Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM1000000027O8E
Model Year Start: 2023 Model: RAV4 Prod Date Range: [10/2022 -           ]
Title: TELEMATICS: TELEMATICS SYSTEM: DCM Data Signal Circuit between Radio Receiver and DCM; 2023 - 2024 MY RAV4 RAV4 HV [10/2022 -        ]

DCM Data Signal Circuit between Radio Receiver and DCM

DESCRIPTION

This circuit is used to send and receive signals between the DCM (telematics transceiver) and the radio and display receiver assembly.

WIRING DIAGRAM

PROCEDURE

1.

INSPECT TELEPHONE ECU WIRE (TO TRANSCEIVER)

(a) Disconnect the telephone ECU wire (to Transceiver) connector from the telephone ECU wire.

*a

Front view of wire harness connector

(to Telephone ECU Wire)

*b

Front view of wire harness connector

(to DCM (Telematics Transceiver))

(b) Disconnect the telephone ECU wire (to Transceiver) connector from the DCM (telematics transceiver).

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

B-1 - A-2 (USB+)

Always

Below 1 Ω

B-2 - A-1 (USB-)

Always

Below 1 Ω

B-3 - A-3 (USBS)

Always

Below 1 Ω

B-1 or A-2 (USB+) - Body ground

Always

10 kΩ or higher

B-2 or A-1 (USB-) - Body ground

Always

10 kΩ or higher

B-3 or A-3 (USBS) - Body ground

Always

10 kΩ or higher
NG

REPLACE TELEPHONE ECU WIRE (TO TRANSCEIVER)

OK

2.

INSPECT TELEPHONE ECU WIRE

(a) Disconnect the telephone ECU wire connector from the radio and display receiver assembly.

*a

Front view of wire harness connector

(to Radio and Display Receiver Assembly)

*b

Front view of wire harness connector

(to Telephone ECU Wire (to Transceiver))

(b) Disconnect the telephone ECU wire connector from the telephone ECU wire (to transceiver).

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

C-1 (USB+) - B-1

Always

Below 1 Ω

C-2 (USB-) - B-2

Always

Below 1 Ω

C-3 (USBS) - B-3

Always

Below 1 Ω

C-1 (USB+) or B-1 - Body ground

Always

10 kΩ or higher

C-2 (USB-) or B-2 - Body ground

Always

10 kΩ or higher

C-3 (USBS) or B-3 - Body ground

Always

10 kΩ or higher
NG

REPLACE TELEPHONE ECU WIRE

OK

3.

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

(a) Disconnect the G138 radio and display receiver assembly.

(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

G138-18 (USBV) - G131-15 (USBV)

Always

Below 1 Ω

G138-17 (USBG) - G131-31 (USBG)

Always

Below 1 Ω

G138-18 (USBV) - Body ground

Always

10 kΩ or higher

G138-17 (USBG) - Body ground

Always

10 kΩ or higher
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR