DCM Data Signal Circuit between Navigation ECU and DCM: Procedure

1. Disconnect the J128 DCM (Telematics Transceiver) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the J129 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
   J128-1-1 (USB-) - J129-1-1 (USB-)	Always	Below 1 Ω
   J128-1-2 (USB+) - J129-1-2 (USB+)	Always	Below 1 Ω
   J128-1-3 (USBS) - J129-1-3 (USBS)	Always	Below 1 Ω
   J128-2 (USBG) - J129-2 (USBG)	Always	Below 1 Ω
   J128-3 (VOT+) - J129-7 (VOR+)	Always	Below 1 Ω
   J128-4 (USBV) - J129-4 (USBV)	Always	Below 1 Ω
   J128-5 (VOT-) - J129-6 (VOR-)	Always	Below 1 Ω
   J128-6 (VOR-) - J129-5 (VOT-)	Always	Below 1 Ω
   J128-7 (VOR+) - J129-3 (VOT+)	Always	Below 1 Ω
   J128-1-1 (USB-) - Body ground	Always	10 kΩ or higher
   J128-1-2 (USB+) - Body ground	Always	10 kΩ or higher
   J128-1-3 (USBS) - Body ground	Always	10 kΩ or higher
   J128-2 (USBG) - Body ground	Always	10 kΩ or higher
   J128-3 (VOT+) - Body ground	Always	10 kΩ or higher
   J128-4 (USBV) - Body ground	Always	10 kΩ or higher
   J128-5 (VOT-) - Body ground	Always	10 kΩ or higher
   J128-6 (VOR-) - Body ground	Always	10 kΩ or higher
   J128-7 (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 → REPLACE NO. 1 NAVIGATION WIRE 

OK → See step   2