2. Check For Open In Harness

1. Turn ignition switch to OFF position and disconnect the ECM and TCM connectors.
2. Measure the resistance between terminal 7 of the ECM harness connector and 3 of the TCM harness connector.
3. Measure the resistance between terminal 6 of the ECM harness connector and 4 of the TCM harness connector.
   Fig 1: Checking TCM To ECM Harness For Open Circuit

   Courtesy of HYUNDAI MOTOR CO.

• Specification: below 1Ω 

Does each resistance indicate continuity? 

Yes: Go to next step.

No: Repair open in harness.