Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001EGZR
Model Year Start: 2019 Model: RAV4 Prod Date Range: [11/2018 - 10/2019]
Title: CELLULAR COMMUNICATION: SAFETY CONNECT SYSTEM: B15C4; Airbag Signal Malfunction/Not Input; 2019 MY RAV4 RAV4 HV [11/2018 - 10/2019]

DTC

B15C4

Airbag Signal Malfunction/Not Input

DESCRIPTION

If the DCM (Telephone Transceiver Assembly) detects an error in communication between the DCM (Telephone Transceiver Assembly) and the airbag ECU assembly as a result of the DCM (Telephone Transceiver Assembly) self check, this DTC will be set.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B15C4

Airbag Signal Malfunction/Not Input

DCM (Telephone Transceiver Assembly) detects an error in signals from airbag ECU assembly when ignition switch is ON.
  • Airbag system
  • Harness or connector
  • Airbag ECU assembly
  • DCM (Telephone Transceiver Assembly)

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

The vehicle is equipped with an SRS (Supplemental Restraint System) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the Precaution in the SRS.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM (w/ Occupant Classification System): PRECAUTION 2019 - 2020 MY RAV4 RAV4 HV [02/2019 - 08/2020]; SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM (w/ Occupant Classification System): PRECAUTION

PROCEDURE

1.

CHECK DTC (AIRBAG SYSTEM)

(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 - 2020 MY RAV4 RAV4 HV [11/2018 - 08/2020]; SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM (w/ Occupant Classification System): DTC CHECK / CLEAR

Body Electrical > SRS Airbag > Clear DTCs

(f) Recheck for DTCs.

Click here 2019 - 2020 MY RAV4 RAV4 HV [11/2018 - 08/2020]; SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM (w/ Occupant Classification System): DTC CHECK / CLEAR

Body Electrical > SRS Airbag > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTCs are output

B
B

GO TO AIRBAG SYSTEM 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM (w/ Occupant Classification System): DIAGNOSTIC TROUBLE CODE CHART 2019 - 2020 MY RAV4 RAV4 HV [02/2019 - 08/2020]; SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM (w/ Occupant Classification System): DIAGNOSTIC TROUBLE CODE CHART

A

2.

CHECK DCM (TELEPHONE TRANSCEIVER ASSEMBLY) (GSW SIGNAL)

(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 according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

G9-24 (GSW) - Body ground

Ignition switch ON

6.5 to 8.5 V

Reference Waveform:

Item

Condition

Tester connection

G9-24 (GSW) - Body ground

Tool setting

5.0 V/DIV., 20 ms/DIV.

Vehicle condition

Ignition switch ON

Result

Proceed to

8.5 V or higher

A

Below 6.5 V

B

6.5 to 8.5 V

C
B

GO TO STEP 4

C

GO TO STEP 5

A

3.

CHECK HARNESS AND CONNECTOR (FOR OPEN CIRCUIT)

(a) Remove the airbag ECU assembly but do not disconnect the connectors.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: REMOVAL 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: REMOVAL

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

G70-23 (GSW3) - Body ground

Ignition switch ON

8.5 V or higher

Reference Waveform:

Item

Condition

Tester connection

G70-23 (GSW3) - Body ground

Tool setting

5.0 V/DIV., 20 ms/DIV.

Vehicle condition

Ignition switch ON

*a

Component with harness connected

(Airbag ECU Assembly)
OK

REPLACE AIRBAG ECU ASSEMBLY 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: REMOVAL 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.

CHECK HARNESS AND CONNECTOR (FOR SHORT CIRCUIT)

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

(b) Disconnect the G70 airbag ECU assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G9-24 (GSW) - Body ground

Always

10 kΩ or higher

G70-23 (GSW3) - Body ground

Always

10 kΩ or higher
NG

GO TO STEP 6

OK

5.

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 swap the DCM (Telephone Transceiver Assembly) with one from another vehicle.
NEXT

PERFORM DCM ACTIVATION

6.

CHECK HARNESS AND CONNECTOR (DCM (TELEPHONE TRANSCEIVER ASSEMBLY) - AIRBAG ECU ASSEMBLY)

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

(b) Disconnect the G70 airbag ECU assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G9-24 (GSW) - G70-23 (GSW3)

Always

Below 1 Ω

G9-24 (GSW) or G70-23 (GSW3) - Body ground

Always

10 kΩ or higher
OK

REPLACE AIRBAG ECU ASSEMBLY 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: REMOVAL 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: REMOVAL

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR