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Home >> Hyundai >> 2004 >> Elantra GLS, Automatic >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel System >> DTC Trouble Shooting Procedures >> DTC P1602: Serial Communication Problem With TCM (Time Out) >> Inspection Procedures >> 3. Check For Short To Ground In Harness
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3. Check For Short To Ground In Harness

  1. Keep the ECM and TCM connectors disconnected.
  2. Measure the resistance between terminal 7 of the ECM harness connector and chassis ground.
  3. Measure the resistance between terminal 6 of the ECM harness connector and chassis ground.
    Fig 1: Checking TCM To ECM Harness For Short To Ground
    G00746708Courtesy of HYUNDAI MOTOR CO.

Does each resistance indicate open? 

Yes: Go to next step.

No: Repair short to chassis ground in harness.