DTC B1497: Communication Malfunction (Bus Ic) [10/2018 - 10/2020]: Description
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus UX 250h, 2023 Lexus UX 250h, 2022 Lexus UX 250h, 2021 Lexus UX 250h, and 2020 Lexus UX 250h. However, it is still accessible from the selected car via links, so may be relevant.
The air conditioning harness assembly connects the air conditioning amplifier assembly and the servo motors. The air conditioning amplifier assembly supplies power and sends operation instructions to each servo motor through the air conditioning harness assembly. Each servo motor sends damper position information to the air conditioning amplifier assembly.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Memory |
|---|---|---|---|---|
| B1497 | Communication Malfunction (Bus Ic) |
|
|
Memorized (10 sec. or more)* |
- *: The air conditioning amplifier assembly stores this DTC if the malfunction has occurred for the period of time indicated in the brackets.
DTC Detection Conditions
| Vehicle Condition | |||
|---|---|---|---|
| Pattern 1 | Pattern 2 | ||
| Diagnosis Condition | Power switch on (IG) | ◦ | ◦ |
| Malfunction Status | Error in communication line | ◦ | - |
| Open in communication line | - | ◦ | |
| Detection Time | 10 sec. or more | 10 sec. or more | |
| Number of Trips | 1 trip | 1 trip | |
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.