Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Voice Recognition Microphone2 Circuit Open (B154913)

Toyota Corolla Cross (2022-2024) Service Manual / Audio & Visual & Telematics / Audio / Video / Audio And Visual System / Voice Recognition Microphone2 Circuit Open (B154913)

DESCRIPTION

The telephone microphone assembly RH is connected to the radio and display receiver assembly via voice recognition microphone 2 signal detection line.

This DTC is stored when the radio and display receiver assembly detects disconnection of telephone microphone assembly RH.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

Priority

B154913

Voice Recognition Microphone2 Circuit Open

Voice recognition microphone 2 terminal (SNS2) disconnected

(2 trip detection logic)
  • Telephone microphone assembly RH
  • Radio and display receiver assembly
  • Harness or connector

Navigation System

A

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.

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PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY RH)

(a) Disconnect the I254 radio and display receiver assembly connector.

(b) Disconnect the T34 telephone microphone assembly RH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

T34-5 (SNS2) - I254-21 (SNS2)

Always

Below 1 Ω

T34-4 (MO2-) - I254-18 (MI2-)

Always

Below 1 Ω

T34-5 (SNS2) - Body ground

Always

10 kΩ or higher

T34-4 (MO2-) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

2.

INSPECT RADIO & DISPLAY RECEIVER ASSEMBLY (MI2-)

(a) With the radio and display receiver assembly connectors connected, disconnect the T34 telephone microphone assembly RH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

T34-4 (MO2-) - Body ground

Always

Below 1 Ω
NG

REPLACE RADIO & DISPLAY RECEIVER ASSEMBLY

OK

3.

INSPECT TELEPHONE MICROPHONE ASSEMBLY RH (SNS2, MO2-)

(a) Remove the telephone microphone assembly RH.

*a

Component without harness connected

(Telephone microphone assembly RH)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

5 (SNS2) - 4 (MO2-)

Always

Below 1 Ω
OK

REPLACE RADIO & DISPLAY RECEIVER ASSEMBLY

NG

REPLACE TELEPHONE MICROPHONE ASSEMBLY RH

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