DCM Data Signal Circuit between Navigation ECU and DCM: Procedure

1. Disconnect the z26 DCM connector.
   Fig 1: Identifying Front View Of Wire Harness Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the z27 display and navigation module display connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   z26-1-1 (USB-) - z27-1-1 (USB-)	Always	Below 1 Ω
   z26-1-2 (USB+) - z27-1-2 (USB+)	Always	Below 1 Ω
   z26-1-3 (USBS) - z27-1-3 (USBS)	Always	Below 1 Ω
   z26-2 (USBG) - z27-2 (USBG)	Always	Below 1 Ω
   z26-3 (VOT+) - z27-7 (VOR+)	Always	Below 1 Ω
   z26-4 (USBV) - z27-4 (USBV)	Always	Below 1 Ω
   z26-5 (VOT-) - z27-6 (VOR-)	Always	Below 1 Ω
   z26-6 (VOR-) - z27-5 (VOT-)	Always	Below 1 Ω
   z26-7 (VOR+) - z27-3 (VOT+)	Always	Below 1 Ω
   z26-1-1 (USB-) - Body ground	Always	10 kΩ or higher
   z26-1-2 (USB+) - Body ground	Always	10 kΩ or higher
   z26-1-3 (USBS) - Body ground	Always	10 kΩ or higher
   z26-2 (USBG) - Body ground	Always	10 kΩ or higher
   z26-3 (VOT+) - Body ground	Always	10 kΩ or higher
   z26-4 (USBV) - Body ground	Always	10 kΩ or higher
   z26-5 (VOT-) - Body ground	Always	10 kΩ or higher
   z26-6 (VOR-) - Body ground	Always	10 kΩ or higher
   z26-7 (VOR+) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to DCM (Telematics Transceiver))
   *2	Front view of wire harness connector (to Display and Navigation Module Display)

NG → REPLACE NO. 1 NAVIGATION WIRE 

OK → See step   2