Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Voice Recognition Microphone1 Circuit Open (B157913)

DESCRIPTION

The telephone microphone assembly LH is connected to the radio and display receiver assembly via voice recognition microphone 1 signal detection line.

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

Priority

B157913

Voice Recognition Microphone1 Circuit Open

Voice recognition microphone 1 terminal (SNS) disconnected

(2 trip detection logic)

  • Telephone microphone assembly LH
  • Radio and display receiver assembly
  • Harness or connector
  • Telematics transceiver*1

Navigation System

A

  • *1: w/ Telematics Transceiver

WIRING DIAGRAM

w/ Telematics Transceiver w/o Telematics Transceiver

CAUTION / NOTICE / HINT

NOTICE:

  • When replacing the telematics transceiver, make sure to replace it with a new one.
  • Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed.

    Click here

PROCEDURE

1.

CHECK MODEL

Result

Proceed to

w/ Telematics Transceiver

A

w/o Telematics Transceiver

B

B

GO TO STEP 5

A

2.

CHECK HARNESS AND CONNECTOR (TELEPHONE MICROPHONE ASSEMBLY LH - RADIO AND DISPLAY RECEIVER ASSEMBLY, TELEMATICS TRANSCEIVER)

(a) Disconnect the T30 telephone microphone assembly LH connector.

(b) Disconnect the I253 radio and display receiver assembly connector.

(c) Disconnect the I200 telematics transceiver connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

T30-5 (SNS1) - I253-25 (SNS)

Always

Below 1 Ω

T30-4 (MO1-) - I200-7 (MCI-)

Always

Below 1 Ω

T30-5 (SNS1) - Body ground

Always

10 kΩ or higher

T30-4 (MO1-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

INSPECT TELEMATICS TRANSCEIVER (MCI-)

(a) With the telematics transceiver connector connected, disconnect the T30 telephone microphone assembly LH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

T30-4 (MO1-) - Body ground

Always

Below 1 Ω

NG

REPLACE TELEMATICS TRANSCEIVER

OK

4.

INSPECT TELEPHONE MICROPHONE ASSEMBLY LH (SNS1, MO1-)

(a) Remove the telephone microphone assembly LH.

*a

Component without harness connected

(Telephone microphone assembly LH)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

5 (SNS1) - 4 (MO1-)

Always

Below 1 Ω

OK

REPLACE RADIO & DISPLAY RECEIVER ASSEMBLY

NG

REPLACE TELEPHONE MICROPHONE ASSEMBLY LH

5.

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

(a) Disconnect the I253 radio and display receiver assembly connector.

(b) Disconnect the T30 telephone microphone assembly LH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

T30-5 (SNS1) - I253-25 (SNS)

Always

Below 1 Ω

T30-4 (MO1-) - I253-22 (MIN-)

Always

Below 1 Ω

T30-5 (SNS1) - Body ground

Always

10 kΩ or higher

T30-4 (MO1-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

6.

INSPECT RADIO AND DISPLAY ASSEMBLY (MIN-)

(a) With the radio and display receiver assembly connectors connected, disconnect the T30 telephone microphone assembly LH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

T30-4 (MO1-) - Body ground

Always

Below 1 Ω

NG

REPLACE RADIO AND DISPLAY ASSEMBLY

OK

7.

INSPECT TELEPHONE MICROPHONE ASSEMBLY LH (SNS1, MO1-)

(a) Remove the telephone microphone assembly LH.

*a

Component without harness connected

(Telephone microphone assembly LH)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

5 (SNS1) - 4 (MO1-)

Always

Below 1 Ω

OK

REPLACE RADIO & DISPLAY RECEIVER ASSEMBLY

NG

REPLACE TELEPHONE MICROPHONE ASSEMBLY LH

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