Lexus ES: Lost Communication with Multi-axis Acceleration Sensor Module Missing Message (U012587,U012687,U012987,U013187,U015587,U029387)
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 |
|---|---|---|---|
| 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 power 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 power switch is turned on (IG), while the lane control system is on, a communication error is detected between the skid control ECU (brake booster with master cylinder 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 power 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 power 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 |
| U029387 | Lost Communication with Hybrid Powertrain Control Module Missing Message | 2 seconds after the power 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 hybrid vehicle control ECU and forward recognition camera for approximately 5 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 U012587, U012687, U012987, U013187, U015587 and U029387 are not output | A |
| DTC U012587, U012687, U012987, U013187, U015587 or U029387 is output | B |
| A | .gif) | USE SIMULATION METHOD TO CHECK |
| B | | GO TO CAN COMMUNICATION SYSTEM |
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SEE MORE:
Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST NOTICE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not. HINT: Using the Techstream to read the Data List allows the values or states of
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
*: Use the Techstream
Use the following procedure to troubleshoot the motor generator control system.
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
NEXT 2. CUSTOMER PROBLEM ANALYSIS
NEXT 3. CONNECT TECHSTREAM
