8. WHEN FUEL GAUGE DOES NOT OPERATE 8. WHEN FUEL GAUGE DOES NOT OPERATE (check warning lamp ON/OFF) · Before disconnecting the connector, always turn the starting switch OFF. · Before carrying out below procedure, check all the related connectors are properly inserted. · After checking, insert the disconnected connectors again immediately unless otherwise specified. Check Table HYUNDAI Red range MCU FUEL SENDER 18 CD-2 CN-51 5-30 YES Is resistance YES between CN-51 (18) and (GND) over 1kΩ? YES Starting switch : OFF Check resistance Does the gauge Disconnect CN-51 between CD-2 move up and NO (1) and (2) down at lamp NO check? Disconnect CD-2 See Table Starting switch :
ON NO Cause Remedy Disconnection in wiring harness Defective MCU Defective fuel sensor Defective cluster Check and repair Replace Replace Replace Level Item Empty 1/2 Full Unit Resistance (Ω) 700 300 ~100 Tolerance (%) ±5 ±8 ±5 2 1