DCM Data Signal Circuit between Navigation ECU and DCM [07/2015 - ]: Procedure

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the H158 radio 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 Radio Receiver Assembly)

Result:  OK

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE 

(Refer to PROBLEM SYMPTOMS TABLE [07/2015 - ] )

Result:  NG

NG 

REPLACE NAVIGATION WIRE