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Home >> Hyundai >> 2017 >> Sonata Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 42 (Engine Control System Diagnosis - 2.0L (2 Of 3) (Except HEV)) >> DTC P0326: Knock Sensor 1 Circuit Range/Performance (Bank 1 Or Single Sensor) >> Component Inspection

Component Inspection

WARNING: This page is about a different variant/trim than selected.
  1. Component resistance inspection
    1. IG "OFF". Disconnect knock sensor connector.
    2. Measure resistance between signal terminal and ground terminal of the sensor connector (Component side).

      Specification:  Approx. 5 MΩ at 20°C (68°F)

  2. Output signal inspection
    1. Remove knock sensor from vehicle and secure (across mounting boss) in a shop vise.
    2. Set up an oscilloscope as follows: Channel A (+): Signal terminal, (-): Ground terminal
    3. Rap on vise with a ball peen hammer while monitoring oscilloscope screen (there should be a spike of less than 1 volt with each hammer strike).

      Specification:  knock sensor send a voltage spike with hammer strikes

  3. Installation torque inspection
    1. Check the installation torque of the knock sensor.

      Specification:  Approx. 16 ~ 28 N.m (160~250 kg.cm, 11.8~18.4 lb-ft)

  4. Has a problem been found?

    YES 

    • Check knock sensor for contamination, deterioration, or damage. Substitute with a known-good sensor and check for proper operation. If the problem is corrected, replace sensor and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO 

    • Check for poor connection between PCM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
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