Lexus ES manuals

Lexus ES: Lost Communication with ECM/PCM "A" Missing Message (U010087,U012587,U012687,U012987,U015587,U110687)

Lexus ES (XZ10) Service Manual / Engine & Hybrid System / Cruise Control / Dynamic Radar Cruise Control System (for Gasoline Model) / Lost Communication with ECM/PCM "A" Missing Message (U010087,U012587,U012687,U012987,U015587,U110687)

DESCRIPTION

The forward recognition camera communicates with each sensor and ECU via CAN communication.

If any malfunction is detected in a CAN communication circuit, one or more CAN communication system DTCs are stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

DTC Output from

U010087

Lost Communication with ECM/PCM "A" Missing Message

When the dynamic radar cruise control system is operating, a communication malfunction between the ECM and forward recognition camera is detected for 5 seconds or more.

  • CAN communication system
  • ECM
  • Forward recognition camera

Does not come on

Forward recognition camera

U012587

Lost Communication with Multi-axis Acceleration Sensor Module Missing Message

When the vehicle speed is 1 km/h or more, a communication error between the forward recognition camera and yaw rate and acceleration sensor (airbag ECU assembly) continues for 5 seconds or more.

  • CAN communication system
  • Yaw rate and acceleration sensor (Airbag ECU assembly)
  • Forward recognition camera

Does not come on

Forward recognition camera

U012687

Lost Communication with Steering Angle Sensor Module Missing Message

When the engine switch is on (IG) for 2 seconds or more, a communication error between the forward recognition camera and steering sensor continues for 5 seconds or more.

  • CAN communication system
  • Steering sensor
  • Forward recognition camera

Does not come on

Forward recognition camera

U012987

Lost Communication with Brake System Control Module Missing Message

When the engine switch is on (IG) for 2 seconds or more, a communication error between the forward recognition camera and skid control ECU (brake actuator assembly) continues for 5 seconds or more.

  • CAN communication system
  • Skid control ECU (Brake actuator assembly)
  • Forward recognition camera

Does not come on

Forward recognition camera

U015587

Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message

When the engine switch is on (IG) for 2 seconds or more, a communication error between the forward recognition camera and combination meter assembly continues for 50 seconds or more.

  • CAN communication system
  • Combination meter assembly
  • Forward recognition camera

Does not come on

Forward recognition camera

U110687

Lost Communication with Electric Parking Brake Module Missing Message

When the engine switch is on (IG) for 2 seconds or more, a communication error between the forward recognition camera and skid control ECU (brake actuator assembly) continues for 5 seconds or more.

  • CAN communication system
  • Skid control ECU (Brake actuator assembly)
  • Forward recognition camera

Does not come on

Forward recognition camera

PROCEDURE

1.

CHECK FOR DTCs

(a) Clear the DTCs.

Powertrain > Radar Cruise2 > 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.

Powertrain > Radar Cruise2 > Trouble Codes

Result

Proceed to

DTC U010087, U012587, U012687, U012987, U015587 and U110687 are not output

A

DTC U010087, U012587, U012687, U012987, U015587 or U110687 is output

B

A

USE SIMULATION METHOD TO CHECK

B

GO TO CAN COMMUNICATION SYSTEM

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