Lexus ES manuals

Lexus ES: Front Left Microphone Circuit Component Internal Failure (B1AA296,B1AA31C)

Lexus ES (XZ10) Service Manual / Audio & Visual & Telematics / Audio / Video / Active Noise Control System(for Hv Model) / Front Left Microphone Circuit Component Internal Failure (B1AA296,B1AA31C)

DESCRIPTION

These DTCs are stored when a malfunction occurs in the No. 1 active noise control microphone system.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B1AA296

Front Left Microphone Circuit Component Internal Failure

Stereo component equalizer assembly detects malfunction in No. 1 active noise control microphone for 4 seconds or more continuously when engine speed is 1200 rpm or more*

  • Harness or connector
  • No. 1 active noise control microphone
  • Stereo component equalizer assembly

B1AA31C

Front Left Microphone Circuit Circuit Voltage Out of Range

Stereo component equalizer assembly detects No. 1 active noise control microphone connection malfunction for 4 seconds or more continuously*

  • Harness or connector
  • No. 1 active noise control microphone
  • Stereo component equalizer assembly

HINT:

*: Malfunction monitoring is not performed under the following conditions, in order to prevent erroneous detection.

  • After power switch is turned on (ACC) for 3 seconds or more.
  • After the auxiliary battery voltage returns to normal for 3 seconds.
  • Before 3 seconds have elapsed after auxiliary battery voltage has returned to normal.

WIRING DIAGRAM

PROCEDURE

1.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Active Noise Control > Clear DTCs
NEXT

2.

CHECK FOR DTC

(a) Check for DTCs with all of the detection conditions met.

Body Electrical > Active Noise Control > Trouble Codes

OK:

No DTCs are output.

OK

USE SIMULATION METHOD TO CHECK

NG

3.

CHECK HARNESS AND CONNECTOR (STEREO COMPONENT EQUALIZER ASSEMBLY - NO. 1 ACTIVE NOISE CONTROL MICROPHONE)

(a) Disconnect the G15 stereo component equalizer assembly connector.

(b) Disconnect the P15 No. 1 active noise control microphone connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

G15-7 (MC1+) - P15-1 (MC1+)

Always

Below 1 Ω

G15-21 (MC1-) - P15-2 (MC1-)

Always

Below 1 Ω

G15-7 (MC1+) or P15-1 (MC1+) - Body ground

Always

10 kΩ or higher

G15-21 (MC1-) or P15-2 (MC1-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

REPLACE NO. 1 ACTIVE NOISE CONTROL MICROPHONE

(a) Replace the No. 1 active noise control microphone with a new or known good one.

Click here

NEXT

5.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Active Noise Control > Clear DTCs
NEXT

6.

CHECK FOR DTC

(a) Check for DTCs with all of the detection conditions met.

Body Electrical > Active Noise Control > Trouble Codes

OK:

No DTCs are output.

OK

END (NO. 1 ACTIVE NOISE CONTROL MICROPHONE IS DEFECTIVE)

NG

REPLACE STEREO COMPONENT EQUALIZER ASSEMBLY

READ NEXT:

 Front Right Microphone Circuit Component Internal Failure (B1AA696,B1AA71C)

DESCRIPTION These DTCs are stored when a malfunction occurs in the No. 2 active noise control microphone system. DTC No. Detection Item DTC Detection Condition Trouble Area B1AA696 Fron

 Rear Center Microphone Circuit Component Internal Failure (B1AAA96,B1AAB1C)

DESCRIPTION These DTCs are stored when a malfunction occurs in the No. 3 active noise control microphone system. DTC No. Detection Item DTC Detection Condition Trouble Area B1AAA96 Rear

 Data List / Active Test

DATA LIST / ACTIVE TEST DATA LIST NOTICE: In the following table, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether

SEE MORE:

 Components

COMPONENTS ILLUSTRATION *1 NO. 2 PARKING BRAKE WIRE ASSEMBLY *2 REAR AXLE HUB AND BEARING ASSEMBLY *3 REAR DISC *4 REAR DISC BRAKE CALIPER ASSEMBLY *5 REAR FLEXIBLE HOSE *6 REAR DISC BRAKE DUST COVER SUB-ASSEMBLY Tightening torque for "Major areas involving basic

 Problem Symptoms Table

PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspect

© 2016-2024 Copyright www.lexguide.net