DCM Power Source Circuit [02/2019 - 10/2019]: Procedure

1. Disconnect the DCM (Telephone Transceiver Assembly) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G9-4 (E) - Body ground	Always	Below 1 Ω

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

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   G9-1 (+B) - G9-4 (E)	Ignition switch off	11 to 14 V*1 10.5 to 16 V*2
   G9-7 (IG2) - G9-4 (E)	Ignition switch ON	11 to 14 V*1 10.5 to 16 V*2
   G9-8 (ACC) - G9-4 (E)	Ignition switch ACC	11 to 14 V*1 10.5 to 16 V*2

   *1: w/o Stop and start system

   *2: w/ Stop and start system

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [11/2018 - 10/2019] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR