Accelerator pedal (AP) released
3) The voltage at pin EI:8 is more than 7 V
Probable cause
1) Signal wire
2) Engine control module (ECM)
3) Vehicle Control Unit (VECU)
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