Lexus NX: Lost Communication with Multi-axis Acceleration Sensor Module Missing Message (U012587,U012687,U012987,U014087,U029387)

Lexus NX Service Manual / Engine & Hybrid System / Cruise Control / Front Camera System / Lost Communication with Multi-axis Acceleration Sensor Module Missing Message (U012587,U012687,U012987,U014087,U029387)

DESCRIPTION

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

U012587

Lost Communication with Multi-axis Acceleration Sensor Module Missing Message

3 seconds after the power 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 airbag sensor assembly and the forward recognition camera is detected for approximately 5 seconds or more.

  • Airbag ECU assembly
  • CAN communication system
  • Forward recognition camera

U012687

Lost Communication with Steering Angle Sensor Module Missing Message

3 seconds after the power 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.

  • Steering sensor
  • CAN communication system
  • Forward recognition camera

U012987

Lost Communication with Brake System Control Module Missing Message

3 seconds after the power switch is turned on (IG), a communication error between the brake booster with master cylinder assembly (skid control ECU) and the forward recognition camera is detected for approximately 5 seconds or more.

  • Brake booster with master cylinder assembly (skid control ECU)
  • CAN communication system
  • Forward recognition camera

U014087

Lost Communication with Body Control Module Missing Message

3 seconds after the power switch is turned on (IG), a communication error between the main body ECU (multiplex network body ECU) and the front steering control ECU is detected for approximately 5 seconds or more.

  • Main body ECU (multiplex network body ECU)
  • CAN communication system
  • Forward recognition camera

U029387

Lost Communication with Hybrid Powertrain Control Module Missing Message

While the vehicle is being driven at 1 km/h or 1 mph or more, a communication error between the hybrid vehicle control ECU and the forward recognition camera is detected for approximately 5 seconds or more.

  • Hybrid vehicle control ECU
  • CAN communication system
  • Forward recognition camera

PROCEDURE

1.

CHECK FOR DTC

(a) Clear the DTCs.

Click here

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) Recheck for DTCs and check that no DTCs are output.

Click here

Chassis > Front Recognition Camera > Trouble Codes

OK:

DTCs U012587, U012687, U012987, U014087 and U029387 are not output.

OK

USE SIMULATION METHOD TO CHECK

NG

GO TO CAN COMMUNICATION SYSTEM

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DESCRIPTION The forward recognition camera receives vehicle information (Conv/HV) from the hybrid vehicle control ECU via the CAN communication line. When the forward recognition camera is unable

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DESCRIPTION The forward recognition camera receives vehicle specification information from the main body ECU (multiplex network body ECU) via the CAN communication line. When the forward recognition c

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DESCRIPTION The forward recognition camera receives vehicle specification information from the main body ECU (multiplex network body ECU) via the CAN communication line. When the value of the vehicle

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