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:

Brake Switch "B" Circuit High (P0724)
DESCRIPTION The purpose of this circuit is to prevent the engine from stalling when brakes are suddenly applied while driving in lock-up condition. When the brake pedal is depressed, the stop light switch sends a signal to the ECM. Then the ECM cancels t ...

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" ...

Glass Position Initialization Incomplete (B2313)
DESCRIPTION The power window regulator motor assembly is operated by the power window regulator master switch assembly or power window regulator switch assembly. The power window regulator motor assembly has motor, regulator and ECU functions. When the E ...