Hyundai Genesis Coupe 2.0L G4KF Power Distribution Wiring Diagram SD110-3
Power distribution wiring diagram for a Hyundai G4KF 2.0L engine showing ECU, engine control relay, ignition coils, and oxygen sensor circuits.
This is page SD110-3, "Power Distribution (3)," a factory wiring diagram for the Hyundai G4KF-GSL 2.0L engine (Genesis Coupe 2.0T). It shows how battery power flows from the B+ 50A feed (referenced on SD110-2) through the E/R Junction Box RH via the ECU 30A fuse to a joint connector (JCH82), then to the Engine Control Relay (connector CHG99). Downstream, the relay feeds the IGN COIL 20A fuse, which supplies the four ignition coils through joint connector JCH81 (with separate connector pinouts for vehicles with and without an immobilizer: CHG18-1 through CHG18-4 vs. CHG15-1 through CHG15-4), the condenser (CHG19), and the ECM (CHG-K). Other branches feed the ECU-2 20A fuse, SNSR-1 10A fuse (powering upstream and downstream oxygen sensors via CHG16/CHG17 and joint connector JCH83), and cross-references to SNSR-2 15A and INJECTOR 15A fuses on page SD110-4. The E/R Junction Box LH section shows W/B wires feeding the Cooling Fan (HI) Relay (E51), Cooling Fan (LO) Relay (E52), and A/CON Relay (E56). Wire colors (R, P, Y, G, L, W/B, P/B) and connector pin numbers are labeled throughout, making this useful for diagnosing no-spark, O2 sensor power, or cooling fan relay power issues.
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Frequently asked questions
- What fuse powers the ignition coils on the Genesis Coupe 2.0L?
- The IGN COIL 20A fuse, fed through the Engine Control Relay, supplies the ignition coils via joint connector JCH81.
- Which fuse feeds the oxygen sensors?
- The SNSR-1 10A fuse supplies power through joint connector JCH83 to the upstream oxygen sensor (connector CHG16) and downstream oxygen sensor (connector CHG17).
- Where does the ECU get its power in this diagram?
- Power comes from the B+ 50A feed (see SD110-2) through the ECU 30A fuse in the E/R Junction Box RH, and there is also an ECU-2 20A fuse branch feeding the ECM.
- What relays are shown in the E/R Junction Box LH?
- The Cooling Fan (HI) Relay (connector E51), Cooling Fan (LO) Relay (E52), and A/CON Relay (E56), fed by W/B wires via connector EC21.
- Does the coil wiring differ with the immobilizer?
- Yes. The diagram shows separate branches: without immobilizer the coils use connectors CHG18-1 through CHG18-4; with immobilizer they use CHG15-1 through CHG15-4.
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