Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2020RAV4 XLE, AWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTINFOTAINMENTTOYOTA ENTUNE SYSTEM - DIAGNOSTICS & SYMPTOM TESTSTOYOTA ENTUNE SYSTEMDCM DATA SIGNAL CIRCUIT BETWEEN RADIO RECEIVER AND DCM [11/2018 - 10/2019]PROCEDURE
2020 Toyota RAV4 XLE, AWD
DCM Data Signal Circuit between Radio Receiver and DCM [11/2018 - 10/2019]: Procedure
2020 Toyota RAV4 XLE, AWDSECTION Procedure
- CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - TELEPHONE ANTENNA CORD (TELEPHONE ECU WIRE (TO TRANSCEIVER)))
- Disconnect the G1 radio and display receiver assembly connector.
- Disconnect the GG5 telephone antenna cord (telephone ECU wire (to Transceiver)) connector.
- Measure the resistance according to the value (s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition G1-10 (USBV) - GG5-5 (USBV) Always Below 1 Ω G1-11 (USBG) - GG5-3 (USBG) Always Below 1 Ω G1-15 (VOT+) - GG5-4 (VOR+) Always Below 1 Ω G1-16 (VOT-) - GG5-8 (VOR-) Always Below 1 Ω G1-13 (VOR+) - GG5-10 (VOT+) Always Below 1 Ω G1-14 (VOR-) - GG5-9 (VOT-) Always Below 1 Ω G1-12 (SGND) - GG5-1 (SG) Always Below 1 Ω G1-10 (USBV) - Body ground Always 10 kΩ or higher G1-11 (USBG) - Body ground Always 10 kΩ or higher G1-15 (VOT+) - Body ground Always 10 kΩ or higher G1-16 (VOT-) - Body ground Always 10 kΩ or higher G1-13 (VOR+) - Body ground Always 10 kΩ or higher G1-14 (VOR-) - Body ground Always 10 kΩ or higher G1-12 (SGND) - Body ground Always 10 kΩ or higher *a Front view of wire harness connector
(to Radio and Display Receiver Assembly)*b Front view of wire harness connector
(to Telephone Antenna Cord (Telephone ECU Wire (to Transceiver)))Result
Proceed to OK NG
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 2
- CHECK TELEPHONE ANTENNA CORD (TELEPHONE ECU WIRE (TO TRANSCEIVER))
- Disconnect the G123 telephone antenna cord (telephone ECU wire (to Transceiver)) connector from the DCM (telephone transceiver assembly).
*a Front view of wire harness connector
(to DCM (Telephone Transceiver Assembly))*b Front view of wire harness connector
(to Wire Harness) - Disconnect the GG5 telephone antenna cord (telephone ECU wire (to Transceiver)) connector from the wire harness.
- Measure the resistance according to the value (s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition G123-5 (USBV) - GG5-5 (USBV) Always Below 1 Ω G123-3 (USBG) - GG5-3 (USBG) Always Below 1 Ω G123-9 (VOR+) - GG5-4 (VOR+) Always Below 1 Ω G123-8 (VOR-) - GG5-8 (VOR-) Always Below 1 Ω G123-4 (VOT+) - GG5-10 (VOT+) Always Below 1 Ω G123-7 (VOT-) - GG5-9 (VOT-) Always Below 1 Ω G123-5 (USBV) - Body ground Always 10 kΩ or higher G123-3 (USBG) - Body ground Always 10 kΩ or higher G123-9 (VOR+) - Body ground Always 10 kΩ or higher G123-8 (VOR-) - Body ground Always 10 kΩ or higher G123-4 (VOT+) - Body ground Always 10 kΩ or higher G123-7 (VOT-) - Body ground Always 10 kΩ or higher Result
Proceed to OK NG
Result:
NG
REPLACE TELEPHONE ANTENNA CORD (TELEPHONE ECU WIRE (TO TRANSCEIVER)). Refer to REMOVAL [11/2018 - 10/2019]
Result:
OK
See step 3
- Disconnect the G123 telephone antenna cord (telephone ECU wire (to Transceiver)) connector from the DCM (telephone transceiver assembly).
- CHECK TELEPHONE ANTENNA CORD (TELEPHONE ECU WIRE (TO TRANSCEIVER))
- Disconnect the G123 telephone antenna cord (telephone ECU wire (to transceiver)) connector from the DCM (telephone transceiver assembly).
*a Front view of wire harness connector
(to DCM (Telephone Transceiver Assembly))*b Front view of wire harness connector
(to Telephone Antenna Cord (Telephone ECU Wire)) - Disconnect the GG7 telephone antenna cord (telephone ECU wire (to transceiver)) connector from the telephone antenna cord (telephone ECU wire).
- Measure the resistance according to the value (s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition G123-2 (USB+) - GG7-1 Always Below 1 Ω G123-1 (USB-) - GG7-2 Always Below 1 Ω G123-6 (USBS) - GG7-3 Always Below 1 Ω G123-2 (USB+) - Body ground Always 10 kΩ or higher G123-1 (USB-) - Body ground Always 10 kΩ or higher G123-6 (USBS) - Body ground Always 10 kΩ or higher Result
Proceed to OK NG
Result:
NG
REPLACE TELEPHONE ANTENNA CORD (TELEPHONE ECU WIRE (TO TRANSCEIVER)). Refer to REMOVAL [11/2018 - 10/2019]
Result:
OK
See step 4
- Disconnect the G123 telephone antenna cord (telephone ECU wire (to transceiver)) connector from the DCM (telephone transceiver assembly).
- CHECK TELEPHONE ANTENNA CORD (TELEPHONE ECU WIRE)
- Disconnect the GG7 telephone antenna cord (telephone ECU wire) connector from the telephone antenna cord (telephone ECU wire (to transceiver)).
*a Front view of wire harness connector
(to Telephone Antenna Cord (Telephone ECU Wire (to Transceiver)))*b Front view of wire harness connector
(to Radio and display receiver assembly) - Disconnect the G130 telephone antenna cord (telephone ECU wire) connector from the radio and display receiver assembly.
- Measure the resistance according to the value (s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition GG7-2 - G130-1 (US4+) Always Below 1 Ω GG7-1 - G130-2 (US4-) Always Below 1 Ω GG7-3 - G130-3 (UGD4) Always Below 1 Ω G130-2 (US4+) - Body ground Always 10 kΩ or higher G130-1 (US4-) - Body ground Always 10 kΩ or higher G130-3 (UGD4) - Body ground Always 10 kΩ or higher Result
Proceed to OK NG
Result:
OK
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE [11/2018 - 02/2019] , or refer to PROBLEM SYMPTOMS TABLE [02/2019 - 10/2019]
Result:
NG
REPLACE TELEPHONE ANTENNA CORD (TELEPHONE ECU WIRE). Refer to REMOVAL [11/2018 - 10/2019]
- Disconnect the GG7 telephone antenna cord (telephone ECU wire) connector from the telephone antenna cord (telephone ECU wire (to transceiver)).
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.