DTC P161A-87: Lost Communication with Alternator Missing Message [08/2020 - ]: Procedure
WARNING: This page is about a different car, the 2021 Toyota Avalon. 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 C109 ECM connector.
- Disconnect the C57 generator assembly connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition C109-62 (LIN) - C57-2 (LIN) Always Below 1 Ω C109-62 (LIN) or C57-2 (LIN) - body ground Always 10 kΩ or higher Result
Proceed to OK NG
Result:
OK
REPLACE GENERATOR ASSEMBLY. Refer to PROCEDURE - Step 6
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR