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Home >> Hyundai >> 2015 >> Sonata Eco >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 120 (Air Conditioning System Diagnosis (HEV)) >> DTC B1249: Direction Potentiometer Open (Low) Driver >> W/ Harness Inspection >> Signal Circuit Inspection

Signal Circuit Inspection

WARNING: This page is about a different variant/trim than selected.

■ Check for Open in Harness 

  1. Ignition "OFF"
  2. Disconnect Driver Direction actuator and A/C control unit main harness connector.
  3. Measure resistance between Signal (F/B) terminal of Driver Direction actuator harness connector and Signal (F/B) terminal of A/C-ECU harness connector.

    Specification  : below 1

    Fig 1: Measuring Resistance Between Driver Direction Actuator Harness Connector And A/CECU Harness Connector
    G10591108Courtesy of HYUNDAI MOTOR AMERICA
  4. Is the measured resistance within specification?

    YES 

    NO 

■ Check Short to Ground in Harness 

  1. Ignition "OFF"
  2. Disconnect Driver Direction actuator and A/C control unit main harness connector.
  3. Measure resistance between Signal (F/B) terminal of Driver Direction actuator harness connector and chassis ground.

    Specification  : Infinity

    Fig 2: Measuring Resistance Between Driver Direction Actuator Harness Connector And Chassis Ground
    G10591109Courtesy of HYUNDAI MOTOR AMERICA
  4. Is the measured resistance within specification?

    YES 

    NO