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Last Modified: 9-16-2014 6.6 C Doc ID: RM000000T8X0EKX Model Year: 2015 Model: Tundra Prod Date Range: [08/2014 - ] Title: 3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0230; Fuel Pump Primary Circuit; 2015 MY Tundra [08/2014 - ] DTC P0230 Fuel Pump Primary Circuit DESCRIPTION When a malfunction in the fuel pump circuit is detected, DTC P0230 is stored. signal and sent to the fuel pump ECU. Based on the signal sent from the ECM, the fuel pump ECU adjusts the fuel pump operation speed between 3 settings. The fuel pump ECU also has a self-diagnosis function. Based on the fuel pump circuit condition, the fuel pump 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. DTC DETECTION CONDITION TROUBLE AREA P0230 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 circuit Fuel pump Fuel pump ECU ECM MONITOR DESCRIPTION To monitor the fuel pump circuit, the ECM checks the fuel pump control signal (FPC) and diagnostic signal (DI). The FPC voltage varies between approximately 0 V to approximately 12 V (duty signal). Based on the if the fuel pump circuit is malfunctioning. When the ECM determines that the fuel pump circuit is malfunctioning, a DTC is set immediately. WIRING DIAGRAM 3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0230; Fuel... |