DTC C1621: Back Camera Power Supply Failure [06/2018 - 09/2022]: Procedure
WARNING: This page is about a different car, the 2022 Lexus ES 300h, 2021 Lexus ES 300h, 2020 Lexus ES 300h, and 2019 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY ASSEMBLY - REAR TELEVISION CAMERA ASSEMBLY)
- Disconnect the G22 multi-display assembly connector.
- Disconnect the T1 rear television camera assembly connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition G22-10 (CA+) - T1-6 (CB+) Always Below 1 Ω G22-21 (CGND) - T1-5 (CGND) Always Below 1 Ω G22-10 (CA+) or T1-6 (CB+) - Body ground Always 10 kΩ or higher G22-21 (CGND) or T1-5 (CGND) - Body ground Always 10 kΩ or higher Result
Proceed to OK NG
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 2
- INSPECT MULTI-DISPLAY ASSEMBLY
- Reconnect the G22 multi-display assembly connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition G22-21 (CGND) - Body ground Always Below 1 Ω *a Component with harness connected
(Multi-display Assembly) - Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition G22-10 (CA+) - G22-21 (CGND) Engine switch on (ACC) 5.5 to 7.05 V Result
Proceed to OK NG
Result:
OK
REPLACE REAR TELEVISION CAMERA ASSEMBLY. Refer to REMOVAL [06/2018 - 09/2022]
Result:
NG
REPLACE MULTI-DISPLAY ASSEMBLY. Refer to REMOVAL [06/2018 - 08/2020] , or refer to REMOVAL [08/2020 - 09/2022]