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 MANUALSSUBARU1985GL 4D SEDAN, 1.8 5, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMFUEL INJ SYSTEM - MPFI
1985 Subaru GL 4D Sedan, 1.8 5, Standard
Fuel INJ System - MPFI
1985 Subaru GL 4D Sedan, 1.8 5, StandardSECTION Fuel INJ System - MPFI
- Description
- Operation
- Inspection & Adjustment
- Self-Diagnostic System
- System Overview
- Self-Diagnosis Function
- SELF-DIAGNOSIS Function
- Fail-Safe Function
- OXYGEN SENSOR MONITOR Lamp
- Trouble Code Component Menu
- Initial Trouble Shooting Code Charts
- MPFI System Component Layout
- Checking MPFI Control Unit Ground
- Checking ECS Lamp Circuit
- Checking Fuel Pump Circuit
- Trouble Code 11 (Ignition Pulse)
- Trouble Code 12 (Starter Switch)
- Trouble Code 13 (Starter Switch)
- Trouble Code 14 (Airflow Meter)
- Trouble Code 14 (Airflow Meter - C)
- Trouble Code 14 (Airflow Meter - D)
- Trouble Code 15 (Pressure Switch - Turbo)
- Trouble Code 15 (Pressure Switch - Turbo - E)
- Trouble Code 21 (Airflow Meter)
- Trouble Code 22 (Pressure Switch - Turbo)
- Trouble Code 22 (Pressure Switch - Non-Turbo)
- Trouble Code 23 (Idle Switch)
- Trouble Code 24 (Wide Open Throttle Switch
- Trouble Code 31 (Speed Sensor)
- Trouble Code 32 (0(2) Sensor)
- Trouble Code 33 (Coolant Temp. Sensor)
- Trouble Code 34 (Air Temp. Sensor)
- Trouble Code 35 (EGR Switch)
- Trouble Code 41 (MPFI Ecu), Code 42 (Injector - A)
- Trouble Code 42 (Fuel Injector - F)
- Trouble Code 43 (KDLH Relay - A)
- Trouble Code 43 (KDLH Relay - G)
- Wiring Diagrams
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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.