Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001EH0B
Model Year Start: 2019 Model: RAV4 Prod Date Range: [11/2018 - 10/2019]
Title: CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM: B1572; Telephone Microphone Error; 2019 MY RAV4 RAV4 HV [11/2018 - 10/2019]

DTC

B1572

Telephone Microphone Error

DESCRIPTION

This DTC is set when the DCM (Telephone Transceiver Assembly) detects a malfunction in the telephone microphone assembly circuit.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B1572

Telephone Microphone Error

Current of MCVD reaches malfunction criteria for 10 seconds while ignition switch is ON.
  • Harness or connector
  • Telephone microphone assembly
  • Map light sub-assembly
  • DCM (Telephone Transceiver Assembly)

WIRING DIAGRAM

CAUTION / NOTICE / HINT

HINT:

Before performing this diagnostic procedure, make sure to perform Health Check and confirm that the DCM/VIN registration information is correct.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 10/2019]; CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM: HEALTH CHECK

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.

(d) Turn the Techstream on.

(e) Clear the DTCs.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 10/2019]; CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM: DTC CHECK / CLEAR

Body Electrical > Telematics > Clear DTCs

(f) Recheck for DTCs.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 10/2019]; CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM: DTC CHECK / CLEAR

Body Electrical > Telematics > Trouble Codes

Result

Proceed to

DTC B1572 is output

A

DTC B1572 is not output

B
B

CHECK FOR INTERMITTENT PROBLEMS

A

2.

CHECK MAP LIGHT SUB-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

*a

Component with harness connected

(to Map Light 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

P14-7 (MACC) - Body ground

Ignition switch ACC

4 to 6 V

for TMMC Made:

Tester Connection

Switch Condition

Specified Condition

P14-3 (MACC) - Body ground

Ignition switch ACC

4 to 6 V

Standard Resistance:

for TMC Made:

Tester Connection

Condition

Specified Condition

P14-5 (MCO-) - Body ground

Always

Below 1 Ω

for TMMC Made:

Tester Connection

Condition

Specified Condition

P14-4 (MCO-) - Body ground

Always

Below 1 Ω
NG

GO TO STEP 7

OK

3.

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

(a) Disconnect the G9 DCM (Telephone Transceiver Assembly) connector.

(b) Disconnect the P14 map light sub-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

G9-34 (MCI+) - P14-6 (MCO+)

Always

Below 1 Ω

G9-34 (MCI+) or P14-6 (MCO+) - Body ground

Always

10 kΩ or higher

G9-35 (MCI-) - P14-5 (MCO-)

Always

Below 1 Ω

G9-35 (MCI-) or P14-5 (MCO-) - Body ground

Always

10 kΩ or higher

G9-32 (SGND) - Body ground

Always

10 kΩ or higher

for TMMC Made:

Tester Connection

Condition

Specified Condition

G9-34 (MCI+) - P14-6 (MCO+)

Always

Below 1 Ω

G9-34 (MCI+) or P14-6 (MCO+) - Body ground

Always

10 kΩ or higher

G9-35 (MCI-) - P14-4 (MCO-)

Always

Below 1 Ω

G9-35 (MCI-) or P14-4 (MCO-) - Body ground

Always

10 kΩ or higher

G9-32 (SGND) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
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

(b) Remove the telephone microphone assembly.

Click here 2019 - 2021 MY RAV4 RAV4 HV [11/2018 - 12/2021]; 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

A-7 (MACC) - B-5 (MACC)

Always

Below 1 Ω

A-6 (MCO+) - B-3 (MIC+)

Always

Below 1 Ω

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

Always

Below 1 Ω

A-7 (MACC) - A-6 (MCO+)

Always

10 kΩ or higher

A-7 (MACC) - A-5 (MCO-)

Always

10 kΩ or higher

A-6 (MCO+) - A-5 (MCO-)

Always

10 kΩ or higher

for TMMC Made:

Tester Connection

Condition

Specified Condition

A-3 (MACC) - B-5 (MACC)

Always

Below 1 Ω

A-6 (MCO+) - B-3 (MIC+)

Always

Below 1 Ω

A-4 (MCO-) - B-2 (MIC-)

Always

Below 1 Ω

A-3 (MACC) - A-6 (MCO+)

Always

10 kΩ or higher

A-3 (MACC) - A-4 (MCO-)

Always

10 kΩ or higher

A-6 (MCO+) - A-4 (MCO-)

Always

10 kΩ or higher

*A

for TMC Made

*B

for TMMC Made

*a

Component with harness connected

(to Map Light Assembly)
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

OK:

The system returns to normal.

(b) Clear the DTCs.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 10/2019]; 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 2019 MY RAV4 RAV4 HV [11/2018 - 10/2019]; 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

6.

REPLACE DCM (TELEPHONE TRANSCEIVER ASSEMBLY)

(a) Replace the DCM (Telephone Transceiver Assembly).

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 10/2019]; 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

7.

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

(a) Remove the DCM (Telephone Transceiver Assembly) but do not disconnect the connectors.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 10/2019]; CELLULAR COMMUNICATION: DCM(TELEMATICS TRANSCEIVER): REMOVAL

*a

Component with harness connected

(DCM (Telephone Transceiver Assembly))

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

G9-33 (MCVD) - Body ground

Ignition switch ACC

4 to 6 V

Standard Resistance:

Tester Connection

Condition

Specified Condition

G9-35 (MCI-) - Body ground

Always

Below 1 Ω
OK

REPAIR OR REPLACE HARNESS OR CONNECTOR
NG

8.

REPLACE DCM (TELEPHONE TRANSCEIVER ASSEMBLY)

(a) Replace the DCM (Telephone Transceiver Assembly).

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 10/2019]; 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