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Home >> Hyundai >> 2021 >> Ioniq Plug-In Hybrid Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 29 (Double Clutch Transmission Diagnosis (PHEV) (2 Of 2)) >> DTC U0100-87: Lost Communication With ECM/PCM >> Wiring Inspection >> Circuit Inspection

Circuit Inspection

WARNING: This page is about a different car, the 2021 Kia Niro. However, it is still accessible from the selected car via links, so may be relevant.
G13360743Courtesy of KIA MOTORS AMERICA, INC.
G13360744Courtesy of KIA MOTORS AMERICA, INC.
Inspection Condition (+) Probe (-) Probe Specification
Connector Terminal Connector Terminal
  1. Ignition "ON".
TCM connector 44 (high) Chassis ground - Fig.1
TCM connector 45 (low) Chassis ground -
  1. Ignition "OFF".
  2. Disconnect battery (-) cable.
  3. Disconnect the electrical connector(s) from the concerned component.
TCM 44 (high) TCM 45 (low) Approx. 60Ω
  1. Ignition "OFF".
  2. Disconnect battery (-) cable.
  3. Disconnect the electrical connector(s) from the concerned component.
ECM connector (Component side) 55 (high) ECM connector (Component side) 77 (low) Approx. 120Ω
IGPM connector (Component side) 2 (high) IGPM connector (Component side) 1 (low) Approx. 120Ω
  1. Ignition "OFF".
  2. Disconnect battery (-) cable.
  3. Disconnect the electrical connector(s) from the concerned component.
IGPM connector 2 (high) Chassis ground - ∞ (infinity)Ω
IGPM connector 1 (low) Chassis ground - ∞ (infinity)Ω
G13360745Courtesy of KIA MOTORS AMERICA, INC.

Good 

No Good 

Module Circuit Inspection
Inspection Condition (+) Probe (-) Probe Specification
Connector Terminal Connector Terminal
  1. Ignition "OFF".
  2. Disconnect the electrical connector(s) from the concerned component.
  3. Ignition "ON".
ECM connector 73 (memory power) Chassis ground - Approx. 12V
  1. Ignition "OFF".
  2. Disconnect battery (-) cable.
  3. Disconnect the electrical connector(s) from the concerned component.
ECM connector 1, 3, 5 (ground) Chassis ground - Approx. below 1Ω
  1. Ignition "OFF".
  2. Disconnect battery (-) cable.
  3. Disconnect the electrical connector(s) from the concerned component.
TCM connector 44 (P-CAN high) ECM connector 55 (P-CAN high) Approx. below 1Ω
  1. Ignition "OFF".
  2. Disconnect battery (-) cable.
  3. Disconnect the electrical connector(s) from the concerned component.
TCM connector 45 (P-CAN low) ECM connector 77 (P-CAN low) Approx. below 1Ω

Good 

No Good