Lexus RX (RX 350L, RX450h) 2016-2026 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) 2016-2026 Repair Manual > Lighting System (w/ Automatic Headlight Beam Level Control System): Parts Location
PARTS LOCATION ILLUSTRATION *A w/ Automatic High Beam System *B w/ Front Fog Light *1 HEADLIGHT ASSEMBLY LH - NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH - HEADLIGHT UNIT LH *2 HEADLIGHT ASSEMBLY RH - NO. 1 HEADLIGHT ECU SUB-ASSEMBLY RH - HEADLIGHT UNIT RH *3 FOG LIGHT ASSEMBLY LH ...
Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Air Conditioning System: Air Outlet Damper Control Servo Motor Circuit (B1443/43)
DESCRIPTION The No. 3 air conditioning radiator damper servo sub-assembly sends pulse signals to inform the air conditioning amplifier assembly of the damper position. The air conditioning amplifier assembly activates the motor (normal or reverse) based on these signals to move the No. 3 air conditi ...
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
0.01