Lexus ES: Lost Communication with ECM/PCM "A" Missing Message (U010087,U012587,U012687,U012987,U014087)
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 1 km/h or 1 mph or more, a communication error between the ECM and the forward recognition camera is detected for approximately 5 seconds or more. | CAN communication system |
| U012587 | Lost Communication with Multi-axis Acceleration Sensor Module Missing Message | 3 seconds after the engine switch is turned on (IG), while the vehicle is being driven at 1 km/h or 1 mph or more, a communication error between the yaw rate sensor (airbag ECU assembly) and the forward recognition camera is detected for approximately 5 seconds or more. | CAN communication system |
| U012687 | Lost Communication with Steering Angle Sensor Module Missing Message | 3 seconds after the engine switch is turned on (IG), a communication error between the steering sensor and the forward recognition camera is detected for approximately 5 seconds or more. | CAN communication system |
| U012987 | Lost Communication with Brake System Control Module Missing Message | 3 seconds 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 5 seconds or more. | CAN communication system |
| U014087 | Lost Communication with Body Control Module Missing Message | 3 seconds after the engine switch is turned on (IG), a communication error between the main body ECU (multiplex network body ECU) and the forward recognition camera is detected for approximately 5 seconds or more. | CAN communication system |
PROCEDURE
| 1. | CHECK FOR DTCs |
(a) Clear the DTCs.
Chassis > Front Recognition Camera > 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.
Chassis > Front Recognition Camera > Trouble Codes| Result | Proceed to |
|---|---|
| DTC U010087, U012587, U012687, U012987 and U014087 are not output | A |
| DTC U010087, U012587, U012687, U012987 or U014087 is output | B |
| A | .gif) | USE SIMULATION METHOD TO CHECK |
| B | | GO TO CAN COMMUNICATION SYSTEM |
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Internal Control Module Software Incompatibility Not Programmed (U030051)
DESCRIPTION The forward recognition camera receives vehicle information from the ECM via CAN communication. DTC U030051 is stored when the vehicle information from the ECM cannot be confirmed. DTC
Internal Control Module Software Incompatibility Invalid / Incompatible Software Component (U030057)
DESCRIPTION Forward recognition camera receives the vehicle information from the ECM via CAN communication. DTC U030057 is stored when the vehicle information from the ECM and that stored in the forwa
Software Incompatibility with Body Control Module Not Programmed (U032251)
DESCRIPTION The forward recognition camera receives vehicle information from the main body ECU (multiplex network body ECU) via CAN communication. DTC U032251 is stored when the forward recognition ca
SEE MORE:
Dtc Check / Clear
DTC CHECK / CLEAR CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Back Door / Trouble Codes. Body Electrical > Back Door > Trouble Codes (e) Check for DTCs. Click here CLEAR DTC (
Control Module Communication Bus Off (U0073,U0100,U0126,U0129)
DESCRIPTION The 4WD ECU assembly inputs the signals sent from the ECM, skid control ECU (brake actuator assembly) and steering sensor via CAN communication. When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding
