hyundai Workshop Repair Guides

Hyundai Workshop Service and Repair Manuals

Main Relay (Computer/Fuel System)|Testing and Inspection|Page 2864 > < Knock Sensor|Locations|Page 2860
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Main Relay (Computer/Fuel System): Testing and Inspection

When the ignition switch is on, battery power is supplied to the ECM, the injectors, the mass air flow sensor, etc. While the ignition switch is turned on,
current flows from the ignition switch through the current relay coil to ground.

Circuit Diagram

Harness Inspection Procedure (Step 1 - 2)

MFI CONTROL RELAY INSPECTION

Main Relay (Computer/Fuel System)|Testing and Inspection|Page 2864 > < Knock Sensor|Locations|Page 2860