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.
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HOMESERVICE MANUALSSUBARU1998LEGACY OUTBACK SPORT AWD F4-2.2L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSA/C SIGNALDESCRIPTION AND OPERATION
1998 Subaru Legacy Outback Sport AWD F4-2.2L SOHC
A/C Signal: Description and Operation
1998 Subaru Legacy Outback Sport AWD F4-2.2L SOHCSECTION Description and Operation
A/C Circuit:
PURPOSE
When received by the ECM, the A/C switch signal causes the ECM to make adjustments needed (such as raise idle speed) to compensate for the added load. When the ECM receives a "full open" signal from the throttle position sensor while the A/C is operating, the A/C cut relay turns off the compressor for a certain period. This improves full-throttle acceleration.
RENDER: 1.0x
NO RELATED
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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.