Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001KGAH
Model Year Start: 2020 Model: RAV4 Prod Date Range: [10/2019 - 01/2020]
Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: Microphone Circuit; 2020 MY RAV4 RAV4 HV [10/2019 - 01/2020]

Microphone Circuit

DESCRIPTION

  • w/o Manual (SOS) Switch:

    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.

    Using this circuit, the radio and display receiver assembly sends power to the map light assembly and telephone microphone assembly, and the map light assembly and telephone microphone assembly sends microphone signals to the radio and display receiver assembly.

  • w/ Manual (SOS) Switch:

    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.

    Using this circuit, the DCM (telematics transceiver) sends power to the map light assembly and telephone microphone assembly, and the map light assembly and telephone microphone assembly sends microphone signals to the radio and display receiver assembly via the DCM (telematics transceiver).

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • 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

  • 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

    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

PROCEDURE

1.

CHECK MICROPHONE (OPERATION CHECK)

(a) Enter the "Microphone Check" screen. Refer to Check Microphone in Operation Check.

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

(b) When a voice is input into the microphone, check that the microphone input level meter changes according to the input voice.

OK:

Check result is normal.

Result

Proceed to

NG (w/o Manual [SOS] Switch)

A

NG (w/ Manual [SOS] Switch)

B

OK

C
B

GO TO STEP 6

C

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

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*1, P14*2 map light assembly connector.

  • *1: for TMC Made

    *2: for TMMC Made

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

Standard Resistance:

for TMC Made

Tester Connection

Condition

Specified Condition

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

Always

Below 1 Ω

G2-23 (MACC) - P20-9 (MACC)

Always

Below 1 Ω

G2-21 (MIN+) - P20-8 (MCO+)

Always

Below 1 Ω

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

Always

Below 1 Ω

G2-25 (SNS2) - Body ground

Always

10 kΩ or higher

G2-23 (MACC) - Body ground

Always

10 kΩ or higher

G2-21 (MIN+) - Body ground

Always

10 kΩ or higher

G2-22 (MIN-) - Body ground

Always

10 kΩ or higher

G2-24 (SGND) - Body ground

Always

10 kΩ or higher

for TMMC Made

Tester Connection

Condition

Specified Condition

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

Always

Below 1 Ω

G2-23 (MACC) - P14-3 (MACC)

Always

Below 1 Ω

G2-21 (MIN+) - P14-4 (MCO+)

Always

Below 1 Ω

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

Always

Below 1 Ω

G2-25 (SNS2) - Body ground

Always

10 kΩ or higher

G2-23 (MACC) - Body ground

Always

10 kΩ or higher

G2-21 (MIN+) - Body ground

Always

10 kΩ or higher

G2-22 (MIN-) - Body ground

Always

10 kΩ or higher

G2-24 (SGND) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

3.

CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY

(a) Remove the radio and display receiver assembly with the connector(s) still connected.

Click here 2019 - 2022 MY RAV4 RAV4 HV [11/2018 - 10/2022]; AUDIO / VIDEO: RADIO RECEIVER: REMOVAL

*a

Component with harness connected

(Radio and Display Receiver Assembly)

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

G2-23 (MACC) - Body ground

Ignition switch ON

4 to 6 V

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G2-24 (SGND) - Body ground

Always

Below 1 Ω

G2-22 (MIN-) - Body ground

Always

Below 1 Ω
NG

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

OK

4.

CHECK MAP LIGHT ASSEMBLY (OUTPUT TO RADIO AND DISPLAY RECEIVER ASSEMBLY)
  • *1: for TMC Made
  • *2: for TMMC Made

(a) Remove the map light assembly with the connector(s) still connected.

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

*A

for TMC Made

*B

for TMMC Made

*a

Component with harness connected

(to Map Light Assembly)

(b) Connect an oscilloscope to terminals 8 (MCO+) and 7 (MCO-) of the P20 map light assembly connector.*1

(c) Connect an oscilloscope to terminals 4 (MCO+) or 6 (MCO-) of the P14 map light assembly connector.*2

(d) Check the signal waveform according to the condition(s) in the table below.

Item

Condition

Measurement terminal

P20-8 (MCO+) - P20-7 (MCO-)*1

P14-4 (MCO+) - P14-6 (MCO-)*2

Tool setting

50 mV/DIV., 500 ms/DIV.

Vehicle condition
  1. Turn the ignition switch to ON.
  2. Sound is input to the map light assembly when the user is closer than 125 mm (4.92 in.) from the map light assembly sound holes.

OK:

The waveform is similar to that shown in the illustration.

HINT:

The oscilloscope waveform shown in the illustration is an example for reference only.

OK

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

NG

5.

INSPECT MAP LIGHT ASSEMBLY

(a) Remove the map light assembly.

Click here 2019 - 2021 MY RAV4 RAV4 HV [11/2018 - 12/2021]; LIGHTING (INT): ROOM LIGHT: REMOVAL

*A

for TMC Made

*B

for TMMC Made

*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:

for TMC Made

Tester Connection

Condition

Specified Condition

6 (SNS2) - A-1 (SNS2)

Always

Below 1 Ω

9 (MACC) - A-5 (MACC)

Always

Below 1 Ω

8 (MCO+) - A-3 (MIC+)

Always

Below 1 Ω

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

Always

Below 1 Ω

6 (SNS2) - 7 (MCO-)

Always

10 kΩ or higher

6 (SNS2) - 8 (MCO+)

Always

10 kΩ or higher

6 (SNS2) - 9 (MACC)

Always

10 kΩ or higher

7 (MCO-) - 8 (MCO+)

Always

10 kΩ or higher

7 (MCO-) - 9 (MACC)

Always

10 kΩ or higher

8 (MCO+) - 9 (MACC)

Always

10 kΩ or higher

for TMMC Made

Tester Connection

Condition

Specified Condition

5 (SNS2) - A-1 (SNS2)

Always

Below 1 Ω

3 (MACC) - A-5 (MACC)

Always

Below 1 Ω

4 (MCO+) - A-3 (MIC+)

Always

Below 1 Ω

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

Always

Below 1 Ω

5 (SNS2) - 6 (MCO-)

Always

10 kΩ or higher

5 (SNS2) - 4 (MCO+)

Always

10 kΩ or higher

5 (SNS2) - 3 (MACC)

Always

10 kΩ or higher

6 (MCO-) - 4 (MCO+)

Always

10 kΩ or higher

4 (MCO-) - 3 (MACC)

Always

10 kΩ or higher

4 (MCO+) - 3 (MACC)

Always

10 kΩ or higher
OK

REPLACE TELEPHONE MICROPHONE ASSEMBLY

NG

REPLACE MAP LIGHT ASSEMBLY

6.

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*1, P14*2 map light assembly connector.

  • *1: for TMC Made

    *2: for TMMC Made

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

Standard Resistance:

for TMC Made

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

for TMMC Made

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

7.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - DCM [TELEMATICS TRANSCEIVER])

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

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G2-21 (MIN+) - G131-16 (MCO+)

Always

Below 1 Ω

G2-22 (MIN-) - G131-32 (MCO-)

Always

Below 1 Ω

G2-21 (MIN+) - Body ground

Always

10 kΩ or higher

G2-22 (MIN-) - Body ground

Always

10 kΩ or higher

G2-24 (SGND) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

8.

CHECK HARNESS AND CONNECTOR (DCM [TELEMATICS TRANSCEIVER] - MAP LIGHT ASSEMBLY)

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

(b) Disconnect the P20*1, P14*2 map light assembly connector.

  • *1: for TMC Made

    *2: for TMMC Made

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

Standard Resistance:

for TMC Made

Tester Connection

Condition

Specified Condition

G131-5 (MCVD) - P20-9 (MACC)

Always

Below 1 Ω

G131-6 (MCI+) - P20-8 (MCO+)

Always

Below 1 Ω

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

Always

Below 1 Ω

G131-5 (MCVD) - Body ground

Always

10 kΩ or higher

G131-6 (MCI+) - Body ground

Always

10 kΩ or higher

G131-7 (MCI-) - Body ground

Always

10 kΩ or higher

G131-23 (SGND) - Body ground

Always

10 kΩ or higher

for TMMC Made

Tester Connection

Condition

Specified Condition

G131-5 (MCVD) - P14-3 (MACC)

Always

Below 1 Ω

G131-6 (MCI+) - P14-4 (MCO+)

Always

Below 1 Ω

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

Always

Below 1 Ω

G131-5 (MCVD) - Body ground

Always

10 kΩ or higher

G131-6 (MCI+) - Body ground

Always

10 kΩ or higher

G131-7 (MCI-) - Body ground

Always

10 kΩ or higher

G131-23 (SGND) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

9.

INSPECT DCM (TELEMATICS TRANSCEIVER)

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

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

G131-5 (MCVD) - Body ground

Ignition switch ON

4 to 6 V

*a

Component with harness connected

(DCM [Telematics Transceiver])

(c) 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

G131-23 (SGND) - Body ground

Always

Below 1 Ω
NG

REPLACE DCM (TELEMATICS TRANSCEIVER)

OK

10.

CHECK MAP LIGHT ASSEMBLY (OUTPUT TO RADIO AND DISPLAY RECEIVER ASSEMBLY)
  • *1: for TMC Made
  • *2: for TMMC Made

(a) Remove the map light assembly with the connector(s) still connected.

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

*A

for TMC Made

*B

for TMMC Made

*a

Component with harness connected

(to Map Light Assembly)

(b) Connect an oscilloscope to terminals 8 (MCO+) and 7 (MCO-) of the P20 map light assembly connector.*1

(c) Connect an oscilloscope to terminals 4 (MCO+) or 6 (MCO-) of the P14 map light assembly connector.*2

(d) Check the signal waveform according to the condition(s) in the table below.

Item

Condition

Measurement terminal

P20-8 (MCO+) - P20-7 (MCO-)*1

P14-4 (MCO+) - P14-6 (MCO-)*2

Tool setting

50 mV/DIV., 500 ms/DIV.

Vehicle condition
  1. Turn the ignition switch to ON.
  2. Sound is input to the map light assembly when the user is closer than 125 mm (4.92 in.) from the map light assembly sound holes.

OK:

The waveform is similar to that shown in the illustration.

HINT:

The oscilloscope waveform shown in the illustration is an example for reference only.

NG

GO TO STEP 5

OK

11.

CHECK DCM (TELEMATICS TRANSCEIVER) (OUTPUT TO RADIO AND DISPLAY RECEIVER ASSEMBLY)

*a

Component with harness connected

(DCM [Telematics Transceiver])

(a) Check the output waveform.

(1) 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

(2) Connect an oscilloscope to terminals 16 (MCO+) and 32 (MCO-) of the G131 DCM (telematics transceiver) connector

(3) Check the signal waveform according to the condition(s) in the table below.

Item

Condition

Measurement terminal

G131-16 (MCO+) - G131-32 (MCO-)

Tool setting

50 mV/DIV., 500 ms/DIV.

Vehicle condition
  1. Ignition switch ON
  2. Sound is input to the map light assembly when the user is closer than 125 mm (4.92 in.) from the map light assembly sound holes.

OK:

The waveform is similar to that shown in the illustration.

HINT:

The oscilloscope waveform shown in the illustration is an example for reference only.

OK

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

NG

REPLACE DCM (TELEMATICS TRANSCEIVER)