DCM Data Signal Circuit between Navigation ECU and DCM: Procedure

1. Disconnect the H159 DCM (Telematics Transceiver) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the H158 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
   H159-1-1 (USB-) - H158-1-1 (USB-)	Always	Below 1 Ω
   H159-1-2 (USB+) - H158-1-2 (USB+)	Always	Below 1 Ω
   H159-1-3 (USBS) - H158-1-3 (USBS)	Always	Below 1 Ω
   H159-2 (USBG) - H158-2 (USBG)	Always	Below 1 Ω
   H159-3 (VOT+) - H158-7 (VOR+)	Always	Below 1 Ω
   H159-4 (USBV) - H158-4 (USBV)	Always	Below 1 Ω
   H159-5 (VOT-) - H158-6 (VOR-)	Always	Below 1 Ω
   H159-6 (VOR-) - H158-5 (VOT-)	Always	Below 1 Ω
   H159-7 (VOR+) - H158-3 (VOT+)	Always	Below 1 Ω
   H159-1-1 (USB-) - Body ground	Always	10 kΩ or higher
   H159-1-2 (USB+) - Body ground	Always	10 kΩ or higher
   H159-1-3 (USBS) - Body ground	Always	10 kΩ or higher
   H159-2 (USBG) - Body ground	Always	10 kΩ or higher
   H159-3 (VOT+) - Body ground	Always	10 kΩ or higher
   H159-4 (USBV) - Body ground	Always	10 kΩ or higher
   H159-5 (VOT-) - Body ground	Always	10 kΩ or higher
   H159-6 (VOR-) - Body ground	Always	10 kΩ or higher
   H159-7 (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