Lexus ES manuals

Lexus ES: System Description

SYSTEM DESCRIPTION

ACTIVE NOISE CONTROL SYSTEM

(a) The active noise control system is a system that detects muffled engine sounds produced in sync that fluctuates according to the engine speed, by using the active noise control microphone and outputs anti-phase control sound through the audio speakers to reduce muffled engine sounds.

The active noise control system includes the following functions.

Function Name

Function Description

Operation Conditions

ANC (Active Noise Control) Function

Function that reduces noise by using anti-phase and vibration control sound to interfere with muffled sounds

Engine running

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 System Diagram

SYSTEM DIAGRAM

 Terminals Of Ecu

TERMINALS OF ECU STEREO COMPONENT EQUALIZER ASSEMBLY Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition G15-1 (CANH) P CAN communication signal

 Lost Communication With ECM/PCM "A" Missing Message (U010087,U012987,U014087,U016487,U029387,U115187)

DESCRIPTION These DTCs are stored when a malfunction occurs in the CAN communication circuit. DTC No. Detection Item DTC Detection Condition Trouble Area U010087 Lost Communication With

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 Transmitter ID 1 not Received (Main) (C2121-C2124,C2181-C2184)

DESCRIPTION The tire pressure warning valve and transmitters that are installed in the tire and wheel assemblies measure the tire pressure of each wheel. The measured values are transmitted to the tire pressure warning ECU and receiver in the vehicle as radio waves. The ECU compares the measured tir

 Remote Service Malfunction

PROCEDURE 1. CHECK CAN COMMUNICATION SYSTEM (a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Bus Check. Click here (e) Check that all ECUs and sensors that use CAN communication are connected. Result

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