Hyundai Genesis Coupe 3.8L GDI Cooling Fan Wiring Diagram SD253-2 (G6DJ)
Engine cooling system wiring diagram for a Hyundai 3.8L GDI showing cooling fan relays, fan motor resistor, and coolant temperature sensor.
This document is page SD253-2, "Cooling System (2)," a factory wiring diagram for the Hyundai G6DJ Lambda II 3.8L GDI engine's cooling fan circuit. It shows power supplied "hot at all times" from the E/R Junction Box LH through the ALT 150A multi fuse and the C/FAN 60A fuse, plus a switched feed ("hot with engine control relay on") from the E/R Junction Box RH through the SENSOR1 10A fuse and joint connector JCL83. The diagram traces circuits through the Cooling Fan (Low) Relay and Cooling Fan (High) Relay (connectors E43 and E42), to the Cooling Fan Motor with resistor (connector E05, ground GE01), and the Engine Coolant Temperature Sensor (connector CLG11). The ECM (connectors ELG-A and CLG-B) controls the low relay at pin 91 and high relay at pin 71, receives C-CAN High/Low on ELG-A pins 10 and 35, and ECTS signal/ground on CLG-B pins 35 and 55. Wire gauges and colors are noted (e.g., 5.0W, 5.0R, 0.3W/B, 0.3G, 0.3L, 0.3Gr, 0.5B, 0.3B), and cross-references point to Power Distribution (SD110-5), Data Link Details (SD200-5), and Engine Control System (SD313-17), plus photo references for component locations.
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Frequently asked questions
- What fuses protect the cooling fan circuit on the 3.8L GDI Genesis?
- The diagram shows the ALT 150A multi fuse and the C/FAN 60A fuse in the E/R Junction Box LH (hot at all times), plus the SENSOR1 10A fuse in the E/R Junction Box RH (hot with engine control relay on).
- Which ECM pins control the cooling fan relays?
- ECM pin 91 provides Cooling Fan (Low) Relay Control (0.3G wire) and pin 71 provides Cooling Fan (High) Relay Control (0.3L wire).
- What connectors are used for the cooling fan relays and motor?
- The Cooling Fan (Low) Relay uses connector E43, the Cooling Fan (High) Relay uses connector E42, and the Cooling Fan Motor uses connector E05 with ground point GE01.
- Where does the engine coolant temperature sensor connect?
- The ECT sensor (connector CLG11) sends its signal on a 0.3Gr wire to ECM connector CLG-B pin 35, with ground on a 0.5B wire to CLG-B pin 55; a 0.3B wire also goes to the Engine Control System (see SD313-17).
- Which engine does this wiring diagram apply to?
- The diagram is labeled G6DJ : LAMBDA II 3.8L GDI, page SD253-2, Cooling System (2).
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