DTC U0100-87: Lost Communication With ECM/PCM "A" Missing Message; DTC U0293-87: Lost Communication With Hybrid Powertrain Control Module Missing Message; DTC U1170-08: Lost Communication with Brake System Control Module (ch2) Bus Signal / Message Failure; DTC U1170-87: Lost Communication With Brake System Control Module (ch2) Missing Message [11/2023 - ]: Description
WARNING: This page is about a different car, the 2025 Toyota Highlander and 2024 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
The motor generator control ECU communicates with the hybrid vehicle control ECU assembly, ECM and skid control ECU assembly via CAN communication.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Warning Indicate | Note |
|---|---|---|---|---|---|---|
| U0100-87 | Lost Communication With ECM/PCM "A" Missing Message | A CAN communication error between the ECM and motor generator control ECU (CAN communication system malfunction) occurs (1 trip detection logic) |
CAN communication system | Comes on | Master Warning: Comes on |
SAE Code: U0100 |
| U0293-87 | Lost Communication With Hybrid Powertrain Control Module Missing Message | A CAN communication error between the hybrid vehicle control ECU assembly and motor generator control ECU (CAN communication system malfunction) occurs (1 trip detection logic) |
CAN communication system | Comes on | Master Warning: Comes on |
SAE Code: U0293 |
| U1170-08 | Lost Communication with Brake System Control Module (ch2) Bus Signal / Message Failure | A CAN communication error between the skid control ECU assembly and motor generator control ECU (CAN communication system malfunction) occurs (1 trip detection logic) |
CAN communication system | Does not come on | Master Warning: Comes on |
SAE Code: U1170 |
| U1170-87 | Lost Communication With Brake System Control Module (ch2) Missing Message | A CAN communication error between the skid control ECU assembly and motor generator control ECU (CAN communication system malfunction) occurs (1 trip detection logic) |
CAN communication system | Comes on | Master Warning: Comes on |
SAE Code: U1170 |