Lexus ES: 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 G128 DCM (Telematics Transceiver) connector.
(b) Disconnect the G1 radio receiver assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| G128-31 (USBG) - G1-11 (USBG) | Always | Below 1 Ω |
| G128-17 (VOT+) - G1-13 (VOR+) | Always | Below 1 Ω |
| G128-15 (USBV) - G1-10 (USBV) | Always | Below 1 Ω |
| G128-33 (VOT-) - G1-14 (VOR-) | Always | Below 1 Ω |
| G128-34 (VOR-) - G1-16 (VOT-) | Always | Below 1 Ω |
| G128-18 (VOR+) - G1-15 (VOT+) | Always | Below 1 Ω |
| G128-31 (USBG) or G1-11 (USBG) - Body ground | Always | 10 kΩ or higher |
| G128-17 (VOT+) or G1-13 (VOR+) - Body ground | Always | 10 kΩ or higher |
| G128-15 (USBV) or G1-10 (USBV) - Body ground | Always | 10 kΩ or higher |
| G128-33 (VOT-) or G1-14 (VOR-) - Body ground | Always | 10 kΩ or higher |
| G128-34 (VOR-) or G1-16 (VOT-) - Body ground | Always | 10 kΩ or higher |
| G128-18 (VOR+) or G1-15 (VOT+) - Body ground | Always | 10 kΩ or higher |
| NG |  | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 2. | CHECK HARNESS AND CONNECTOR (NAVIGATION ECU - DCM (TELEMATICS TRANSCEIVER)) |
| (a) Disconnect the G130 DCM (Telematics Transceiver) connector. |
|
(b) Disconnect the G108 navigation ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| G130-1 (USB-) - G108-2 (USB-) | Always | Below 1 Ω |
| G130-2 (USB+) - G108-1 (USB+) | Always | Below 1 Ω |
| G130-3 (USBS) - G108-3 (USBS) | Always | Below 1 Ω |
| G130-1 (USB-) or G108-2 (USB-) - Body ground | Always | 10 kΩ or higher |
| G130-2 (USB+) or G108-1 (USB+) - Body ground | Always | 10 kΩ or higher |
| G130-3 (USBS) or G108-3 (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:
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
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT:
Use the following procedure to troubleshoot the LEXUS ENFORM system.
*: Use the Techstream.
PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP
NEXT
Operation Check
OPERATION CHECK LEXUS APP SUITE RESET PROCEDURE (a) Duplicate the problem symptom. (b) Check for DTCs and repair the systems for which any DTCs are output. Click here (c) Check cellular phone compa
SEE MORE:
Installation
INSTALLATION CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.
PROCEDURE 1. INSTALL SIDE TURN SIGNAL LIGHT ASSEMBLY (a) Engage the 4 guides and 2 claws to install the side turn signal light assembly. 2. INSTALL OUTER
Installation
INSTALLATION PROCEDURE 1. INSTALL FUEL SUCTION TUBE WITH PUMP AND GAUGE ASSEMBLY (a) Install a new fuel suction tube set gasket to the fuel tank assembly. (b) Connect the fuel return vent tube sub-assembly to the fuel suction tube with pump and gauge assembly. Click here NOTICE: When connecting th
