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.
1987 Subaru XT GL, AutomaticFACTORY OEM SERVICE PROCEDURE
Fuel Pump Circuit
- Turn ignition on. Fuel pump should operate for 1.5 seconds. Start engine and check for pump operation. If no operation, check for voltage from pump relay at Blue wire on pump.
- If voltage is not present, check relay operation. If voltage is present, check ground wire back to ECU. Check ECU terminal No. 55 for voltage. If not present, replace ECU.
- If voltage was present at ECU, check wiring and pump. If pump operates and engine will not start, check fusible links, injectors, injector resistors, coolant temperature sensor and TPS. If engine will still not start, check power and grounds to ECU. If okay, replace ECU.
Factory Service Tools
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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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