DTC U111A-87: Lost Communication with ECM/PCM "A" (ch2) Missing Message; DTC U1154-87: Lost Communication with Drive Motor Control Module "A" (ch2) Missing Message; DTC U1170-87: Lost Communication with Brake System Control Module (ch2) Missing Message [12/2023 - ]: Description
WARNING: This page is about a different car, the 2024 Lexus TX 550h+. However, it is still accessible from the selected car via links, so may be relevant.
The hybrid vehicle control ECU assembly transmits and receives signals via CAN communication to and from the ECM, MG ECU and brake actuator assembly (No. 2 skid control ECU).
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate | DTC Output from | Priority | Note |
|---|---|---|---|---|---|---|---|---|
| U111A-87 | Lost Communication with ECM/PCM "A" (ch2) Missing Message | A CAN communication error between the ECM and hybrid vehicle control ECU assembly (CAN communication system malfunction) occurs (1 trip detection logic) |
CAN communication system | Comes on | Master Warning: Comes on |
Hybrid Control | B | SAE Code: U111A |
| U1154-87 | Lost Communication with Drive Motor Control Module "A" (ch2) Missing Message | A CAN communication error between the MG ECU and hybrid vehicle control ECU assembly (CAN communication system malfunction) occurs (1 trip detection logic) |
CAN communication system | Comes on | Master Warning: Comes on |
Hybrid Control | B | SAE Code: U1154 |
| U1170-87 | Lost Communication with Brake System Control Module (ch2) Missing Message | A CAN communication error between the brake actuator assembly (No. 2 skid control ECU) and hybrid vehicle control ECU assembly (CAN communication system malfunction) occurs (1 trip detection logic) |
CAN communication system | Comes on | Master Warning: Comes on |
Hybrid Control | B | SAE Code: U1170 |