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Home >> Hyundai >> 2009 >> Tucson GLS, Automatic >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle System >> Troubleshooting for DTC >> U0001 CAN Communication Bus Off >> DTC Detecting Condition

U0001 CAN Communication Bus Off: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • Check voltage range
  • Open or Short in CAN communication harness
  • Faulty TCM
Enable Conditions
  • IG switch on
  • No actuator test
  • No FAIL SAFE status of 3rd gear holding
  • No FAIL in PG-A.B
  • Power voltage ≥ 10V is detected for a series of 0.5 sec
  • Engine STOP,
Threshold Value
  • In case of no ECU information.
Diagnostic Time
  • 1.5sec
Fail Safe
  • INTELLIGENT SHIFT and is inhibited
  • Learning for oil pressure control is inhibited
  • Torque Retard requirement is inhibited
  • Direct connection control of TCC is inhibited
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