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Home >> Kia >> 2020 >> Optima SX >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 31 (Dual Clutch Transmission Diagnosis - 1.6L (2 Of 2) (Except HEV)) >> DTC U0121-87: Lost Communication With Anti-Lock Brake System (ABS) Control Module >> Wiring Inspection >> CAN Communication Line Inspection >> Resistance measurement with matching resistor

Resistance measurement with matching resistor

WARNING: This page is about a different variant/trim than selected.
  1. Ignition "OFF" and disconnect the battery and wait about four minutes.
  2. Make sure all modules are properly connected.
  3. Measure resistance between Pin No. 3 (C-CAN High) and Pin No. 11 (C-CAN Low) terminal of Data Link Connector (DLC).

    Specification:  Approx. 60Ω

  4. Is measured value within specification?

    YES 

    • Check each module connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO 

    * If the measured value is approx. 0Ω, then check for short CAN communication line.

    * If the measured value is approx. 120Ω, then check for open CAN communication line of control module with resistor.

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