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Home >> Kia >> 2015 >> Optima Hybrid >> Repair and Diagnosis >> Brakes >> Parking Brake System >> Electric Parking Brake Diagnosis - Optima HEV >> DTC C1646: CAN Signal Error TCU >> DTC Information >> DTC Detecting Condition

DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • CAN Message Monitoring
  1. Sensor or system error concerned TCU
  2. EPB ECU
Enable condition
  • C1616 (CAN BUS Off) no DTC
  • Normal battery voltage
  • Ignition "ON" after 2 sec.
Threshold value
  • Gear selector display signal is fault for over 50 times (more than 500 msec) within normal voltage condition
Warning Indicator Lamp Status
  • Warning Indicator Lamp "ON"
Fail Safe
  • Dynamic Braking (ESC) inhibited
  • EPB auto release function inhibited
Clear Condition
  • Ignition "OFF" and then "ON"