Power Source Circuit [11/2017 - 01/2023]: Procedure
WARNING: This page is about a different car, the 2022 Lexus RC F, 2021 Lexus RC F, 2020 Lexus RC F, 2019 Lexus RC F, and 2018 Lexus RC F. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK HARNESS AND CONNECTOR (POWER SOURCE VOLTAGE)
- Disconnect the W18 forward recognition camera connector.
*a Front view of wire harness connector
(to Forward Recognition Camera) - Turn the engine switch on (IG).
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition W18-7 (IGB) - Body ground Engine switch on (IG) 11 to 14 V - Turn the engine switch off.
- Connect the W18 forward recognition camera connector.
Result
Proceed to OK NG
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 2
- Disconnect the W18 forward recognition camera connector.
- CHECK HARNESS AND CONNECTOR (FORWARD RECOGNITION CAMERA - BODY GROUND)
- Disconnect the W18 forward recognition camera connector.
*a Front view of wire harness connector
(to Forward Recognition Camera) - Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition W18-10 (GND) - Body ground Always Below 1 Ω - Connect the W18 forward recognition camera connector.
Result
Proceed to OK NG
Result:
OK
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE [11/2017 - 01/2023]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
- Disconnect the W18 forward recognition camera connector.