Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001MH82
Model Year Start: 2020 Model: RAV4 Prod Date Range: [01/2020 - 10/2022]
Title: CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM: B157213; Microphone Circuit Open; 2020 - 2022 MY RAV4 RAV4 HV [01/2020 - 10/2022]

DTC

B157213

Microphone Circuit Open

DESCRIPTION

This DTC is stored when the DCM (telephone transceiver assembly) detects a malfunction in the telephone microphone assembly circuit.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B157213

Microphone Circuit Open

Current at terminal MCVD is lower than the malfunction threshold for 10 seconds or more while the ignition switch is ON

  • DCM (telephone transceiver assembly)
  • Map light sub-assembly
  • Telephone microphone assembly
  • Harness or connector

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 Safety Connect System.

Click here 2020 - 2022 MY RAV4 RAV4 HV [10/2019 - 10/2022]; CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM: PRECAUTION

PROCEDURE

1.

CHECK DTC

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON and wait for 10 seconds or more.

(d) Turn the Techstream on.

(e) Clear the DTCs.

Click here 2020 - 2022 MY RAV4 RAV4 HV [10/2019 - 10/2022]; CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM: DTC CHECK / CLEAR

Body Electrical > Telematics > Clear DTCs

(f) Check for DTCs and check that no DTCs are output.

Click here 2020 - 2022 MY RAV4 RAV4 HV [10/2019 - 10/2022]; CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM: DTC CHECK / CLEAR

Body Electrical > Telematics > Trouble Codes

OK:

No DTCs are output.

OK

USE SIMULATION METHOD TO CHECK

NG

2.

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

(a) Disconnect the G131 DCM (telephone transceiver assembly) connector.

(b) Disconnect the P20*1 or P14*2 map light sub-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

G131-23 (SGND) - Body ground

Always

10 kΩ or higher

G131-5 (MCVD) or P20-9 (MACC) - Body ground

Always

10 kΩ or higher

G131-6 (MCI+) or P20-8 (MCO+) - Body ground

Always

10 kΩ or higher

G131-7 (MCI-) or P20-7 (MCO-) - Body ground

Always

10 kΩ or higher

for TMMC Made and w/o Panoramic Moon Roof System

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

G131-23 (SGND) - Body ground

Always

10 kΩ or higher

G131-5 (MCVD) or P14-3 (MACC) - Body ground

Always

10 kΩ or higher

G131-6 (MCI+) or P14-4 (MCO+) - Body ground

Always

10 kΩ or higher

G131-7 (MCI-) or P14-6 (MCO-) - Body ground

Always

10 kΩ or higher

for TMMC Made and w/ Panoramic Moon Roof System

Tester Connection

Condition

Specified Condition

G131-5 (MCVD) - P14-7 (MACC)

Always

Below 1 Ω

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

Always

Below 1 Ω

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

Always

Below 1 Ω

G131-23 (SGND) - Body ground

Always

10 kΩ or higher

G131-5 (MCVD) or P14-7 (MACC) - Body ground

Always

10 kΩ or higher

G131-6 (MCI+) or P14-6 (MCO+) - Body ground

Always

10 kΩ or higher

G131-7 (MCI-) or P14-5 (MCO-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

CHECK DCM (TELEPHONE TRANSCEIVER ASSEMBLY) (TELEPHONE MICROPHONE ASSEMBLY POWER SOURCE)

(a) Remove the map light sub-assembly but do not disconnect the connectors.

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

*A

for TMC Made

*B

for TMMC Made and w/o Panoramic Moon Roof System

*C

for TMMC Made and w/ Panoramic Moon Roof System

*a

Component with harness connected

(to Map Light Sub-assembly)

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

Standard Voltage:

for TMC Made

Tester Connection

Switch Condition

Specified Condition

P20-9 (MACC) - Body ground

Ignition switch ON

4 to 6 V

for TMMC Made and w/o Panoramic Moon Roof System

Tester Connection

Switch Condition

Specified Condition

P14-3 (MACC) - Body ground

Ignition switch ON

4 to 6 V

for TMMC Made and w/ Panoramic Moon Roof System

Tester Connection

Switch Condition

Specified Condition

P14-7 (MACC) - Body ground

Ignition switch ON

4 to 6 V

Standard Resistance:

for TMC Made

Tester Connection

Condition

Specified Condition

P14-7 (MCO-) - Body ground

Always

Below 1 Ω

for TMMC Made and w/o Panoramic Moon Roof System

Tester Connection

Condition

Specified Condition

P14-6 (MCO-) - Body ground

Always

Below 1 Ω

for TMMC Made and w/o Panoramic Moon Roof System

Tester Connection

Condition

Specified Condition

P14-5 (MCO-) - Body ground

Always

Below 1 Ω

NG

GO TO STEP 6

OK

4.

INSPECT MAP LIGHT SUB-ASSEMBLY

(a) Remove the map light sub-assembly.

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

*A

for TMC Made

*B

for TMMC Made and w/o Panoramic Moon Roof System

*C

for TMMC Made and w/ Panoramic Moon Roof System

*a

Component without harness connected

(Map Light Sub-assembly [Wire Harness Side])

*b

Component without harness connected

(Map Light Sub-assembly [Telephone Microphone Assembly Side])

(b) Remove the telephone microphone assembly.

Click here 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

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

Standard Resistance:

for TMC Made

Tester Connection

Condition

Specified Condition

9 (MACC) - C-5 (MACC)

Always

Below 1 Ω

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

Always

Below 1 Ω

7 (MCO-) - C-2 (MIC-)

Always

Below 1 Ω

C-5 (MACC) - C-3 (MIC+)

Always

10 kΩ or higher

C-5 (MACC) - C-2 (MIC-)

Always

10 kΩ or higher

C-3 (MIC+) - C-2 (MIC-)

Always

10 kΩ or higher

for TMMC Made and w/o Panoramic Moon Roof System

Tester Connection

Condition

Specified Condition

3 (MACC) - C-5 (MACC)

Always

Below 1 Ω

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

Always

Below 1 Ω

6 (MCO-) - C-2 (MIC-)

Always

Below 1 Ω

C-5 (MACC) - C-3 (MIC+)

Always

10 kΩ or higher

C-5 (MACC) - C-2 (MIC-)

Always

10 kΩ or higher

C-3 (MIC+) - C-2 (MIC-)

Always

10 kΩ or higher

for TMMC Made and w/o Panoramic Moon Roof System

Tester Connection

Condition

Specified Condition

7 (MACC) - C-5 (MACC)

Always

Below 1 Ω

6 (MCO+) - C-3 (MIC+)

Always

Below 1 Ω

5 (MCO-) - C-2 (MIC-)

Always

Below 1 Ω

C-5 (MACC) - C-3 (MIC+)

Always

10 kΩ or higher

C-5 (MACC) - C-2 (MIC-)

Always

10 kΩ or higher

C-3 (MIC+) - C-2 (MIC-)

Always

10 kΩ or higher

NG

REPLACE MAP LIGHT SUB-ASSEMBLY

OK

5.

CHECK TELEPHONE MICROPHONE ASSEMBLY

(a) Replace the telephone microphone assembly with a normal one and check if the same problem occurs again.

Click here 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

OK:

The system returns to normal.

(b) Clear the DTCs.

Click here 2020 - 2022 MY RAV4 RAV4 HV [10/2019 - 10/2022]; CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM: DTC CHECK / CLEAR

Body Electrical > Telematics > Clear DTCs

(c) Recheck for DTCs and check that no DTCs are output.

Click here 2020 - 2022 MY RAV4 RAV4 HV [10/2019 - 10/2022]; CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM: DTC CHECK / CLEAR

Body Electrical > Telematics > Trouble Codes

OK:

No DTCs are output.

OK

END (TELEPHONE MICROPHONE ASSEMBLY IS DEFECTIVE)

NG

GO TO STEP 6

6.

REPLACE DCM (TELEPHONE TRANSCEIVER ASSEMBLY)

(a) Replace the DCM (telephone transceiver assembly) with a new one.

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

NOTICE:

  • The ignition switch must be off.
  • Do not exchange the DCM (telephone transceiver assembly) with one from another vehicle.
NEXT

PERFORM DCM ACTIVATION