Clearance Warning ECU Power Source Circuit [08/2023 - ]: Procedure
WARNING: This page is about a different car, the 2025 Toyota GR Corolla, 2025 Toyota Corolla, 2024 Toyota GR Corolla, and 2024 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY POWER SOURCE)
- Disconnect the I24 clearance warning ECU assembly connector.
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Switch Condition Specified Condition I24-1 (IG) - Body ground Ignition switch ON 11 to 14 V I24-1 (IG) - Body ground Ignition switch off Below 1 V Result
Proceed to OK NG
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 2
- CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - BODY GROUND)
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition I24-31 (E) - Body ground Always Below 1 Ω Result
Proceed to OK NG
Result:
OK
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE [08/2023 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
- Measure the resistance according to the value(s) in the table below.