Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VJ7K
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 11/2017]
Title: NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: B1579; Voice Recognition Microphone Disconnected; 2016 - 2017 MY Sienna [12/2015 - 11/2017]

DTC

B1579

Voice Recognition Microphone Disconnected

DESCRIPTION

The navigation receiver assembly and 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 Code

DTC Detection Condition

Trouble Area

B1579

Microphone signal is lost
  • Amplifier microphone assembly
  • DCM (telematics transceiver)*1
  • Navigation receiver assembly
  • Harness or connector
  • *1: w/ Safety Connect System

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

If the DCM (telematics transceiver) has been replaced, perform the DCM Activation procedure using the Techstream (w/ Safety Connect System) (See page 2016 MY Sienna [12/2015 - 08/2016]; INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION 2017 MY Sienna [08/2016 - 11/2017]; INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION ).

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

D153-19 (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.

CONFIRM MODEL

(a) Choose the model to be inspected.

Result

Result

Proceed to

w/ Safety Connect System

A

w/o Safety Connect System

B
B

GO TO STEP 7

A

3.

CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - AMPLIFIER MICROPHONE ASSEMBLY)

(a) Disconnect the D73 DCM (telematics transceiver) connector.

(b) Disconnect the T29 amplifier microphone assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D73-35 (MCI-) - T29-3 (MIC-)

Always

Below 1 Ω

D73-35 (MCI-) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

4.

CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER))

(a) Disconnect the D153 navigation receiver assembly connector.

(b) Disconnect the D73 DCM (telematics transceiver) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D153-19 (MIN-) - D73-19 (MCO-)

Always

Below 1 Ω

D153-19 (MIN-) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

5.

CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - AMPLIFIER MICROPHONE ASSEMBLY)

(a) Disconnect the D153 navigation receiver assembly connector.

(b) Disconnect the T29 amplifier microphone assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D153-6 (SNS2) - T29-4 (SNS2)

Always

Below 1 Ω

D153-6 (SNS2) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

6.

INSPECT DCM (TELEMATICS TRANSCEIVER)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D73-35 (MCI-) - Body ground

Always

Below 1 Ω

Result

Result

Proceed to

NG

A

OK

B

Text in Illustration

*a

Component with harness connected

(DCM (Telematics Transceiver))
A

REPLACE DCM (TELEMATICS TRANSCEIVER)

B

GO TO STEP 8

7.

CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - AMPLIFIER MICROPHONE ASSEMBLY)

(a) Disconnect the D153 navigation receiver assembly connector.

(b) Disconnect the T29 amplifier microphone assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D153-6 (SNS2) - T29-4 (SNS2)

Always

Below 1 Ω

D153-19 (MIN-) - T29-3 (MIC-)

Always

Below 1 Ω

D153-6 (SNS2) - Body ground

Always

10 kΩ or higher

D153-19 (MIN-) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

8.

INSPECT AMPLIFIER MICROPHONE ASSEMBLY

(a) Remove the amplifier microphone assembly (See page 2016 - 2018 MY Sienna [12/2015 - 08/2018]; AUDIO / VIDEO: MICROPHONE AMPLIFIER: REMOVAL ).

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

4 (SNS2) - 3 (MIC-)

Always

Below 1 Ω

Text in Illustration

*a

Component without harness connected

(Amplifier Microphone Assembly)
OK

REPLACE NAVIGATION RECEIVER ASSEMBLY

NG

REPLACE AMPLIFIER MICROPHONE ASSEMBLY