Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Voice Recognition Microphone Disconnected (B1579)

Toyota Tacoma 2015-2018 Service Manual / Audio / Video / Audio And Visual System / Voice Recognition Microphone Disconnected (B1579)

DESCRIPTION

The radio and display 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.

DTC Code

DTC Detection Condition

Trouble Area

B1579

Telephone microphone signal is lost.

  • Telephone microphone assembly
  • Radio and display receiver assembly
  • Harness or connector

WIRING DIAGRAM

PROCEDURE

PROCEDURE

1.

INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY

(a) Remove the radio and display receiver assembly with connectors still connected.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

R31-19 (MIN-) - Body ground

Always

Below 1 Ω

*a

Component with harness connected

(Radio and Display Receiver Assembly)

NG

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

OK

2.

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

(a) Disconnect the R31 radio and display receiver assembly connector.

(b) Disconnect the T26 telephone microphone assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

R31-6 (SNS2) - T26-3 (SNS2)

Always

Below 1 Ω

R31-19 (MIN-) - T26-4 (MIC-)

Always

Below 1 Ω

R31-6 (SNS2) - Body ground

Always

10 kΩ or higher

R31-19 (MIN-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

INSPECT TELEPHONE MICROPHONE ASSEMBLY

(a) Remove the telephone microphone assembly.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3 (SNS2) - 4 (MIC-)

Always

Below 1 Ω

*a

Component without harness connected

(Telephone Microphone Assembly)

OK

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

NG

REPLACE TELEPHONE MICROPHONE ASSEMBLY

Sending Malfunction (Navigation to APGS) (U0073,U0100,U0140,U0155)
DESCRIPTION These DTCs are stored when a malfunction occurs in the CAN communication circuit. DTC No. DTC Detection Condition Trouble Area U0073 ...

Satellite Radio Broadcast cannot be Received
CAUTION / NOTICE / HINT NOTICE: Some satellite radio broadcasts require payment. A contract must be made between a satellite radio company and the user. If the contract expires, it w ...

Other materials:

Data Signal Circuit between Radio Receiver and Extension Module
DESCRIPTION The stereo component tuner assembly sends the image data signal to the radio and display receiver assembly via this circuit. WIRING DIAGRAM PROCEDURE 1. CHECK NO. 1 NAVIGATION WIRE (a) Disconnect the R33 radio and display receiver assembly connect ...

On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT CAMSHAFT TIMING GEAR BOLT (a) Remove the camshaft timing oil control solenoid assembly (See page ). (b) Check that the plunger strokes when the plunger in the center of the camshaft timing gear bolt is pressed. Standard stroke: 4 ...

Installation
INSTALLATION CAUTION / NOTICE / HINT PROCEDURE 1. INSTALL REAR AIRBAG SENSOR LH (a) Check that the ignition switch is OFF. (b) Check that the cable is disconnected from the battery negative (-) terminal. CAUTION: After disconnecting the cable from the terminal, wait for at least 90 seconds ...

© 2011-2022 Copyright www.ttguide.net