DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module "A" Missing Message; DTC U0131-87: Lost Communication with Power Steering Control Module "A" Missing Message [10/2023 - ]: Description
WARNING: This page is about a different car, the 2024 Lexus LS 500. However, it is still accessible from the selected car via links, so may be relevant.
The object recognition camera communicates with each sensor and ECU via CAN communication.
If any malfunction is detected in a CAN communication circuit, one or more CAN communication system DTCs are stored.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | DTC Output from | Priority |
|---|---|---|---|---|---|
| U0100-87 | Lost Communication with ECM/PCM "A" Missing Message | After 3 seconds or more have elapsed since the ignition switch was turned to ON, there is a communication malfunction between the front side radar sensor (A) and ECM for approximately 11 seconds or more. | CAN communication system | Front Side Radar "A" | B |
| U0129-87 | Lost Communication with Brake System Control Module "A" Missing Message | After 3 seconds or more have elapsed since the ignition switch was turned to ON, there is a communication malfunction between the front side radar sensor (A) and No. 2 skid control ECU (brake actuator sub-assembly) for approximately 5 seconds or more. | CAN communication system | Front Side Radar "A" | B |
| U0131-87 | Lost Communication with Power Steering Control Module "A" Missing Message | After 3 seconds or more have elapsed since the ignition switch was turned to ON, there is a communication malfunction between the front side radar sensor (A) and power steering ECU (rack and pinion power steering gear assembly) for approximately 4 seconds or more. | CAN communication system | Front Side Radar "A" | B |