| Last Modified: 08-21-2023 | 6.11:8.1.0 | Doc ID: RM100000001PY6S |
| Model Year Start: 2021 | Model: Avalon HV | Prod Date Range: [08/2020 - ] |
| Title: CELLULAR COMMUNICATION: TOYOTA AUDIO MULTIMEDIA SYSTEM: DCM Data Signal Circuit between Navigation ECU and DCM; 2021 - 2022 MY Avalon Avalon HV [08/2020 - ] | ||
|
DCM Data Signal Circuit between Navigation ECU and DCM |
DESCRIPTION
This circuit is used to send and receive signals between the DCM (telematics transceiver), radio and display receiver assembly and navigation ECU.
WIRING DIAGRAM
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER)) |
(a) Disconnect the G124 DCM (telematics transceiver) connector.
(b) Disconnect the G1 radio and display receiver assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
G124-31 (USBG) - G1-11 (USBG) |
Always |
Below 1 Ω |
|
G124-17 (VOT+) - G1-13 (VOR+) |
Always |
Below 1 Ω |
|
G124-15 (USBV) - G1-10 (USBV) |
Always |
Below 1 Ω |
|
G124-33 (VOT-) - G1-14 (VOR-) |
Always |
Below 1 Ω |
|
G124-34 (VOR-) - G1-16 (VOT-) |
Always |
Below 1 Ω |
|
G124-18 (VOR+) - G1-15 (VOT+) |
Always |
Below 1 Ω |
|
G124-31 (USBG) or G1-11 (USBG) - Body ground |
Always |
10 kΩ or higher |
|
G124-17 (VOT+) or G1-13 (VOR+) - Body ground |
Always |
10 kΩ or higher |
|
G124-15 (USBV) or G1-10 (USBV) - Body ground |
Always |
10 kΩ or higher |
|
G124-33 (VOT-) or G1-14 (VOR-) - Body ground |
Always |
10 kΩ or higher |
|
G124-34 (VOR-) or G1-16 (VOT-) - Body ground |
Always |
10 kΩ or higher |
|
G124-18 (VOR+) or G1-15 (VOT+) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
2. |
CHECK HARNESS AND CONNECTOR (NAVIGATION ECU - DCM (TELEMATICS TRANSCEIVER)) |
|
(a) Disconnect the G122 DCM (telematics transceiver) connector. |
|
(b) Disconnect the G113 navigation ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
G122-1 (USB-) - G113-2 (USB-) |
Always |
Below 1 Ω |
|
G122-2 (USB+) - G113-1 (USB+) |
Always |
Below 1 Ω |
|
G122-3 (USBS) - G113-3 (USBS) |
Always |
Below 1 Ω |
|
G122-1 (USB-) or G113-2 (USB-) - Body ground |
Always |
10 kΩ or higher |
|
G122-2 (USB+) or G113-1 (USB+) - Body ground |
Always |
10 kΩ or higher |
|
G122-3 (USBS) or G113-3 (USBS) - 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 |
|
|