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Home >> Hyundai >> 2005 >> Tucson LX, FWD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle System >> DTC Troubleshooting Procedure >> DTC P1603 Can Communication Bus Off >> Signal Circuit Inspection

Signal Circuit Inspection

  1. Ignition "ON" & Engine "OFF".
  2. Disconnect the "TCM" connector.
  3. Measure resistance between terminal "3" and "4" of the "TCM" harness connector.

    Specification: approx. 60 Ω

    Fig 1: Measuring Resistance Between Terminals 3 & 4 Of TCM Harness Connector
    G03763462Courtesy of HYUNDAI MOTOR CO.
  4. Is measured resistance within specifications?

    YES 

    • Substitute with a known-good TCM and check for proper operation. If the problem is corrected, replace TCM as necessary and then refer to VERIFICATION OF VEHICLE REPAIR .

    NO 

    • Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration or damage of ECM. and then Repair or replace Resistance for CAN communication as necessary and refer to VERIFICATION OF VEHICLE REPAIR .
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