DCM Power Source Circuit [01/2019 - 04/2020]: Procedure

1. Disconnect the I72 DCM (Telematics Transceiver) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to DCM (Telematics Transceiver))

2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I72-4 (E) - Body ground	Always	Below 1 Ω

3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   I72-1 (+B) - I72-4 (E)	Power switch off	11 to 14 V
   I72-7 (IG2) - I72-4 (E)	Power switch on (IG)	11 to 14 V
   I72-8 (ACC) - I72-4 (E)	Power switch on (ACC)	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [01/2019 - 04/2020] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR