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Home >> Hyundai >> 2008 >> Santa Fe GLS, FWD, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Transfer Case Assembly) >> Transfer Case Assembly >> DTC U0101 Serial Communication Problem With TCU (Timeout) >> DTC Detecting Condition

DTC U0101 Serial Communication Problem With TCU (Timeout): DTC Detecting Condition

WARNING: This page is about a different variant/trim than selected.
DTC DETECTING CONDITION CHART

Item Detecting Condition Possible Cause
DTC Strategy
  • TCU-ITM communication line or ECU side malfunction. (A/T only)
  • CAN HIGH/LOW circuit open/short
  • Faulty TCU
  • Faulty TCCU
Enable Conditions
  • Message present 1.0 sec self clearing
Threshold Value
  • Loss of TCU1 message for greater than 1 second, and a fault will be set. This fault applies to an automatic transmission only
Diagnostic Time
  • 1 sec
MIL on condition
  • 0.5 Sec
Fail Safe
  • Trans gear set to first, engine torque set to zero, ECU will not send current to the clutch coil
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