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Home >> Lexus >> 2023 >> NX 250 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 54 (Electronically Controlled Brake System - Diagnostic Codes (6 Of 6), Symptom Tests & Circuit Tests) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HEV Model) >> DTC U0110-00: Lost Communication with Drive Motor Control Module "A"; DTC U0129-87: Lost Communication with Brake System Control Module "A" Missing Message; DTC U0293-00: Lost Communication with Hybrid/EV Powertrain Control Module; DTC U1106-00: Lost Communication with Electric Parking Brake Module; DTC U1150-00: Lost Communication with Hybrid Powertrain Control Module (ch2); DTC U117D-87: Lost Communication with Brake System Control Module (ch4) Missing Message; DTC U1492-57: Software incompatibility with Hybrid/EV Powertrain Control Module Invalid/Incompatible Software Component [11/2021 - ] >> Typical Enabling Conditions

Typical Enabling Conditions

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U0110 (CASE 2)

Monitor runs whenever the following DTCs are not stored C1021 (Case 2 and 3): Brake system voltage input open circuit
C14C7 (Case 1): Brake system voltage circuit low
C14C8: Brake system voltage circuit high
P2531: Brake system voltage input open circuit
U0293: Lost communication with HEV (C1-Bus)
All of the following conditions are met -
IGP PT2 (CAN data) On
VM1 voltage Higher than 7.3 V, and less than 23.2 V
IGR voltage Higher than 9.5 V
U0129 AND U117D

Monitor runs whenever the following DTCs are not stored C1021 (Case 2 and 3): 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
U0293 (CASE 2)

Monitor runs whenever the following DTCs are not stored C1021 (Case 2 and 3): 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
P2531: Brake system voltage input open circuit
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
U1150 (CASE 2)

Monitor runs whenever the following DTCs are not stored C1021 (Case 2 and 3): 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
P2531: Brake system voltage input open circuit
U0293: Lost communication with HEV (C1-Bus)
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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