Lexus ES manuals

Lexus ES: System Description



(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

ESE (Engine Sound Enhancement) Function

Function that produces realistic engine sounds by adding frequency component sound according to driving conditions such as vehicle speed and accelerator pedal depression

Both of the following conditions are met:

  • Engine running, vehicle speed exceeding 0 km/h (0 mph)
  • Drivemode "Sport S+", "Sport S" or "Custom" (Power) is selected.


 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)

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


 Blind Spot Monitor Beam Axis Misalignment (C1AFA)

DESCRIPTION This DTC is stored when the clearance warning ECU assembly receives a signal from the blind spot monitor system via CAN communication indicating blind spot monitor beam axis misalignment. DTC No. Detection Item DTC Detection Condition Trouble Area C1AFA Blind Spot Monitor

 Cooling Fan Circuit

DESCRIPTION The ECM calculates an appropriate cooling fan speed based on the engine coolant temperature, air conditioning switch status, refrigerant pressure, engine speed and vehicle speed, and sends a signal to the cooling fan ECU (fan with motor assembly). The cooling fan ECU (fan with motor asse

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