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B-CAN Communication Line Inspection

Item Normal Value Prerequisite Condition Probe (+) Probe (-)
CAN communication line (short to power): Voltage Approx. 0V
  1. Ignition: OFF
  2. All Module (Unit): Disconnected
 WPC CAN High terminal Chassis ground
WPC CAN Low terminal Chassis ground
CAN communication line (short to power): Resistance ∞ (Infinite)Ω
  1. Ignition: OFF
  2. All Module (Unit): Disconnected
 WPC CAN High terminal Chassis ground
WPC CAN Low terminal Chassis ground
CAN communication line (Open/Short): Oscilloscope Refer to Figure below
  1. Ignition: OFF
  2. All Module (Unit): Connected
 WPC CAN High terminal WPC CAN Low terminal
G13064947Courtesy of HYUNDAI MOTOR AMERICA
  1. Is the measured value within specification?

    YES 

    • Fault might be intermittent and caused either by poor contact in connectors or wiring harness, or it has been repaired and control module memory is not cleared yet. Thoroughly check terminal of battery, all connectors (and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage.
    • Replace the WPC with an usable one and check for proper operation. If it works properly, put the component in place. Then, go to "VERIFICATION OF VEHICLE REPAIR ".

    NO 

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