DTC C1681-87: Front Camera Image Signal Missing Message [09/2022 - ]: Procedure
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus ES 350, 2024 Lexus ES 300h, 2024 Lexus ES 250, 2023 Lexus ES 350, and 2023 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - FRONT TELEVISION CAMERA ASSEMBLY)
Pre-procedure1
- Disconnect the N131 parking assist ECU connector.
- Disconnect the d1 front television camera assembly connector.
Procedure1
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition N131-1 (BCB+) - d1-2 (BCB+) Always Below 1 Ω N131-3 (BCV+) - d1-4 (BCV+) Always Below 1 Ω N131-4 (BCV-) - d1-3 (BCV-) Always Below 1 Ω N131-2 (BGND) - d1-1 (BGND) Always Below 1 Ω N131-5 (SGND) - d1-5 (SGND) Always Below 1 Ω N131-1 (BCB+) or d1-2(BCB+) - Body ground Always 10 kΩ or higher N131-3 (BCV+) or d1-4 (BCV+) - Body ground Always 10 kΩ or higher N131-4 (BCV-) or d1-3 (BCV-) - Body ground Always 10 kΩ or higher N131-2 (BGND) or d1-1 (BGND) - Body ground Always 10 kΩ or higher N131-5 (SGND) or d1-5 (SGND) - Body ground Always 10 kΩ or higher Result
Proceed to OK NG Post-procedure1
- None
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 2
- CHECK PARKING ASSIST ECU (BCV-, BGND)
Pre-procedure1
- Disconnect the N131 parking assist ECU connector.
*a Component without harness connected
(Parking Assist ECU)Procedure1
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition 2 (BGND) - Body ground Always Below 1 Ω 4 (BCV-) - Body ground Always Below 1 Ω Result
Proceed to OK NG Post-procedure1
- None
Result:
NG
REPLACE PARKING ASSIST ECU. Refer to REMOVAL [09/2022 - ]
Result:
OK
See step 3
- Disconnect the N131 parking assist ECU connector.
- CHECK PARKING ASSIST ECU (BCB+, BGND)
Pre-procedure1
- Disconnect the front television camera assembly connector.
Procedure1
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition d1-1 (BGND) - Body ground Always Below 1 Ω - Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Switch Condition Specified Condition d1-2 (BCB+) - d1-1 (BGND) Ignition switch ON 0.5 to 8 V Result
Proceed to OK NG Post-procedure1
- None
Result:
OK
REPLACE FRONT TELEVISION CAMERA ASSEMBLY. Refer to REMOVAL [09/2022 - ]
Result:
NG
REPLACE PARKING ASSIST ECU. Refer to REMOVAL [09/2022 - ]
- Disconnect the front television camera assembly connector.