Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Voice Recognition Microphone Disconnected (B1579)

DESCRIPTION

The radio receiver assembly and telephone microphone assembly are connected to each other using the microphone connection detection signal lines.

This DTC is stored when a microphone connection detection signal line is disconnected.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Audio and Visual System.

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PROCEDURE

(a) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection Condition Specified Condition J151-22 (MIN-) - Body ground Always Below 1 Ω

*a Component with harness connected (Radio Receiver Assembly)

NG

REPLACE RADIO RECEIVER ASSEMBLY

OK

(a) Disconnect the J151 radio receiver assembly connector.

(b) Disconnect the U15 telephone microphone assembly connector.

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

Standard Resistance:

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

(a) Remove the telephone microphone assembly.

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(b) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection Condition Specified Condition 3 (SNS2) - 4 (MCO-) Always Below 1 Ω

*a Component without harness connected (Telephone Microphone Assembly)

OK

REPLACE RADIO RECEIVER ASSEMBLY

NG

REPLACE TELEPHONE MICROPHONE ASSEMBLY