Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Lost Communication with ECM/PCM "A" Missing Message (U010087,U012587,U012687,U012987)
DESCRIPTION
When a malfunction is detected between various ECUs and sensors, these DTCs are stored.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| U010087 | Lost Communication with ECM/PCM "A" Missing Message | While the vehicle is being driven at 5 km/h (4 mph) or more, a communication error between the ECM and the forward recognition camera is detected for approximately 6 seconds or more. | CAN communication system |
| U012587 | Lost Communication with Multi-axis Acceleration Sensor Module Missing Message |
| CAN communication system |
| U012687 | Lost Communication with Steering Angle Sensor Module Missing Message | 3 seconds or more after the engine switch is turned on (IG), a communication error between the steering sensor and the forward recognition camera is detected for approximately 1 second or more. | CAN communication system |
| U012987 | Lost Communication with Brake System Control Module Missing Message | 3 seconds or more after the engine switch is turned on (IG), a communication error between the skid control ECU (brake actuator assembly) and the forward recognition camera is detected for approximately 1 second or more. | CAN communication system |
PROCEDURE
| 1. | CHECK FOR DTCs |
(a) Clear the DTCs.
Body Electrical > Pre-Collision System > Clear DTCs(b) Make sure that the DTC detection conditions are met.
HINT:
If the detection conditions are not met, the system cannot detect the malfunction.
(c) Check for DTCs.
Body Electrical > Pre-Collision System > Trouble Codes| Result | Proceed to |
|---|---|
| DTC U010087, U012587, U012687 and U012987 are not output | A |
| DTC U010087, U012587, U012687 or U012987 is output | B |
| A | .gif) | USE SIMULATION METHOD TO CHECK |
| B | | GO TO CAN COMMUNICATION SYSTEM |
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Lost Communication with Cruise Control Front Distance Range Sensor Missing Message (U023587)
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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