DTC U116B-87: Lost Communication with Electric/Auxiliary Transmission Fluid Pump Missing Message [09/2023 - ]: Description
WARNING: This page is about a different car, the 2024 Lexus TX 500h. However, it is still accessible from the selected car via links, so may be relevant.
The TCM sends and receives data to and from the EOP ECU via local CAN communication.
When a communication malfunction occurs with the EOP ECU, the TCM outputs a DTC.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | DTC Output from | Priority | Note |
|---|---|---|---|---|---|---|---|
| U116B-87 | Lost Communication with Electric/Auxiliary Transmission Fluid Pump Missing Message | No communication between the TCM and EOP ECU for 1 second or more (1-trip detection logic). |
|
Comes on | Transmission | A | SAE: U116B |