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HOMESERVICE MANUALSKIA2015FORTE EXREPAIR AND DIAGNOSIS (SINGLE PAGE)BRAKESANTI-LOCK BRAKESELECTRONIC STABILITY CONTROL (ESC) SYSTEM DIAGNOSISDTC C1687: CAN TIME-OUT VSM2 (MDPS)WIRING INSPECTIONCAN COMMUNICATION LINE INSPECTION
2015 Kia Forte EX

CAN Communication Line Inspection

2015 Kia Forte EXSECTION CAN Communication Line Inspection
  • CAN Communication Line Short To Ground Check 
    1. Ignition "OFF".
    2. Make sure all modules are properly connected
    3. Measure resistance between CAN High terminal of Data Link Connector (DLC) and chassis ground.
    4. Measure resistance between CAN Low terminal of Data Link Connector (DLC) and chassis ground.

      Specification:  ∞ Ω

  • CAN Communication Line Short To Battery Check 
    1. Ignition "OFF".
    2. Make sure all modules are properly connected.
    3. Ignition "ON".
    4. Measure voltage between CAN High terminal of Data Link Connector (DLC) and chassis ground.
    5. Measure voltage between CAN Low terminal of Data Link Connector (DLC) and chassis ground.

      Specification: 

      CAN High to chassis ground: Approx. 2.6V

      CAN Low to chassis ground: Approx. 2.4V

  • CAN Communication Line Open Check 
    1. Ignition "OFF".
    2. Disconnect HECU connector and PCM connector.
    3. Measure resistance between CAN High terminal of HECU harness connector and CAN High terminal of MDPS ECU harness connector.
    4. Measure resistance between CAN Low terminal of HECU Harness connector and CAN Low terminal of MDPS ECU harness connector.

      Specification:  Below 1Ω

    5. Are the measured values within specifications?

      YES 

      NO 

      • Repair open or short in CAN BUS line between HECU harness connector and EPS ECU harness connector and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
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.