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4. Check For Short In Harness

  1. Keep the ECM and TCM connectors disconnected.
  2. Measure the resistance between terminals 6 and 7 of the ECM harness connector.
    Fig 1: Checking TCM To ECM Harness For A Short
    G00746709Courtesy of HYUNDAI MOTOR CO.

Specification: infinite 

Does resistance indicate open circuit? 

Yes: Go to next step.

No: Repair short in harness.