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

Toyota Tacoma (2015-2018) Service Manual / Navigation / Multi Info Display / Navigation System / Voice Recognition Microphone Disconnected (B1579)

DESCRIPTION

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

This DTC is stored when the microphone connection detection signal is disconnected.

DTC Code	DTC Detection Condition	Trouble Area
B1579	Telephone microphone signal is lost.	Telephone microphone assembly Navigation receiver assembly Harness or connector

WIRING DIAGRAM

PROCEDURE

1.	INSPECT NAVIGATION RECEIVER ASSEMBLY

(a) Remove the navigation receiver assembly with connector still connected.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
N25-19 (MIN-) - Body ground	Always	Below 1 Ω

*a	Component with harness connected (Navigation Receiver Assembly)

REPLACE NAVIGATION RECEIVER ASSEMBLY

2.	CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - TELEPHONE MICROPHONE ASSEMBLY)

(a) Disconnect the N25 navigation receiver assembly connector.

(b) Disconnect the T26 telephone microphone assembly.

Standard Resistance:

Tester Connection	Condition	Specified Condition
N25-6 (SNS2) - T26-3 (SNS2)	Always	Below 1 Ω
N25-19 (MIN-) - T26-4 (MIC-)	Always	Below 1 Ω
N25-6 (SNS2) - Body ground	Always	10 kΩ or higher
N25-19 (MIN-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	INSPECT TELEPHONE MICROPHONE ASSEMBLY

(a) Remove the telephone microphone assembly (See page ).

(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)

REPLACE NAVIGATION RECEIVER ASSEMBLY

REPLACE TELEPHONE MICROPHONE ASSEMBLY

Stereo Component Amplifier Disconnected (B15D3)

DESCRIPTION The navigation receiver assembly and stereo component amplifier assembly are connected by the AVC-LAN communication line. When an AVC-LAN communication error occurs between the navigat ...

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:

Short in Curtain Shield Squib RH Circuit (B1830/57-B1833/57)
DESCRIPTION The front passenger side curtain shield squib circuit consists of the airbag sensor assembly and the curtain shield airbag assembly RH. The circuit signals the SRS to deploy when airbag deployment conditions are met. These DTCs are set when a malfunction is detected in the front pas ...

Manual Shifting Test
MANUAL SHIFTING TEST 1. PERFORM MANUAL SHIFTING TEST HINT: Using this test, it can be determined whether a problem is in an electrical circuit or if it is a mechanical problem in the transmission. If any abnormalities are found in the following test, the problem is in the tran ...

Voltage Inverter
Components COMPONENTS ILLUSTRATION Inspection INSPECTION PROCEDURE 1. INSPECT VOLTAGE INVERTER ASSEMBLY (a) Check the voltage inverter assembly. (1) Measure the voltage according to the value(s) in the table below. Text in Illustration *a Component with harness ...