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HOMESERVICE MANUALSKIA2015OPTIMA EXREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEDOOR LOCKSSMART KEY UNIT DIAGNOSIS - OPTIMA (EXCEPT HEV)DTC B1604: CAN TIME-OUT BETWEEN SMK AND (IPM OR BCM)DTC INFORMATIONDTC DETECTING CONDITION
2015 Kia Optima EX

DTC Information: DTC Detecting Condition

2015 Kia Optima EXSECTION DTC Detecting Condition
DTC DETECTING CONDITION AND POSSIBLE CAUSES

Item Detecting Condition Possible cause
DTC Strategy
  • Checking receiving status of CAN message from BCM (IPM)
  1. Check BCM (IPM) installation
  2. Check fuses related to BCM (IPM)
  3. Check open in CAN high/Low of BCM (IPM)
  4. Check open in CAN high/low in SMK
Enable Conditions
  • SMK IGN ON or Engine ON
Threshold value
  • No CAN signal from BCM (IPM) for 10 seconds
Diagnostic Time
  • Right after DTC detected
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.