DCM Power Source Circuit [08/2013 - ]: Procedure

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.

CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - AUXILIARY BATTERY AND BODY GROUND)

Disconnect the H101 DCM (Telematics Transceiver) connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Standard Resistance

Tester Connection	Condition	Specified Condition
H101-4 (E) - Body ground	Always	Below 1 Ω

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

Standard Voltage

Tester Connection	Condition	Specified Condition
H101-1 (+B) - H101-4 (E)	Power switch off	11 to 14 V
H101-7 (IG2) - H101-4 (E)	Power switch on (IG)	11 to 14 V
H101-8 (ACC) - H101-4 (E)	Power switch on (ACC)	11 to 14 V

TEXT IN ILLUSTRATION

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

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK → See step 2

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE [08/2013 - ]