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Home >> Lexus >> 2025 >> NX 350h >> Repair and Diagnosis >> External Pages >> Different car >> Section 71 (Heating / Air Conditioning System - Diagnostic Codes, Circuit Tests & Symptom Tests) >> AIR CONDITIONING SYSTEM (for Gasoline Model) >> DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0131-87: Lost Communication with Power Steering Control Module Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0155-87: Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message; DTC U0163-87: Lost Communication with Navigation Control Module Missing Message [11/2021 - ] >> Description

DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0131-87: Lost Communication with Power Steering Control Module Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0155-87: Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message; DTC U0163-87: Lost Communication with Navigation Control Module Missing Message [11/2021 - ]: Description

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2025 Lexus NX 350, 2025 Lexus NX 250, 2024 Lexus NX 350, 2024 Lexus NX 250, and 2023 Lexus NX 350. However, it is still accessible from the selected car via links, so may be relevant.
DTC No. Detection Item DTC Detection Condition Trouble Area Memory
U0100-87 Lost Communication with ECM/PCM "A" Missing Message Diagnosis Condition:
  1. IG voltage is 8.5 V or more.

Malfunction:

  1. No communication with ECM

Detection Time:

  1. Continuously for 10 seconds or more
  • CAN communication system
  • ECM
  • Air conditioning amplifier assembly
 Memorized
U0131-87 Lost Communication with Power Steering Control Module Missing Message Diagnosis Condition:
  1. IG voltage is 8.5 V or more.

Malfunction:

  1. No communication with power steering ECU (rack and pinion power steering gear assembly)

Detection Time:

  1. Continuously for 10 seconds or more
  • CAN communication system
  • Power steering ECU (rack and pinion power steering gear assembly)
  • Air conditioning amplifier assembly
 Memorized
U0140-87 Lost Communication with Body Control Module Missing Message Diagnosis Condition:
  1. IG voltage is 8.5 V or more.

Malfunction:

  1. No communication with main body ECU (multiplex network body ECU)

Detection Time:

  1. Continuously for 10 seconds or more
  • CAN communication system
  • Main body ECU (multiplex network body ECU)
  • Air conditioning amplifier assembly
 Memorized
U0155-87 Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message Diagnosis Condition:
  1. IG voltage is 8.5 V or more.

Malfunction:

  1. No communication with combination meter assembly

Detection Time:

  1. Continuously for 10 seconds or more
  • CAN communication system
  • Combination meter assembly
  • Air conditioning amplifier assembly
 Memorized
U0163-87 Lost Communication with Navigation Control Module Missing Message Diagnosis Condition:
  1. IG voltage is 8.5 V or more.

Malfunction:

  1. No communication with radio and display receiver assembly

Detection Time:

  1. Continuously for 10 seconds or more
  • CAN communication system
  • Radio and display receiver assembly
  • Air conditioning amplifier assembly
 Memorized
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