DTC P0230: Fuel Pump Primary Circuit [09/2014 - 01/2023]: Description

When a malfunction in the fuel pump (for low pressure side) circuit is detected, DTC P0230 is stored. The fuel pump circuit consists of the ECM, fuel pump (for low pressure side) and fuel pump control ECU (which operates the fuel pump). Based on the engine output, the ECM determines the fuel pump speed. The speed is then converted to a duty signal and sent to the fuel pump control ECU. Based on the signal sent from the ECM, the fuel pump control ECU adjusts the fuel pump operation speed between 3 settings. The fuel pump control ECU also has a self-diagnosis function. Based on the fuel pump circuit condition, the fuel pump control ECU outputs a diagnostic signal (DI) to the ECM, and the ECM determines if there is a malfunction in the fuel pump circuit.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory
P0230	Fuel Pump Primary Circuit	When either condition below is met (1 trip detection logic): When fuel pump is operating: Remaining fuel is 17 L or more DI terminal output is low When fuel pump is not operating: DI terminal output is high	Open or short in fuel pump (for low pressure side) circuit Fuel pump (for low pressure side) Fuel pump control ECU ECM	Does not come on	DTC stored