Lexus ES manuals

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

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

Stereo component equalizer assembly detects malfunction in No. 3 active noise control microphone for 4 seconds or more continuously when engine speed is 1200 rpm or more*

  • Harness or connector
  • No. 3 active noise control microphone
  • Stereo component equalizer assembly

B1AAB1C

Rear Center Microphone Circuit Circuit Voltage Out of Range

Stereo component equalizer assembly detects No. 3 active noise control microphone connection malfunction for 4 seconds or more continuously*

  • Harness or connector
  • No. 3 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. 3 ACTIVE NOISE CONTROL MICROPHONE)

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

(b) Disconnect the P17 No. 3 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

G15-5 (MC3+) - P17-1 (MC3+)

Always

Below 1 Ω

G15-19 (MC3-) - P17-2 (MC3-)

Always

Below 1 Ω

G15-5 (MC3+) or P17-1 (MC3+) - Body ground

Always

10 kΩ or higher

G15-19 (MC3-) or P17-2 (MC3-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

REPLACE NO. 3 ACTIVE NOISE CONTROL MICROPHONE

(a) Replace the No. 3 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. 3 ACTIVE NOISE CONTROL MICROPHONE IS DEFECTIVE)

NG

REPLACE STEREO COMPONENT EQUALIZER ASSEMBLY

READ NEXT:

 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

 Diagnostic Trouble Code Chart

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 Dtc Check / Clear

DTC CHECK / CLEAR CHECK FOR DTC (CHECK USING TECHSTREAM) (a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Elec

SEE MORE:

 On-vehicle Inspection

ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT CAMSHAFT TIMING OIL CONTROL SOLENOID ASSEMBLY (a) Connect the Techstream to the DLC3. (b) Start the engine. (c) Turn the Techstream on. (d) Inspect the camshaft timing oil control solenoid assembly (for intake side). (1) Enter the following menus: Powertrai

 Installation

INSTALLATION CAUTION / NOTICE / HINT HINT: Use the same procedure for the RH side and LH side. The following procedure is for the LH side. PROCEDURE 1. PRECAUTION NOTICE: After turning the engine switch (for Gasoline Model) or power switch (for HV Model) off, waiting time may be required bef

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