DCM Data Signal Circuit between Navigation ECU and DCM: Procedure

1. Disconnect the DCM (telematics transceiver) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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
   N145-1-1 (USB-) - N146-1-1 (USB-)	Always	Below 1 Ω
   N145-1-2 (USB+) - N146-1-2 (USB+)	Always	Below 1 Ω
   N145-1-3 (USBS) - N146-1-3 (USBS)	Always	Below 1 Ω
   N145-2 (USBG) - N146-2 (USBG)	Always	Below 1 Ω
   N145-3 (VOT+) - N146-7 (VOR+)	Always	Below 1 Ω
   N145-4 (USBV) - N146-4 (USBV)	Always	Below 1 Ω
   N145-5 (VOT-) - N146-6 (VOR-)	Always	Below 1 Ω
   N145-6 (VOR-) - N146-5 (VOT-)	Always	Below 1 Ω
   N145-7 (VOR+) - N146-3 (VOT+)	Always	Below 1 Ω
   N145-1-1 (USB-) - Body ground	Always	10 kΩ or higher
   N145-1-2 (USB+) - Body ground	Always	10 kΩ or higher
   N145-1-3 (USBS) - Body ground	Always	10 kΩ or higher
   N145-2 (USBG) - Body ground	Always	10 kΩ or higher
   N145-3 (VOT+) - Body ground	Always	10 kΩ or higher
   N145-4 (USBV) - Body ground	Always	10 kΩ or higher
   N145-5 (VOT-) - Body ground	Always	10 kΩ or higher
   N145-6 (VOR-) - Body ground	Always	10 kΩ or higher
   N145-7 (VOR+) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

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

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   2