DCM Data Signal Circuit between Navigation ECU and DCM [06/2018 - 10/2019]: Procedure

CHECK MODEL

Choose the model to be inspected.

Result

Result	Proceed to
w/o Navigation System	A
w/ Navigation System	B

Result:

B

See step 3

Result:

A

See step 2

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

Disconnect the G109 DCM (Telematics Transceiver) connector.

GTY775813

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to DCM (Telematics Transceiver))

Disconnect the G2 and G119 radio receiver assembly connectors.

GTY828848

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to Radio Receiver Assembly)

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

Standard Resistance

Tester Connection	Condition	Specified Condition
G109-1 (USB-) - G119-2 (USB-)	Always	Below 1 Ω
G109-2 (USB+) - G119-1 (USB+)	Always	Below 1 Ω
G109-6 (USBS) - G119-3 (USBS)	Always	Below 1 Ω
G109-3 (USBG) - G2-11 (USBG)	Always	Below 1 Ω
G109-4 (VOT+) - G2-13 (VOR+)	Always	Below 1 Ω
G109-5 (USBV) - G2-10 (USBV)	Always	Below 1 Ω
G109-7 (VOT-) - G2-14 (VOR-)	Always	Below 1 Ω
G109-8 (VOR-) - G2-16 (VOT-)	Always	Below 1 Ω
G109-9 (VOR+) - G2-15 (VOT+)	Always	Below 1 Ω
G109-1 (USB-) or G119-2 (USB-) - Body ground	Always	10 kΩ or higher
G109-2 (USB+) or G119-1 (USB+) - Body ground	Always	10 kΩ or higher
G109-6 (USBS) or G119-3 (USBS) - Body ground	Always	10 kΩ or higher
G109-3 (USBG) or G2-11 (USBG) - Body ground	Always	10 kΩ or higher
G109-4 (VOT+) or G2-13 (VOR+) - Body ground	Always	10 kΩ or higher
G109-5 (USBV) or G2-10 (USBV) - Body ground	Always	10 kΩ or higher
G109-7 (VOT-) or G2-14 (VOR-) - Body ground	Always	10 kΩ or higher
G109-8 (VOR-) or G2-16 (VOT-) - Body ground	Always	10 kΩ or higher
G109-9 (VOR+) or G2-15 (VOT+) - 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 [06/2018 - 10/2019]

Result:

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

Disconnect the G109 DCM (Telematics Transceiver) connector.
Disconnect the G1 radio receiver assembly connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
G109-3 (USBG) - G1-11 (USBG)	Always	Below 1 Ω
G109-4 (VOT+) - G1-13 (VOR+)	Always	Below 1 Ω
G109-5 (USBV) - G1-10 (USBV)	Always	Below 1 Ω
G109-7 (VOT-) - G1-14 (VOR-)	Always	Below 1 Ω
G109-8 (VOR-) - G1-16 (VOT-)	Always	Below 1 Ω
G109-9 (VOR+) - G1-15 (VOT+)	Always	Below 1 Ω
G109-3 (USBG) or G1-11 (USBG) - Body ground	Always	10 kΩ or higher
G109-4 (VOT+) or G1-13 (VOR+) - Body ground	Always	10 kΩ or higher
G109-5 (USBV) or G1-10 (USBV) - Body ground	Always	10 kΩ or higher
G109-7 (VOT-) or G1-14 (VOR-) - Body ground	Always	10 kΩ or higher
G109-8 (VOR-) or G1-16 (VOT-) - Body ground	Always	10 kΩ or higher
G109-9 (VOR+) or G1-15 (VOT+) - Body ground	Always	10 kΩ or higher

Result

Proceed to
OK
NG

Result:

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result:

OK

See step 4

CHECK HARNESS AND CONNECTOR (NAVIGATION ECU - DCM (TELEMATICS TRANSCEIVER))

Disconnect the G109 DCM (Telematics Transceiver) connector.

GTY824705

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to DCM (Telematics Transceiver))
*b	Front view of wire harness connector (to Navigation ECU)

Disconnect the G108 navigation ECU connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
G109-1 (USB-) - G108-2 (USB-)	Always	Below 1 Ω
G109-2 (USB+) - G108-1 (USB+)	Always	Below 1 Ω
G109-6 (USBS) - G108-3 (USBS)	Always	Below 1 Ω
G109-1 (USB-) or G108-2 (USB-) - Body ground	Always	10 kΩ or higher
G109-2 (USB+) or G108-1 (USB+) - Body ground	Always	10 kΩ or higher
G109-6 (USBS) or G108-3 (USBS) - 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 [06/2018 - 10/2019]

Result:

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR