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Home >> Genesis >> 2021 >> G90 5.0 Ultimate, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 28 (Engine Control System Diagnosis - 3.3L (9 Of 9)) >> DTC U0164-00: Lost Communication with HVAC Control Module >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

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Item Detecting Condition Possible Cause
DTC Strategy
  • No Message from HVAC
  1. Poor connection or damaged harness
  2. Faulty CAN communication line between ECM and HVAC
  3. Faulty HVAC
Enable Conditions
  • Engine speed is faster than 32 RPM
  • Battery voltage is greater than 10V
  • Delay time after ignition switch on is more than 2.6 seconds
Threshold Value
  • No message during 500 msec. from HAVC ((Ambient Air Temperature Sensor)
Diagnosis Time
  • 1.5 seconds
MIL On Condition
  • 2 driving cycles
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