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Home >> Kia >> 2020 >> Optima S >> Repair and Diagnosis >> External Pages >> Different car >> Section 61 (Integrated Gateway Power Module Diagnosis) >> DTC B1581-00: Ignition Switch Signal Error >> DTC Information And Inspection >> DTC Setting Condition
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DTC Setting Condition

WARNING: This page is about a different car, the 2020 Hyundai Kona. However, it is still accessible from the selected car via links, so may be relevant.
Troubleshooting Condition Possible Cause
Main Action
  • Check CAN communication
  1. Open/Poor Connection in BCM*_"ON/START input"
  2. Short-to-Battery in BCM*_"ON/START input"
  3. Short-to-Ground in BCM*_"ON/START input"
Prerequisite Condition
  • Power Voltage: Between 9V and 16V
  • B-CAN network is activating
  • B-CAN bus is normal
  • B-CAN bus is not Limp Home mode
  • B-CAN network monitoring is complete
Threshold Value
  • Mismatch between IG key signal of CGW* and IG key signal B-CAN data of BCM*
Diagnosis Time
  • 5sec
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