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DTC P1603 Can Communication Bus Off: DTC Detecting Condition

DTC DETECTING CONDITION

Item Detecting Condition & Fail Safe Possible Cause
DTC Strategy
  • Check voltage range
  • Open or Short in CAN communication harness.
  • Faulty ECM.
  • 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 > or = 10V is detected for a series of 0.5 sec
  • Engine STOP
Threshold Value
  • In case of no ECU information
Diagnostic Time
  • 1.5 Sec.
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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