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.
1. Fused B(+) Circuit Open
Turn the ignition off.
Disconnect the PCM C5 harness connector.
Turn the ignition on.
Measure the voltage of the Fused Ignition Switch Output circuit at the PCM C5 harness connector.
Is the voltage above 10 volts?
- Yes >> Go to 2
- No
>> Repair the Fused Ignition Switch Output circuit for an open.
Perform POWERTRAIN VERIFICATION TEST - VER 2 in ENGINE - ELECTRICAL DIAGNOSTICS article.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.