DCM Data Signal Circuit between Navigation ECU and DCM [08/2018 - 08/2021]: Procedure

1. Disconnect the DCM (Telematics Transceiver) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to DCM [Telematics Transceiver])
   *b	Front view of wire harness connector (to Multi-media Module Receiver Assembly)

2. Disconnect the multi-media module receiver assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H54-1 (USB-) - H17-1-1 (USB-)	Always	Below 1 Ω
   H54-2 (USB+) - H17-1-2 (USB+)	Always	Below 1 Ω
   H54-3 (USBG) - H17-2 (USBG)	Always	Below 1 Ω
   H54-4 (VOT+) - H17-7 (VOR+)	Always	Below 1 Ω
   H54-5 (USBV) - H17-4 (USBV)	Always	Below 1 Ω
   H54-6 (USBS) - H17-1-3 (USBS)	Always	Below 1 Ω
   H54-7 (VOT-) - H17-6 (VOR-)	Always	Below 1 Ω
   H54-8 (VOR-) - H17-5 (VOT-)	Always	Below 1 Ω
   H54-9 (VOR+) - H17-3 (VOT+)	Always	Below 1 Ω
   H54-1 (USB-) - Body ground	Always	10 kΩ or higher
   H54-2 (USB+) - Body ground	Always	10 kΩ or higher
   H54-3 (USBG) - Body ground	Always	10 kΩ or higher
   H54-4 (VOT+) - Body ground	Always	10 kΩ or higher
   H54-5 (USBV) - Body ground	Always	10 kΩ or higher
   H54-6 (USBS) - Body ground	Always	10 kΩ or higher
   H54-7 (VOT-) - Body ground	Always	10 kΩ or higher
   H54-8 (VOR-) - Body ground	Always	10 kΩ or higher
   H54-9 (VOR+) - Body ground	Always	10 kΩ or higher

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

(Refer to PROBLEM SYMPTOMS TABLE [08/2015 - 08/2021] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR