Toyota Venza: Voice Recognition Microphone Disconnected (B1579)

Toyota Venza Service Manual / Navigation / Multi Info Display / Navigation System / Voice Recognition Microphone Disconnected (B1579)

DESCRIPTION

The navigation receiver assembly and inner rear view mirror assembly (amplifier 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 No.	DTC Detection Condition	Trouble Area
B1579	Telephone microphone signal is lost.	Inner rear view mirror assembly (amplifier microphone assembly) Navigation receiver assembly Harness or connector

WIRING DIAGRAM

PROCEDURE

1.	INSPECT NAVIGATION RECEIVER ASSEMBLY

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
E40-19 (MIN-) - Body ground	Always	Below 1 Ω

Text in Illustration

*a	Component with harness connected (Navigation Receiver Assembly)

REPLACE NAVIGATION RECEIVER ASSEMBLY

2.	CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY))

(a) Disconnect the E40 navigation receiver assembly connector.

(b) Disconnect the P12 inner rear view mirror assembly (amplifier microphone assembly) connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
E40-6 (SNS2) - P12-10 (SGND)	Always	Below 1 Ω
E40-19 (MIN-) - P12-12 (MIC-)	Always	Below 1 Ω
E40-6 (SNS2) - Body ground	Always	10 kΩ or higher
E40-19 (MIN-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	INSPECT INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY)

(a) Remove the inner rear view mirror assembly (amplifier microphone assembly) (See page ).

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
10 (SGND) - 12 (MIC-)	Always	Below 1 Ω

Text in Illustration

*a	Component without harness connected (Inner Rear View Mirror Assembly (Amplifier Microphone Assembly))

REPLACE NAVIGATION RECEIVER ASSEMBLY

REPLACE INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY)

LVDS Signal Malfunction (from Extension Module) (B1532)

DESCRIPTION The stereo component tuner assembly and the navigation receiver assembly are connected by the LVDS communication line. This DTC is stored when an LVDS communication error occurs betwee ...

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 ...

Other materials about Toyota Venza:

Installation
INSTALLATION PROCEDURE 1. INSTALL BRAKE MASTER CYLINDER SUB-ASSEMBLY NOTICE: When install a new brake master cylinder sub-assembly, remove the protectors from the piston and outlet ports. (a) Install a new O-ring to the brake master cylinder sub-assembl ...

Power Management Control ECU Communication Stop Mode
DESCRIPTION Detection Item Symptom Trouble Area Power Management Control ECU Communication Stop Mode "Electric Power Control" is not displayed on the CAN Bus Check screen ...

Front Sensor Communication Malfunction (C1AEC)
DESCRIPTION This DTC is stored when there is an open or short circuit in the communication line between the front sensors and the ECU, or when there is a malfunction in a front sensor. DTC No. DTC Detection Condition Trou ...