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 | ![]() | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
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 |
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