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Home >> Hyundai >> 2021 >> Santa Fe SE, AWD >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> SBW Control Unit Diagnosis (Except HEV) >> DTC U0121-82: Lost Communication With Anti-Lock Brake System (ABS) Control Module >> Wiring Inspection >> Circuit Inspection

Circuit Inspection

Item Normal Value Prerequisite Condition Probe (+) Probe (-)
CAN communication line: oscilloscope Refer to HIGH SPEED CAN COMMUNICATION 
  1. Ignition: ON
ESP/ESC CAN high terminal Chassis ground
ESP/ESC CAN low terminal Chassis ground
CAN Communication Line: Resistance Approx. 120Ω
  1. Ignition: OFF
  2. ECM connector: Disconnected
ECM CAN high terminal (Component side) ECM CAN low terminal (Component side)
Approx. 120Ω
  1. Ignition: OFF
  2. ICU connector: Disconnected
ICU CAN high terminal (Component side) ICU CAN low terminal (Component side)
  1. Is the measured value within specifications?

YES 

NO