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Home >> Toyota >> 2025 >> 4Runner TRD Pro >> Repair and Diagnosis (Single Page) >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System (HEV) - Diagnostic Codes (5 Of 5), Symptom Tests & Circuit Tests >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (except Gasoline Model) >> DTC U0100-00: Lost Communication with ECM/PCM "A"; DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0101-00: Lost Communication with TCM; 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 U0129-87: Lost Communication with Brake System Control Module "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 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 U1106-00: Lost Communication with Electric Parking Brake Module; DTC U1107-87: Lost Communication with Power Management Module Missing Message; DTC U111A-00: Lost Communication with ECM/PCM "A" (ch2); 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; DTC U117D-87: Lost Communication with Brake System Control Module (ch4) Missing Message [12/2024 - ] >> Monitor Strategy
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Monitor Strategy

U0100, U0101, U0114, U0125, U025E, U1107 AND U111A

Related DTCs U0100: Lost Communication with EFI (P-Bus)
U0101: Lost Communication with TCM (P-Bus)
U0114: Lost Communication with 4WD ECU
U0125: Lost communication with multi-axis acceleration sensor module
U025E: Lost communication with electronic brake booster control unit (C1-bus)
U1107: Lost communication with collation control module
U111A: Lost Communication with EFI (PL-Bus)
Required Sensors/Components(Main) No. 2 skid control ECU (brake actuator assembly)
Required Sensors/Components (Related No. 2 skid control ECU (brake actuator assembly)
Frequency of Operation Continuous
Duration 1 second: U0114 and U0125
2 seconds: U0100, U0101, U025E and U111A
3 seconds: U1107
MIL Operation Immediately
Sequence of Operation None
U0129 AND U117D

Related DTCs U0129: Lost communication with ECB_ECU (C1-bus)
U117D: Lost communication with ECB_ECU (PL-bus)
Required Sensors/Components(Main) No. 2 skid control ECU (brake actuator assembly)
Required Sensors/Components (Related No. 2 skid control ECU (brake actuator assembly)
Frequency of Operation Continuous
Duration 2 seconds
MIL Operation Immediately
Sequence of Operation None
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