DTC P1602-00: Deterioration of Battery Low Capacity [11/2021 - 03/2023]: Procedure
WARNING: This page is about a different car, the 2025 Lexus NX 350, 2024 Lexus NX 350, 2023 Lexus NX 350, and 2022 Lexus NX 350. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK CHARGING SYSTEM
Refer to ON-VEHICLE INSPECTION [11/2021 - ]
Result
Proceed to OK NG Result:
NG
REPAIR OR REPLACE CHARGING SYSTEM
Result:
OK
See step 2
- CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
- Disconnect the ECM connector.
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition B51-1 (BATT) - Body ground Always 11 to 14 V Result
Proceed to OK NG
Result:
OK
CHECK FOR INTERMITTENT PROBLEMS. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR