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Home >> Toyota >> 2025 >> Prius LE >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heating / Air Conditioning System (HEV) - Diagnostic Codes (2 Of 2), Circuit Tests & Symptom Tests >> AIR CONDITIONING SYSTEM (for HEV 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; DTC U0198-87: Lost Communication with Telematic Control Module "A" Missing Message; DTC U0293-87: Lost Communication with Hybrid Powertrain Control Module Missing Message [12/2022 - ] >> Description
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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; DTC U0198-87: Lost Communication with Telematic Control Module "A" Missing Message; DTC U0293-87: Lost Communication with Hybrid Powertrain Control Module Missing Message [12/2022 - ]: Description

DTC No. Detection Item DTC Detection Condition Trouble Area Memory DTC Output from Priority
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 Air Conditioner B
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 assembly

Detection Time:

  1. Continuously for 10 seconds or more
  • CAN communication system
  • Power steering ECU assembly
  • Air conditioning amplifier assembly
 Memorized Air Conditioner B
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 Air Conditioner B
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 Air Conditioner B
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 Air Conditioner B
U0198-87 Lost Communication with Telematic Control Module "A" Missing Message Diagnosis Condition:
  1. IG voltage 8.5 V or higher

Malfunction Status:

  1. No communication with DCM (telematics transceiver)

Detection Time:

  1. Continuously for 10 seconds or more
  • CAN communication system
  • DCM (telematics transceiver)
  • Air conditioning amplifier assembly
 Memorized Air Conditioner B
U0293-87 Lost Communication with Hybrid Powertrain Control Module Missing Message Diagnosis Condition:
  1. IG voltage is 8.5 V or more.

Malfunction:

  1. No communication with hybrid vehicle control ECU

Detection Time:

  1. Continuously for 10 seconds or more
  • CAN communication system
  • Hybrid vehicle control ECU
  • Air conditioning amplifier assembly
 Memorized Air Conditioner B
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