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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 127 (Electronically Controlled Brake System (HV) - Diagnostic Codes (11 Of 11), Symptom Tests & Circuit Tests) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> DTC U0074-88: Control Module Communication Bus "B" Off Bus Off; DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0101-87: Lost Communication with TCM 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 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 U111A-87: Lost Communication with ECM/PCM "A" (ch2) 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 [12/2019 - 10/2021] >> Typical Enabling Conditions

Typical Enabling Conditions

WARNING: This page is about a different variant/trim than selected.
U0074 (CASE 1)

Monitor runs whenever the following DTCs are not stored C1241: Brake system voltage input out of range low
C137C: Brake system voltage input out of range low
C137D: Brake system voltage input out of range high
U0125: Lost communication with multi-axis acceleration sensor module
All of the following conditions are met A, B and C
A. Communication status with yaw rate sensor Valid
B. +BS voltage Higher than 9.5 V, and less than 17.4 V
C. Following condition is met 3 seconds or more
IG1 voltage Higher than 10 V
U0074 (CASE 2)

Monitor runs whenever the following DTCs are not stored C1241: Brake system voltage input out of range low
C137C: Brake system voltage input out of range low
C137D: Brake system voltage input out of range high
All of the following conditions are met A, B and C
A. Communication status with steering angle sensor Valid
B. +BS voltage Higher than 9.5 V, and less than 17.4 V
C. Following condition is met 3 seconds or more
IG1 voltage Higher than 10 V
U0100, U0110, U0293, U111A AND U1150

Monitor runs whenever the following DTCs are not stored C123E: Brake system voltage input open circuit
C137C: Brake system voltage input out of range low
C137D: Brake system voltage input out of range high
Both of the following conditions are met A and B
A. +BS voltage Higher than 9.5 V, and less than 17.4 V
B. Following condition is met 3 seconds or more
IG2 voltage Higher than 10 V
U0125, U025E AND U1107

Monitor runs whenever the following DTCs are not stored C1241: Brake system voltage input out of range low
C137C: Brake system voltage input out of range low
C137D: Brake system voltage input out of range high
Both of the following conditions are met A and B
A. +BS voltage Higher than 9.5 V, and less than 17.4 V
B. Following condition is met 3 seconds or more
IG1 voltage Higher than 10 V
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