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Home >> Toyota >> 2024 >> Land Cruiser First Edition >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System - Diagnostic Codes (5 Of 5), Symptom Tests & Circuit Tests >> Electronically Controlled Brake System >> DTC U0100-00: Lost Communication with ECM/PCM "A"; DTC U0101-00: Lost Communication with TCM; DTC U0129-87: Lost Communication with Brake System Control Module "A" Missing Message; DTC U1106-00: Lost Communication with Electric Parking Brake Module; DTC U111A-00: Lost Communication with ECM/PCM "A" (ch2); DTC U117D-87: Lost Communication with Brake System Control Module (ch4) Missing Message [02/2024 - ] >> Typical Enabling Conditions

Typical Enabling Conditions

U0129 AND U117D

Monitor runs whenever the following DTCs are not stored C1021 (Case 2): Brake system voltage input open circuit
C137C: Brake system voltage input out of range low
C137D: Brake system voltage input out of range high
C14C7 (Case 1): Brake system voltage circuit low
C14C8: Brake system voltage circuit high
Both of the following conditions are met -
VM1 voltage Higher than 7.3 V, and less than 23.2 V
IGR voltage Higher than 9.5 V
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