LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Kia >> 2020 >> Optima EX >> Repair and Diagnosis >> External Pages >> Different car >> Section 197 (4WD Control System Diagnosis) >> DTC U0122: Lost Communication With Vehicle Dynamics Control Module >> Wiring Inspection >> Circuit Inspection
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Circuit Inspection

WARNING: This page is about a different car, the 2021 Kia Seltos. However, it is still accessible from the selected car via links, so may be relevant.
G13485239Courtesy of KIA MOTORS AMERICA, INC.
G13485240Courtesy of KIA MOTORS AMERICA, INC.
Inspection Condition (+) Prove (-) Prove Reference
Connector Terminal Connector Terminal
  1. Ignition "ON".
4WD ECU connector 2 (P-CAN high) Chassis ground - Fig.1
4WD ECU connector 1 (P-CAN low) Chassis ground -
  1. Ignition "OFF".
  2. Disconnect the electrical connector(s) from the concerned component.
  3. Ignition "ON".
HECU connector (with EPB) 1, 30, 37 (power) Chassis ground - B+
  1. Ignition "OFF".
  2. Disconnect battery (-) cable.
  3. Disconnect the electrical connector(s) from the concerned component.
HECU connector (with EPB) 14, 46 (ground) Chassis ground - Approx. below 1Ω
  1. Ignition "OFF".
  2. Disconnect the electrical connector(s) from the concerned component.
  3. Ignition "ON".
HECU connector (W/O EPB) 1, 25, 32 (power) Chassis ground - B+
  1. Ignition "OFF".
  2. Disconnect battery (-) cable.
  3. Disconnect the electrical connector(s) from the concerned component.
HECU connector (W/O EPB) 13, 38 (ground) Chassis ground - Approx. below 1Ω
  1. Ignition "OFF".
  2. Disconnect the electrical connector(s) from the concerned component.
4WD ECU connector 2 (P-CAN high) Chassis ground - ∞ (infinity)Ω
4WD ECU connector 1 (P-CAN low) Chassis ground - ∞ (infinity)Ω
4WD ECU connector 2 (P-CAN high) HECU connector (with EPB) 23 (P-CAN high) Approx. below 1Ω
4WD ECU connector 1 (P-CAN low) HECU connector (with EPB) 22 (P-CAN low) Approx. below 1Ω
4WD ECU connector 2 (P-CAN high) HECU connector (W/O EPB) 8 (P-CAN high) Approx. below 1Ω
4WD ECU connector 1 (P-CAN low) HECU connector (W/O EPB) 7 (P-CAN low) Approx. below 1Ω
HECU connector (with EPB) 23 (P-CAN high) HECU connector (with EPB) 22 (P-CAN low) Approx. 60Ω
HECU connector (W/O EPB) 8 (P-CAN high) HECU connector (W/O EPB) 7 (P-CAN low) Approx. 60Ω
4WD ECU connector 2 (P-CAN high) 4WD ECU connector 1 (P-CAN low) Approx. 60Ω
G13485241Courtesy of KIA MOTORS AMERICA, INC.

Good 

No Good