Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: 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 receiver assembly and navigation ECU.
WIRING DIAGRAM
PROCEDURE
| 1. | CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - DCM (TELEMATICS TRANSCEIVER)) |
(a) Disconnect the J157 DCM (Telematics Transceiver) connector.
(b) Disconnect the J149 radio receiver assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| J157-31 (USBG) - J149-11 (USBG) | Always | Below 1 Ω |
| J157-17 (VOT+) - J149-13 (VOR+) | Always | Below 1 Ω |
| J157-15 (USBV) - J149-10 (USBV) | Always | Below 1 Ω |
| J157-17 (VOT-) - J149-14 (VOR-) | Always | Below 1 Ω |
| J157-34 (VOR-) - J149-16 (VOT-) | Always | Below 1 Ω |
| J157-18 (VOR+) - J149-15 (VOT+) | Always | Below 1 Ω |
| J157-31 (USBG) or J149-11 (USBG) - Body ground | Always | 10 kΩ or higher |
| J157-17 (VOT+) or J149-13 (VOR+) - Body ground | Always | 10 kΩ or higher |
| J157-15 (USBV) or J149-10 (USBV) - Body ground | Always | 10 kΩ or higher |
| J157-17 (VOT-) or J149-14 (VOR-) - Body ground | Always | 10 kΩ or higher |
| J157-34 (VOR-) or J149-16 (VOT-) - Body ground | Always | 10 kΩ or higher |
| J157-18 (VOR+) or J149-15 (VOT+) - Body ground | Always | 10 kΩ or higher |
| NG | .gif) | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
.gif)
| 2. | CHECK HARNESS AND CONNECTOR (NAVIGATION ECU - DCM (TELEMATICS TRANSCEIVER)) |
| (a) Disconnect the J157 DCM (Telematics Transceiver) connector. |
|
(b) Disconnect the J153 navigation ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| J157-1 (USB-) - J153-2 (USB-) | Always | Below 1 Ω |
| J157-2 (USB+) - J153-1 (USB+) | Always | Below 1 Ω |
| J157-3 (USBS) - J153-3(USBS) | Always | Below 1 Ω |
| J157-1 (USB-) or J153-2 (USB-) - Body ground | Always | 10 kΩ or higher |
| J157-2 (USB+) or J153-1 (USB+) - Body ground | Always | 10 kΩ or higher |
| J157-3 (USBS) or J153-3 (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 |
Does not Recognize Voice Commands Performed to Contact Support Center
PROCEDURE 1. CHECK COMMUNICATION BASED VOICE RECOGNITION FUNCTION (a) While paying attention to the condition of the spoken voice command, say "Find a gas station in New York" and check that ...
Manual(sos)switch
ComponentsCOMPONENTS ILLUSTRATION *1 MANUAL (SOS) SWITCH (MAP LIGHT ASSEMBLY) - - ...
Other materials:
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Road Sign Assist System: Dtc Check / Clear
DTC CHECK / CLEAR CHECK FOR DTC (a) Connect the Techstream to the DLC3. (b) Turn the engine switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Road Sign Assist / Trouble Codes. Body Electrical > Road Sign Assist > Trouble Codes (e) Check for DTCs (Test ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Audio And Visual System (for 8 Inch Display): Touch Pad Memory Module Malfunction (B155B)
DESCRIPTION This DTC is stored if the remote touch (remote operation controller assembly) detects a malfunction in itself, such as internal hardware failure or remote touch screen memory module malfunction. DTC No. Detection Item DTC Detection Condition Trouble Area B155B Touch Pad Me ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
- For your information
- Pictorial index
- For safety and security
- Instrument cluster
- Operation of each component
- Driving
- Lexus Display Audio system
- Interior features
- Maintenance and care
- When trouble arises
- Vehicle specifications
- For owners
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
0.0128