| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM1000000026PH3 |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [09/2022 - ] |
| Title: TELEMATICS: TELEMATICS SYSTEM (for Gasoline Model): DCM Data Signal Circuit between Radio Receiver and DCM; 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [09/2022 - ] | ||
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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. |
CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - RADIO AND DISPLAY RECEIVER ASSEMBLY) |
(a) Disconnect the I143 and t7 DCM (telematics transceiver) connector.
(b) Disconnect the I175 and t8 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 |
|---|---|---|
|
I143-15 (USBV) - I175-18 (USBV) |
Always |
Below 1 Ω |
|
I143-31 (USBG) - I175-17 (USBG) |
Always |
Below 1 Ω |
|
I143-17 (VOT+) - I175-15 (VOR+) |
Always |
Below 1 Ω |
|
I143-33 (VOT-) - I175-16 (VOR-) |
Always |
Below 1 Ω |
|
t7-2 (USB+) - t8-1 (USB+) |
Always |
Below 1 Ω |
|
t7-1 (USB-) - t8-2 (USB-) |
Always |
Below 1 Ω |
|
t7-3 (USBS) - t8-3 (USBS) |
Always |
Below 1 Ω |
|
I143-15 (USBV) or I175-18 (USBV) - Body ground |
Always |
10 kΩ or higher |
|
I143-31 (USBG) or I175-17 (USBG) - Body ground |
Always |
10 kΩ or higher |
|
I143-17 (VOT+) or I175-15 (VOR+) - Body ground |
Always |
10 kΩ or higher |
|
I143-33 (VOT-) or I175-16 (VOR-) - Body ground |
Always |
10 kΩ or higher |
|
I175-4 (SGND) - Body ground |
Always |
10 kΩ or higher |
|
t7-2 (USB+) or t8-1 (USB+) - Body ground |
Always |
10 kΩ or higher |
|
t7-1 (USB-) or t8-2 (USB-) - Body ground |
Always |
10 kΩ or higher |
|
t7-3 (USBS) or t8-3 (USBS) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE
|
![2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022]; TELEMATICS: TELEMATICS SYSTEM (for Gasoline Model): PROBLEM SYMPTOMS TABLE](/t3Portal/stylegraphics/info.gif)
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|