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 |
|
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| 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:
Panel Switches do not Function
CAUTION / NOTICE / HINT NOTICE: When replacing the radio receiver assembly, always replace it with a new one. If a radio receiver assembly which was installed to another vehicle is used, the following may occur:
A communication malfunction DTC may be stored.
The radio receiver assembly may not
Precaution
PRECAUTION HANDLING PRECAUTIONS (a) For safety, when driving the vehicle, the driver should not operate a portable device that is charging. (b) Anyone using an implanted pacemaker, biventricular pacing pulse generator, cardiac defibrillator or other medical electrical device should consult with thei
