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:

System Diagram
SYSTEM DIAGRAM Input and Output Signal of Each ECU Transmitting ECU (transmitter) Receiving ECU Signal Communication Method Power management Control ECU Steering Lock ECU (Steering Lock ...

Relay
On-vehicle Inspection ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT TAILLIGHT RELAY (TAIL) (a) Remove the taillight relay from the main body ECU (driver side junction block assembly). (b) Measur ...

Front Left Sensor Malfunction (C1AE1)
DESCRIPTION The No. 1 ultrasonic sensor (front left sensor) is installed on the front bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic sensor (front left sensor). If the No. 1 ultrasonic sensor (front left sensor) has ...