Toyota Venza manuals

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)



NG

REPLACE NAVIGATION RECEIVER ASSEMBLY


OK

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.

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

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


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

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))



OK

REPLACE NAVIGATION RECEIVER ASSEMBLY


NG

REPLACE INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY)

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