DTC U0100: Lost Communication with ECM / PCM "A" [11/2021 - ]: Description
WARNING: This page is about a different car, the 2024 Lexus IS 500, 2023 Lexus IS 500, and 2022 Lexus IS 500. However, it is still accessible from the selected car via links, so may be relevant.
The ECM communicates with the TCM via the Controller Area Network (CAN).
If there is a problem in communication, the TCM stores this DTC.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
|---|---|---|---|---|---|
| U0100 | Lost Communication with ECM / PCM "A" | 1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other
|
|
Comes on | DTC stored |