Lexus NX: DCM Data Signal Circuit between Navigation ECU and DCM
DESCRIPTION
This circuit is used to send and receive signals between the DCM (telematics transceiver) and radio receiver assembly.
WIRING DIAGRAM
PROCEDURE
| 1. | CHECK HARNESS AND CONNECTOR (DCM [TELEMATICS TRANSCEIVER] - RADIO RECEIVER ASSEMBLY) |
(a) Disconnect the I153 radio receiver assembly connector.
(b) Disconnect the I183 DCM (telematics transceiver) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| I153-10 (USBV) - I183-15 (USBV) | Always | Below 1 Ω |
| I153-11 (USBG) - I183-31 (USBG) | Always | Below 1 Ω |
| I153-15 (VOT+) - I183-18 (VOR+) | Always | Below 1 Ω |
| I153-16 (VOT-) - I183-34 (VOR-) | Always | Below 1 Ω |
| I153-13 (VOR+) - I183-17 (VOT+) | Always | Below 1 Ω |
| I153-14 (VOR-) - I183-33 (VOT-) | Always | Below 1 Ω |
| I153-10 (USBV) - Body ground | Always | 10 kΩ or higher |
| I153-11 (USBG) - Body ground | Always | 10 kΩ or higher |
| I153-15 (VOT+) - Body ground | Always | 10 kΩ or higher |
| I153-16 (VOT-) - Body ground | Always | 10 kΩ or higher |
| I153-13 (VOR+) - Body ground | Always | 10 kΩ or higher |
| I153-14 (VOR-) - Body ground | Always | 10 kΩ or higher |
| I153-12 (SGND) - Body ground | Always | 10 kΩ or higher |
| NG | .gif) | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
.gif)
| 2. | CHECK HARNESS AND CONNECTOR (DCM [TELEMATICS TRANSCEIVER] - NAVIGATION ECU) |
| (a) Disconnect the I176 navigation ECU connector. |
|
(b) Disconnect the I185 DCM (telematics transceiver) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| I176-1 (USB+) - I185-2 (USB+) | Always | Below 1 Ω |
| I176-2 (USB-) - I185-1 (USB-) | Always | Below 1 Ω |
| I176-3 (USBS) - I185-3 (USBS) | Always | Below 1 Ω |
| I176-1 (USB+) - Body ground | Always | 10 kΩ or higher |
| I176-2 (USB-) - Body ground | Always | 10 kΩ or higher |
| I176-3 (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 |
READ NEXT:
Manual(sos)switch
InspectionINSPECTION PROCEDURE 1. REMOVE MAP LIGHT ASSEMBLY Click here 2. INSPECT MAP LIGHT ASSEMBLY (a) Check the resistance. (1) Measure the resistance according to the value(s) in the table belo
Components
COMPONENTS ILLUSTRATION *1 DECK FLOOR BOX LH *2 NO. 3 DECK BOARD SUB-ASSEMBLY *3 REAR DECK FLOOR BOX *4 NEGATIVE AUXILIARY BATTERY TERMINAL N*m (kgf*cm, ft.*lbf): Specified
SEE MORE:
Pictorial index
Exterior
The shape of the headlights may differ depending on the grade, etc.
Side doors
Locking/unlocking
Opening/closing the side windows
Locking/unlocking by using the mechanical key
Warning messages
Back door
Opening from inside the cabin*
Opening from outside
Warning mes
Components
COMPONENTS ILLUSTRATION *1 FRONT INNER SEAT CUSHION SHIELD LH *2 FRONT LOWER SEAT CUSHION SHIELD *3 FRONT SEAT CUSHION SHIELD LH *4 FRONT SEAT HEADREST SUPPORT *5 SEPARATE TYPE FRONT SEATBACK COVER WITH PAD *6 HOG RING N*m (kgf*cm, ft.*lbf): Specified torque â—
