Hyundai Genesis Coupe 2.0L Theta II Fuel Pump & MFI Wiring Diagram SD313-1
Wiring diagram of the Theta II 2.0L MFI control system showing the ECU, fuel pump relay, injectors, oxygen sensors and connectors.
This document is page SD313-1 of a Hyundai service wiring diagram covering the MFI (Multi-point Fuel Injection) Control System for the G4KF-GSL 2.0L Theta II engine, sheet 1. It shows power distribution from the E/R (engine room) Junction Box RH, including the ECU-1 10A fuse, ECU 30A fuse, F/PUMP 20A fuse, SNSR-1 10A, SNSR-2 15A, and INJECTOR 15A fuses, all fed from a HOT AT ALL TIMES bus. The diagram traces circuits through the Engine Control Relay (CHG99), Fuel Pump Relay (CHG97), and joint connectors JCH82, JCH83, and JCH84 to the upstream and downstream oxygen sensors (CHG16/CHG17 with heater and sensor elements), fuel injectors #1–#4 (CHG24-1 through CHG24-4), and the fuel pump motor within the fuel sender assembly, grounded at GF03. Intermediate connectors EC21, EF11, and F39 are shown in the fuel pump feed path with R/W wiring. ECM connector CHG-K pin numbers and functions are listed, including memory power (pin 6), engine control relay control (64), sensor grounds/signals, heater controls, injector drivers (25–28), and fuel pump relay control (pin 70). Wire colors and photo references for connector locations are given throughout.
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Frequently asked questions
- What fuse powers the fuel pump on the 2.0L Theta II Genesis Coupe?
- The F/PUMP 20A fuse in the E/R Junction Box RH feeds the fuel pump relay (CHG97), which then powers the fuel pump motor.
- Which connectors are in the fuel pump power circuit?
- From the fuel pump relay CHG97, the circuit runs through connector EC21 (pin 6, R/W wire), EF11 (pin 3, R/W wire), and F39 (pins 4 and 5) to the fuel pump motor in the fuel sender assembly, with ground at GF03.
- What ECM pin controls the fuel pump relay?
- ECM connector CHG-K pin 70 is labeled Fuel Pump Relay Control.
- Which ECM pins drive the fuel injectors?
- Pin 25 = Injector #1 (G wire), pin 26 = Injector #3 (L wire), pin 28 = Injector #2 (P wire), pin 27 = Injector #4 (O wire). The injectors are connectors CHG24-1 through CHG24-4.
- What fuses supply the MFI control system?
- ECU-1 10A, ECU 30A, F/PUMP 20A, SNSR-1 10A, SNSR-2 15A, and INJECTOR 15A, all located in the E/R Junction Box RH on a HOT AT ALL TIMES feed.
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