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Home >> Toyota >> 2024 >> Land Cruiser Base >> Repair and Diagnosis (Single Page) >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System - Diagnostic Codes (5 Of 5), Symptom Tests & Circuit Tests >> Electronically Controlled Brake System >> DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0101-87: Lost Communication with TCM Missing Message; DTC U0114-87: Lost Communication with Four-wheel Drive Clutch Control Module 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 U1107-87: Lost Communication with Power Management Module Missing Message; DTC U111A-87: Lost Communication with ECM/PCM "A" (ch2) Missing Message; DTC U1159-87: Lost Communication with Electronic Brake Booster Control Module "A" (ch3) Missing Message [02/2024 - ] >> Description
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DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0101-87: Lost Communication with TCM Missing Message; DTC U0114-87: Lost Communication with Four-wheel Drive Clutch Control Module 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 U1107-87: Lost Communication with Power Management Module Missing Message; DTC U111A-87: Lost Communication with ECM/PCM "A" (ch2) Missing Message; DTC U1159-87: Lost Communication with Electronic Brake Booster Control Module "A" (ch3) Missing Message [02/2024 - ]: 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 MIL DTC Output from Priority Note
U0100-87 Lost Communication with ECM/PCM "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)
 Comes on Brake/EPB B
  • SAE Code: U0100
  • Output ECU: No. 2 skid control ECU (brake actuator assembly)
U0101-87 Lost Communication with TCM Missing Message When data from the TCM cannot be received continuously for 2 seconds or more
  • CAN communication line
  • TCM
  • No. 2 skid control ECU (brake actuator assembly)
 Comes on Brake/EPB B
  • SAE Code: U0101
  • Output ECU: No. 2 skid control ECU (brake actuator assembly)
U0114-87 Lost Communication with Four-wheel Drive Clutch Control Module Missing Message When the +BS terminal voltage is between 9.5 and 17.4 V, data from the 4 wheel drive control ECU cannot be received for 1 second or more.
  • CAN communication line
  • 4 wheel drive control ECU
  • No. 2 skid control ECU (brake actuator assembly)
 Comes on Brake/EPB B
  • SAE Code: U0114
  • 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
  • Yaw rate and acceleration sensor (airbag ECU assembly)
  • No. 2 skid control ECU (brake actuator assembly)
 Comes on Brake/EPB B
  • SAE Code: U0125
  • 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)
 Does not come on 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)
 Does not come on 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)
 Does not come on 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)
 Does not come on 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)
 Comes on Brake/EPB B
  • SAE Code: U025E
  • 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)
 Comes on Brake/EPB B
  • SAE Code: U1107
  • Output ECU: No. 2 skid control ECU (brake actuator assembly)
U111A-87 Lost Communication with ECM/PCM "A" (ch2) 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)
 Comes on Brake/EPB B
  • SAE Code: U111A
  • 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)
 Does not come on Brake/EPB B Output ECU: No. 2 skid control ECU (brake actuator assembly)
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