DTC U1157-87: Lost Communication with Drive Motor Control Module "A" (ch3) 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 exchanges CAN communication signals with the motor generator control ECU (MG ECU) via CAN communication (HV local bus).
The following ECUs are connected to the HV local bus.
- Hybrid vehicle control ECU assembly
- Motor generator control ECU (MG ECU)
- Rear motor generator control ECU (RMG ECU)
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate | DTC Output from | Priority | Note |
|---|---|---|---|---|---|---|---|---|
| U1157-87 | Lost Communication with Drive Motor Control Module "A" (ch3) Missing Message | A CAN communication error between the hybrid vehicle control ECU assembly and motor generator control ECU (MG ECU) (CAN communication system (HV local bus) malfunction) occurs. (1 trip detection logic). |
|
Comes on | Master Warning: Comes on |
Hybrid Control | B | SAE Code: U1157 |