DCM Data Signal Circuit between Radio Receiver and DCM [12/2019 - 10/2022]: Procedure

1. Disconnect the H3 radio and display receiver assembly connector.
2. Disconnect the H11 DCM (telematics transceiver) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H3-10 (USBV) - H11-15 (USBV)	Always	Below 1 Ω
   H3-11 (USBG) - H11-31 (USBG)	Always	Below 1 Ω
   H3-15 (VOT+) - H11-18 (VOR+)	Always	Below 1 Ω
   H3-16 (VOT-) - H11-34 (VOR-)	Always	Below 1 Ω
   H3-13 (VOR+) - H11-17 (VOT+)	Always	Below 1 Ω
   H3-14 (VOR-) - H11-33 (VOT-)	Always	Below 1 Ω
   H3-10 (USBV) - Body ground	Always	10 kΩ or higher
   H3-11 (USBG) - Body ground	Always	10 kΩ or higher
   H3-15 (VOT+) - Body ground	Always	10 kΩ or higher
   H3-16 (VOT-) - Body ground	Always	10 kΩ or higher
   H3-13 (VOR+) - Body ground	Always	10 kΩ or higher
   H3-14 (VOR-) - Body ground	Always	10 kΩ or higher
   H3-12 (SGND) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  2

1. Disconnect the c2 DCM (telematics transceiver) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to DCM (Telematics Transceiver))
   *b	Front view of wire harness connector (to Radio and Display Receiver Assembly)

2. Disconnect the c1 radio and display receiver assembly connectors.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   c2-1 (USB-) - c1-2 (US4-)	Always	Below 1 Ω
   c2-2 (USB-) - c1-1 (US4+)	Always	Below 1 Ω
   c2-3 (USBS) - c1-3 (US4D)	Always	Below 1 Ω
   c2-1 (USB-) - Body ground	Always	10 kΩ or higher
   c2-2 (USB+) - Body ground	Always	10 kΩ or higher
   c2-3 (USBS) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [12/2019 - 10/2022]  

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR