DTC P161A-87: Lost Communication with Alternator Missing Message [08/2020 - ]: Procedure
WARNING: This page is about a different car, the 2024 Lexus ES 250, 2023 Lexus ES 250, 2022 Lexus ES 250, and 2021 Lexus ES 250. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK CHARGING SYSTEM
- Check the charging system.
Refer to ON-VEHICLE INSPECTION [08/2020 - ]
Result
Result OK NG
Result:
NG
REPAIR OR REPLACE CHARGING SYSTEM
Result:
OK
See step 2
- Check the charging system.
- CHECK HARNESS AND CONNECTOR (ECM - GENERATOR ASSEMBLY)
- Disconnect the or C77 ECM connector.
- Disconnect the C33 generator assembly connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition C77-62 (LIN) - C33-2 (LIN) Always Below 1 Ω C77-62 (LIN) or C33-2 (LIN) - body ground Always 10 kΩ or higher Result
Proceed to OK NG
Result:
OK
REPLACE GENERATOR ASSEMBLY. Refer to REMOVAL [08/2020 - 08/2021] , or refer to REMOVAL [08/2021 - 09/2022] , or refer to REMOVAL [09/2022 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR