LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Hyundai >> 2015 >> Azera Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnosis (3 Of 3) >> DTC P0685: ECM/PCM Power Relay Control Circuit / Open >> W/Harness Inspection >> Power Circuit Inspection
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Power Circuit Inspection

■ Check voltage 

  1. IG "OFF" and disconnect the main relay.
  2. IG "ON".
  3. Measure the voltage between power supply terminals of main relay harness connector and chassis ground.

    Specification:  Approx. B+ (Battery Voltage)

    Fig 1: Measuring Voltage Between Power Supply Terminals Of Main Relay Harness Connector And Chassis Ground
    G10373793Courtesy of HYUNDAI MOTOR AMERICA
  4. Is the measured voltage within specification?

    YES 

    NO 

    • Check the fuse between battery and main relay.
    • Repair open or short to ground in power harness and go to "VERIFICATION OF VEHICLE REPAIR " procedure.