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 | .gif) | 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:
Main Body ECU Vehicle Information Reading/Writing Process Malfunction (B15F6)
DESCRIPTION This DTC is stored when items controlled by the main body ECU (multiplex network body ECU) cannot be customized via the audio and visual system vehicle customization screen. HINT: The main body ECU (multiplex network body ECU) controls the items for the following systems that are customi
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Power Tilt and Power Telescopic Steering Column System DTC No. Detection Item DTC Detection Condition Link B26031C Tilt and Telescopic Manual Switch Circuit Circuit Voltage Out of Range When operating the tilt and telescopic switch, an abnormal voltage
