DCM Power Source Circuit [06/2018 - 10/2019]: Procedure
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus ES 300h, 2023 Lexus ES 300h, 2022 Lexus ES 300h, 2021 Lexus ES 300h, and 2020 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 GROUND)
- Disconnect the G10 DCM (Telematics Transceiver) connector.
*a Front view of wire harness connector
(to DCM (Telematics Transceiver)) - Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition G10-4 (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 G10-1 (+B) - G10-4 (E) Power switch off 11 to 14 V G10-7 (IG2) - G10-4 (E) Power switch on (IG) 11 to 14 V G10-8 (ACC) - G10-4 (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 [06/2018 - 10/2019]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
- Disconnect the G10 DCM (Telematics Transceiver) connector.