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Home >> Hyundai >> 2015 >> Sonata Eco >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 120 (Air Conditioning System Diagnosis (HEV)) >> DTC B1691: D/CLOCK Reference High >> General Information >> DTC Detecting Condition

General Information: DTC Detecting Condition

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Item Detecting Condition Possible Cause
DTC Strategy
  • Voltage check
  1. Open in signal circuit
  2. Short to Battery in signal circuit
  3. Faulty Digital Clock
  4. Faulty A/C Control Unit
Enable Conditions
  • Ignition ON
Threshold Value
  • Power supply is more than 3.75 V for more than 0.3 second
Fail-Safe
  • The Ambient Sensor is not affected by the Clock's Reference power
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