Lexus ES: Lost Communication with ECM/PCM "A" Missing Message (U010087,U012587,U012687,U012987,U013187,U015587)
DESCRIPTION
When a communication malfunction is detected between the forward recognition camera and an ECU or sensor, a DTC is stored.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| U010087 | Lost Communication with ECM/PCM "A" Missing Message | 2 seconds after the engine switch is turned on (IG), while the vehicle is being driven at 5 km/h (4 mph) or more and the lane control system is on, a communication error is detected between the ECM and forward recognition camera for approximately 5 seconds or more. | CAN communication system |
| U012587 | Lost Communication with Multi-axis Acceleration Sensor Module Missing Message | While the vehicle is being driven at 5 km/h (4 mph) or more and the lane control system is on, a communication error is detected between the yaw rate sensor (airbag ECU assembly) and forward recognition camera for approximately 5 seconds or more. | CAN communication system |
| U012687 | Lost Communication with Steering Angle Sensor Module Missing Message | 2 seconds after the engine switch is turned on (IG), while the lane control system is on, a communication error is detected between the steering sensor and forward recognition camera for approximately 5 seconds or more. | CAN communication system |
| U012987 | Lost Communication with Brake System Control Module Missing Message | 2 seconds after the engine switch is turned on (IG), while the lane control system is on, a communication error is detected between the skid control ECU (brake actuator assembly) and forward recognition camera for approximately 5 seconds or more. | CAN communication system |
| U013187 | Lost Communication with Power Steering Control Module Missing Message | 2 seconds after the engine switch is turned on (IG), while the lane control system is on, a communication error is detected between the power steering ECU (rack and pinion power steering gear assembly) and forward recognition camera for approximately 5 seconds or more. | CAN communication system |
| U015587 | Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message | 2 seconds after the engine switch is turned on (IG), while the lane control system is on, a communication error is detected between the combination meter assembly and forward recognition camera for approximately 50 seconds or more. | CAN communication system |
PROCEDURE
| 1. | CHECK FOR DTCs |
(a) Clear the DTCs.
Chassis > Lane Control > 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 > Lane Control > Trouble Codes| Result | Proceed to |
|---|---|
| DTC U010087, U012587, U012687, U012987, U013187 and U015587 are not output | A |
| DTC U010087, U012587, U012687, U012987, U013187 or U015587 is output | B |
| A | .gif) | USE SIMULATION METHOD TO CHECK |
| B | | GO TO CAN COMMUNICATION SYSTEM |
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Installation
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Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.
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