Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Clearance Warning ECU Power Source Circuit: Procedure
- INSPECT FUSE (P-IG1-1)
- Remove the P-IG1-1 fuse from the passenger side junction block.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
Tester Connection Condition Specified Condition P-IG1-1 fuse Always Below 1 Ω
NG → REPLACE FUSE
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU POWER SUPPLY)
- Disconnect the L19 ECU connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
Tester Connection Condition Specified Condition 15 (IG) - Body ground Always Below 1 Ω 17 (E) - Body ground Always Below 1 Ω - Measure the voltage according to the value(s) in the table below.
Standard voltage
Tester Connection Condition Specified Condition 15 (IG) - 17 (E) Engine switch on (IG) 11 to 14 V
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK → See step 3
- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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