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.
Check Ignition Switch Circuit
- CHECK DATA MONITOR
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Display the data of [BATT voltage (control)] and [IGN Voltage] using Subaru Select Monitor. Ref. to BODY CONTROL (DIAGNOSTICS)>DATA MONITOR .
Does the [IGN Voltage] indicate 0 V when the ignition switch is OFF, and fall within a range of ±1 V from the [BATT voltage (control)] when the ignition switch is ON?
Yes: The ignition switch input circuit is OK.
No: Go to 2.
- CHECK IGNITION SWITCH CIRCUIT
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- Turn the ignition switch to OFF.
- Disconnect the connector of body integrated unit.
- Turn the ignition switch to ON.
- Measure the voltage between the body integrated unit connector and chassis ground.
Connector & terminal
(i265) No. 1 (+) - Chassis ground (-):
Is the voltage 10 V or more?
Yes: Check body integrated unit. Ref. to BODY CONTROL (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE .
No: Check the harness for open or short circuit between body integrated unit and fuse.
NO RELATED
Use the Manual With the Right Hardware
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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.