Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001MM4T
Model Year Start: 2020 Model: RAV4 Prod Date Range: [01/2020 - 10/2022]
Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: B1579; Voice Recognition Microphone Disconnected; 2020 - 2022 MY RAV4 RAV4 HV [01/2020 - 10/2022]

DTC

B1579

Voice Recognition Microphone Disconnected

DESCRIPTION

The radio and display receiver assembly, map light assembly and telephone 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.

Detection Item

DTC Detection Condition

Trouble Area

B1579

Voice Recognition Microphone Disconnected

Microphone signal is lost
  • Map light assembly
  • Telephone microphone assembly
  • Radio and display receiver assembly
  • DCM (telematics transceiver)*
  • Harness or connector
  • *: w/ Manual (SOS) Switch

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • When replacing the radio and display receiver assembly, always replace it with a new one. If a radio and display receiver assembly which was installed to another vehicle is used, the following may occur:
    • A communication malfunction DTC may be stored.
    • The radio and display receiver assembly may not operate normally.
  • Before replacing the DCM (telematics transceiver), refer to Registration.

    for HV Model: Click here 2020 - 2021 MY RAV4 HV [10/2019 - 12/2021]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION 2022 - 2024 MY RAV4 HV [12/2021 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION

    for Gasoline Model: Click here 2020 MY RAV4 [10/2019 - 08/2020]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION 2021 MY RAV4 [08/2020 - 12/2021]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION 2022 - 2024 MY RAV4 [12/2021 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION

  • When replacing the DCM (telematics transceiver), make sure to replace it with a new one.

HINT:

Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Audio and Visual System.

Click here 2020 - 2022 MY RAV4 RAV4 HV [10/2019 - 10/2022]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: PRECAUTION

PROCEDURE

1.

CHECK VEHICLE TYPE

(a) Check the vehicle type.

Result

Proceed to

for TMC Made and w/ Manual (SOS) Switch

A

for TMMC Made and w/ Manual (SOS) Switch

B

for TMC Made and w/o Manual (SOS) Switch

C

for TMMC Made and w/o Manual (SOS) Switch

D
B

GO TO STEP 5

C

GO TO STEP 8

D

GO TO STEP 11

A

2.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY)

(a) Disconnect the G2 radio and display receiver assembly connector.

(b) Disconnect the P20 map light assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G2-25 (SNS2) - P20-6 (SNS2)

Always

Below 1 Ω

G2-25 (SNS2) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

3.

CHECK HARNESS AND CONNECTOR (DCM [TELEMATICS TRANSCEIVER] - TELEPHONE MICROPHONE ASSEMBLY)

(a) Disconnect the G131 DCM (telematics transceiver) connector.

(b) Disconnect the P20 telephone microphone assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G131-7 (MCI-) - P20-7 (MCO-)

Always

Below 1 Ω

G131-7 (MCI-) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

4.

CHECK DCM (TELEMATICS TRANSCEIVER) (MCI-)

(a) Remove the DCM (telematics transceiver) with the connector(s) still connected.

Click here 2020 - 2022 MY RAV4 RAV4 HV [10/2019 - 10/2022]; CELLULAR COMMUNICATION: DCM(TELEMATICS TRANSCEIVER): REMOVAL

*a

Component with harness connected

(DCM [Telematics Transceiver])

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G131-7 (MCI-) - Body ground

Always

Below 1 Ω
OK

GO TO STEP 10

NG

REPLACE DCM (TELEMATICS TRANSCEIVER)

5.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY)

(a) Disconnect the G2 radio and display receiver assembly connector.

(b) Disconnect the P14 map light assembly connector.

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

Standard Resistance:

w/ Panoramic Moon Roof System

Tester Connection

Condition

Specified Condition

G2-25 (SNS2) - P14-4 (SNS2)

Always

Below 1 Ω

G2-25 (SNS2) - Body ground

Always

10 kΩ or higher

w/o Panoramic Moon Roof System

Tester Connection

Condition

Specified Condition

G2-25 (SNS2) - P14-5 (SNS2)

Always

Below 1 Ω

G2-25 (SNS2) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

6.

CHECK HARNESS AND CONNECTOR (DCM [TELEMATICS TRANSCEIVER] - TELEPHONE MICROPHONE ASSEMBLY)

(a) Disconnect the G131 DCM (telematics transceiver) connector.

(b) Disconnect the P14 telephone microphone assembly connector.

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

Standard Resistance:

w/ Panoramic Moon Roof System

Tester Connection

Condition

Specified Condition

G131-7 (MCI-) - P14-5 (MCO-)

Always

Below 1 Ω

G131-7 (MCI-) - Body ground

Always

10 kΩ or higher

w/o Panoramic Moon Roof System

Tester Connection

Condition

Specified Condition

G131-7 (MCI-) - P14-6 (MCO-)

Always

Below 1 Ω

G131-7 (MCI-) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

7.

CHECK DCM (TELEMATICS TRANSCEIVER) (MCI-)

(a) Remove the DCM (telematics transceiver) with the connector(s) still connected.

Click here 2020 - 2022 MY RAV4 RAV4 HV [10/2019 - 10/2022]; CELLULAR COMMUNICATION: DCM(TELEMATICS TRANSCEIVER): REMOVAL

*a

Component with harness connected

(DCM [Telematics Transceiver])

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G131-7 (MCI-) - Body ground

Always

Below 1 Ω
OK

GO TO STEP 13

NG

REPLACE DCM (TELEMATICS TRANSCEIVER)

8.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY)

(a) Disconnect the G2 radio and display receiver assembly connector.

(b) Disconnect the P20 map light assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G2-25 (SNS2) - P20-6 (SNS2)

Always

Below 1 Ω

G2-22 (MIN-) - P20-7 (MCO-)

Always

Below 1 Ω

G2-25 (SNS2) - Body ground

Always

10 kΩ or higher

G2-22 (MIN-) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

9.

INSPECT MAP LIGHT ASSEMBLY

(a) Remove the map light assembly.

Click here 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; LIGHTING (INT): PERSONAL LIGHT: REMOVAL

*a

Component without harness connected

(Map Light Assembly)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

6 (SNS2) - 7 (MCO-)

Always

Below 1 Ω
OK

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

NG

10.

INSPECT MAP LIGHT ASSEMBLY

(a) Remove the map light assembly.

Click here 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; LIGHTING (INT): PERSONAL LIGHT: REMOVAL

*a

Component without harness connected

(Map Light Assembly [Wire Harness Side])

*b

Component without harness connected

(Map Light Assembly [Telephone Microphone Assembly Side])

(b) Disconnect the telephone microphone assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

6 (SNS2) - A-1 (SNS2)

Always

Below 1 Ω

7 (MCO-) - A-2 (MIC-)

Always

Below 1 Ω
OK

REPLACE TELEPHONE MICROPHONE ASSEMBLY 2019 - 2021 MY RAV4 RAV4 HV [11/2018 - 12/2021]; CELLULAR COMMUNICATION: TELEPHONE MICROPHONE: REMOVAL 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; CELLULAR COMMUNICATION: TELEPHONE MICROPHONE: REMOVAL

NG

REPLACE MAP LIGHT ASSEMBLY

11.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - MAP LIGHT ASSEMBLY)

(a) Disconnect the G2 radio and display receiver assembly connector.

(b) Disconnect the P14 map light assembly connector.

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

Standard Resistance:

w/ Panoramic Moon Roof System

Tester Connection

Condition

Specified Condition

G2-25 (SNS2) - P14-4 (SNS2)

Always

Below 1 Ω

G2-22 (MIN-) - P14-5 (MCO-)

Always

Below 1 Ω

G2-25 (SNS2) - Body ground

Always

10 kΩ or higher

G2-22 (MIN-) - Body ground

Always

10 kΩ or higher

w/o Panoramic Moon Roof System

Tester Connection

Condition

Specified Condition

G2-25 (SNS2) - P14-5 (SNS2)

Always

Below 1 Ω

G2-22 (MIN-) - P14-6 (MCO-)

Always

Below 1 Ω

G2-25 (SNS2) - Body ground

Always

10 kΩ or higher

G2-22 (MIN-) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

12.

INSPECT MAP LIGHT ASSEMBLY

(a) Remove the map light assembly.

Click here 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; LIGHTING (INT): PERSONAL LIGHT: REMOVAL

*A

w/ Panoramic Moon Roof System

*B

w/o Panoramic Moon Roof System

*a

Component without harness connected

(Map Light Assembly)

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

Standard Resistance:

w/ Panoramic Moon Roof System

Tester Connection

Condition

Specified Condition

4 (SNS2) - 5 (MCO-)

Always

Below 1 Ω

w/o Panoramic Moon Roof System

Tester Connection

Condition

Specified Condition

5 (SNS2) - 6 (MCO-)

Always

Below 1 Ω
OK

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

NG

13.

INSPECT MAP LIGHT ASSEMBLY

(a) Remove the map light assembly.

Click here 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; LIGHTING (INT): PERSONAL LIGHT: REMOVAL

*A

w/ Panoramic Moon Roof System

*B

w/o Panoramic Moon Roof System

*a

Component without harness connected

(Map Light Assembly [Wire Harness Side])

*b

Component without harness connected

(Map Light Assembly [Telephone Microphone Assembly Side])

(b) Disconnect the telephone microphone assembly connector.

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

Standard Resistance:

w/ Panoramic Moon Roof System

Tester Connection

Condition

Specified Condition

4 (SNS2) - A-1 (SNS2)

Always

Below 1 Ω

5 (MCO-) - A-2 (MIC-)

Always

Below 1 Ω

w/o Panoramic Moon Roof System

Tester Connection

Condition

Specified Condition

5 (SNS2) - A-1 (SNS2)

Always

Below 1 Ω

6 (MCO-) - A-2 (MIC-)

Always

Below 1 Ω
OK

REPLACE TELEPHONE MICROPHONE ASSEMBLY 2019 - 2021 MY RAV4 RAV4 HV [11/2018 - 12/2021]; CELLULAR COMMUNICATION: TELEPHONE MICROPHONE: REMOVAL 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; CELLULAR COMMUNICATION: TELEPHONE MICROPHONE: REMOVAL

NG

REPLACE MAP LIGHT ASSEMBLY