LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2021 >> RAV4 LE, AWD >> Repair and Diagnosis (Single Page) >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System (W/O Vacuum Brake Booster) - Diagnostic Codes (8 Of 8) & Symptom Tests >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster) >> 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 [12/2021 - ] >> Description
April 5, 2026: LEMON Manuals is launched! Read the announcement.

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 [12/2021 - ]: Description

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 Note
U0110-00 Lost Communication with Drive Motor Control Module "A" When terminal IG1 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
  • 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
  • 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
  • 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 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
  • 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
  • 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 Output ECU: No. 1 skid control ECU (brake booster with master cylinder assembly)
U1492-57 DTC DETECTION CONDITIONS

  Vehicle Condition
Pattern 1 Pattern 2
Diagnosis Condition - - -
Malfunction Status 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) - ◦
Detection Time - -
Number of Trips 1 trip 1 trip

HINT: 

DTC will be output when conditions for either of the patterns in the table above are met.

scientia non olet · About LEMON Manuals