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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 - ] >> Description

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 - ]: Description

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The No. 1 skid control ECU (brake booster with master cylinder assembly) receives signals from the hybrid vehicle control ECU, inverter with converter assembly and No. 2 skid control ECU (brake actuator assembly) via CAN communication.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL DTC Output from Note
U0110-00 Lost Communication with Drive Motor Control Module "A" When terminal IG2 voltage is 9.5 V or more, data from the inverter with converter assembly cannot be received for 2 seconds or more.
  • CAN communication line
  • Inverter with converter assembly
  • No. 1 skid control ECU (brake booster with master cylinder assembly)
 Comes on Brake/EPB
  • SAE Code: U0110 (Case 2)
  • Output ECU: Both skid control ECUs
U0129-87 Lost Communication with Brake System Control Module "A" Missing Message When the voltage at terminal IG1 is 9.5 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. 2 skid control ECU (brake actuator assembly)
  • No. 1 skid control ECU (brake booster with master cylinder assembly)
 Comes on Brake/EPB
  • SAE Code: U0129
  • Output ECU: Both skid control ECUs
U0293-00 Lost Communication with Hybrid/EV Powertrain Control Module When terminal IG2 voltage is 9.5 V or more, data from the hybrid vehicle control ECU cannot be received for 2 seconds or more.
  • CAN communication line
  • Hybrid vehicle control ECU
  • No. 1 skid control ECU (brake booster with master cylinder assembly)
 Comes on Brake/EPB
  • SAE Code: U0293 (Case 2)
  • Output ECU: Both skid control ECUs
U1106-00 Lost Communication with Electric Parking Brake Module With terminal IG1 voltage at 9.5 V or more, data cannot be received from the No. 2 skid control ECU (brake actuator assembly) for 1 second or more.
  • CAN communication line
  • No. 2 skid control ECU (brake actuator assembly)
  • No. 1 skid control ECU (brake booster with master cylinder assembly)
 Does not come on Brake Booster Output ECU: No. 1 skid control ECU (brake booster with master cylinder assembly)
U1150-00 Lost Communication with Hybrid Powertrain Control Module (ch2) When terminal IG2 voltage is 9.5 V or more, data from the hybrid vehicle control ECU cannot be received for 2 seconds or more.
  • CAN communication line
  • Hybrid vehicle control ECU
  • No. 1 skid control ECU (brake booster with master cylinder assembly)
 Comes on Brake/EPB
  • SAE Code: U1150 (Case 2)
  • Output ECU: Both skid control ECUs
U117D-87 Lost Communication with Brake System Control Module (ch4) Missing Message When the voltage at terminal IG1 is 9.5 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. 2 skid control ECU (brake actuator assembly)
  • No. 1 skid control ECU (brake booster with master cylinder assembly)
 Comes on Brake/EPB
  • SAE Code: U117D
  • Output ECU: Both skid control ECUs
U1492-57 Software incompatibility with Hybrid/EV Powertrain Control Module Invalid/Incompatible Software Component Either of the following is detected:
  • The engine type, powertrain variation and destination information sent from the hybrid vehicle control ECU do not match the information stored in the No. 1 skid control ECU (brake booster with master cylinder assembly).
  • No system information stored in the No. 1 skid control ECU (brake booster with master cylinder assembly).
  • CAN communication line
  • Hybrid vehicle control ECU
  • No. 1 skid control ECU (brake booster with master cylinder assembly)
 Does not come on Brake Booster Output ECU: No. 1 skid control ECU (brake booster with master cylinder assembly)
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