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Home >> Toyota >> 2021 >> Mirai Limited >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System - Diagnostic Codes (4 Of 4), Circuit Tests, Symptom Tests >> Electronically Controlled Brake System >> DTC U0103-87: Lost Communication with Gear Shift Control Module "A" Missing Message; DTC U0110-87: Lost Communication with Drive Motor Control Module "A" Missing Message; DTC U0125-87: Lost Communication with Multi-axis Acceleration Sensor Module Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module 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 U0151-87: Lost Communication with Restraints Control Module Missing Message; DTC U025E-87: Lost Communication with Electronic Brake Booster Control Module "A" Missing Message; DTC U0293-87: Lost Communication with Hybrid/EV Powertrain Control Module Missing Message; DTC U1107-87: Lost Communication with Power Management Module Missing Message; DTC U1150-87: Lost Communication with Hybrid Powertrain Control Module (ch2) Missing Message; DTC U1159-87: Lost Communication with Electronic Brake Booster Control Module "A" (ch3) Missing Message; DTC U1308-57: Software Incompatibility with Pre-collision Control Module Invalid / Incompatible Software Component [12/2023 - ] >> Description

DTC U0103-87: Lost Communication with Gear Shift Control Module "A" Missing Message; DTC U0110-87: Lost Communication with Drive Motor Control Module "A" Missing Message; DTC U0125-87: Lost Communication with Multi-axis Acceleration Sensor Module Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module 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 U0151-87: Lost Communication with Restraints Control Module Missing Message; DTC U025E-87: Lost Communication with Electronic Brake Booster Control Module "A" Missing Message; DTC U0293-87: Lost Communication with Hybrid/EV Powertrain Control Module Missing Message; DTC U1107-87: Lost Communication with Power Management Module Missing Message; DTC U1150-87: Lost Communication with Hybrid Powertrain Control Module (ch2) Missing Message; DTC U1159-87: Lost Communication with Electronic Brake Booster Control Module "A" (ch3) Missing Message; DTC U1308-57: Software Incompatibility with Pre-collision Control Module Invalid / Incompatible Software Component [12/2023 - ]: Description

The following DTCs are output when there is a communication malfunction between a sensor or ECU.

DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from Priority Note
U0103-87 Lost Communication with Gear Shift Control Module "A" Missing Message When terminal IG2 voltage is 10 V or more, data cannot be received from the ECM for 2 seconds or more.
  • CAN communication line
  • ECM
  • No. 2 skid control ECU (brake actuator assembly)
 Brake/EPB B Output ECU: No. 2 skid control ECU (brake actuator assembly)
U0110-87 Lost Communication with Drive Motor Control Module "A" Missing Message When terminal IG1 voltage is 10 V or more and IGP_PT2 signal is on, data cannot be received from the inverter with converter assembly for 2 seconds or more.
  • CAN communication line
  • Inverter with converter assembly
  • No. 2 skid control ECU (brake actuator assembly)
 Brake/EPB B Output ECU: No. 2 skid control ECU (brake actuator assembly)
U0125-87 Lost Communication with Multi-axis Acceleration Sensor Module Missing Message When the +BS terminal voltage is between 9.5 and 17.4 V, data from the acceleration sensor cannot be received for 1 second or more.
  • CAN communication line
  • Acceleration sensor (airbag ECU assembly)
  • No. 2 skid control ECU (brake actuator assembly)
 Brake/EPB B Output ECU: No. 2 skid control ECU (brake actuator assembly)
U0126-87 Lost Communication with Steering Angle Sensor Module Missing Message When the +BS terminal voltage is between 9.5 and 17.4 V, data from the steering sensor cannot be received for 1 second or more.
  • CAN communication line
  • Steering sensor
  • No. 2 skid control ECU (brake actuator assembly)
 Brake/EPB B Output ECU: No. 2 skid control ECU (brake actuator assembly)
U0131-87 Lost Communication with Power Steering Control Module Missing Message When the voltage at terminal +BS is 9.5 to 17.4 V, data from the power steering ECU (rack and pinion power steering gear assembly) cannot be received for 1 second or more.
  • CAN communication line
  • Power steering ECU (rack and pinion power steering gear assembly)
  • No. 2 skid control ECU (brake actuator assembly)
 Brake/EPB B Output ECU: No. 2 skid control ECU (brake actuator assembly)
U0140-87 Lost Communication with Body Control Module Missing Message When the voltage at terminal IG1 is 10 V or more, data from the main body ECU (multiplex network body ECU) cannot be received for 2 seconds or more.
  • CAN communication line
  • Main body ECU (multiplex network body ECU)
  • No. 2 skid control ECU (brake actuator assembly)
 Brake/EPB B Output ECU: No. 2 skid control ECU (brake actuator assembly)
U0151-87 Lost Communication with Restraints Control Module Missing Message When the +BS terminal voltage is between 9.5 and 17.4 V and the vehicle speed exceeds 7 km/h (4 mph), data cannot be received from the airbag ECU assembly for 5 seconds or more.
  • CAN communication line
  • Airbag ECU assembly
  • No. 2 skid control ECU (brake actuator assembly)
 Brake/EPB B Output ECU: No. 2 skid control ECU (brake actuator assembly)
U025E-87 Lost Communication with Electronic Brake Booster Control Module "A" Missing Message When the voltage at terminal IG1 is 10 V or more, communication between the No. 1 skid control ECU (brake booster with master cylinder assembly) and No. 2 skid control ECU (brake actuator assembly) is not possible for 2 seconds or more.
  • CAN communication line
  • No. 1 skid control ECU (brake booster with master cylinder assembly)
  • No. 2 skid control ECU (brake actuator assembly)
 Brake/EPB B Output ECU: No. 2 skid control ECU (brake actuator assembly)
U0293-87 Lost Communication with Hybrid/EV Powertrain Control Module Missing Message When terminal IG1 voltage is 10 V or more and IGP_PT2 signal is on, data from the EV control ECU cannot be received for 2 seconds or more.
  • CAN communication line
  • EV control ECU
  • No. 2 skid control ECU (brake actuator assembly)
 Brake/EPB B Output ECU: No. 2 skid control ECU (brake actuator assembly)
U1107-87 Lost Communication with Power Management Module Missing Message When the voltage at terminal IG1 is 10 V or more, the certification ECU (smart key ECU assembly) cannot communicate for 3 seconds or more.
  • CAN communication line
  • Certification ECU (smart key ECU assembly)
  • No. 2 skid control ECU (brake actuator assembly)
 Brake/EPB B Output ECU: No. 2 skid control ECU (brake actuator assembly)
U1150-87 Lost Communication with Hybrid Powertrain Control Module (ch2) Missing Message When terminal IG1 voltage is 10 V or more and IGP_PT2 signal is on, data from the EV control ECU cannot be received for 2 seconds or more.
  • CAN communication line
  • EV control ECU
  • No. 2 skid control ECU (brake actuator assembly)
 Brake/EPB B Output ECU: No. 2 skid control ECU (brake actuator assembly)
U1159-87 Lost Communication with Electronic Brake Booster Control Module "A" (ch3) Missing Message When the voltage at terminal IG1 is 10 V or more, communication between the No. 1 skid control ECU (brake booster with master cylinder assembly) and No. 2 skid control ECU (brake actuator assembly) is not possible for 2 seconds or more.
  • CAN communication line
  • No. 1 skid control ECU (brake booster with master cylinder assembly)
  • No. 2 skid control ECU (brake actuator assembly)
 Brake/EPB B Output ECU: No. 2 skid control ECU (brake actuator assembly)
U1308-57 Software Incompatibility with Pre-collision Control Module Invalid / Incompatible Software Component Either of the following is detected:
  • The variation and destination information sent from the forward recognition camera do not match the information stored in the No. 2 skid control ECU (brake actuator assembly).*1
  • The variation and destination information sent from the object recognition camera do not match the information stored in the No. 2 skid control ECU (brake actuator assembly).*2
  • No system information stored in the No. 2 skid control ECU (brake actuator assembly).
  • CAN communication line
  • Forward recognition camera*1
  • Object recognition camera*2
  • No. 1 skid control ECU (brake booster with master cylinder assembly)
 Brake/EPB B Output ECU: No. 2 skid control ECU (brake actuator assembly)
  1. *1: Mono Camera Type
  2. *2: Stereo Camera Type
U1308-57 DTC DETECTION CONDITIONS

  Vehicle Condition
Pattern 1 Pattern 2 Pattern 3
Diagnosis Condition - - - -
Malfunction Status The variation and destination information sent from the forward recognition camera do not match the information stored in the No. 2 skid control ECU (brake actuator assembly)*1 ◦ - -
The variation and destination information sent from the object recognition camera do not match the information stored in the No. 2 skid control ECU (brake actuator assembly)*2 - ◦ -
No system information stored in the No. 2 skid control ECU (brake actuator assembly) - - ◦
Detection Time - - -
Number of Trips 1 trip 1 trip 1 trip
  1. *1: Mono Camera Type
  2. *2: Stereo Camera Type

HINT: 

DTC will be output when conditions for either of the patterns in the table above are met.

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