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 BRIGHTON WAGON AWD F4-2.2L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTTRANSMISSION CONTROL SYSTEMSTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSBASIC DIAGNOSTIC CHARTPART 1
1998 Subaru Legacy Brighton Wagon AWD F4-2.2L SOHC
Part 1
1998 Subaru Legacy Brighton Wagon AWD F4-2.2L SOHCSECTION Part 1
BASIC DIAGNOSTIC CHART
If no trouble codes appear in the on-board diagnostics operation (although problems have occurred or are occurring), measure performance characteristics of sensors, actuators, etc., in the Subaru Select Monitor and compare with the "basic data" to determine the cause of problems.
1) Trouble occurs.
2) No trouble codes appear in on-board diagnostics operation.
3) Measure each item using Subaru Select Monitor.
4) Compare measured values with basic data.
5) Determine item which is outside basic data specifications.
6) Check sensor and actuator affected.
BATTERY VOLTAGE
CHECK VEHICLE SPEED SENSOR 1.
CHECK VEHICLE SPEED SENSOR 2.
CHECK ENGINE SPEED SIGNAL.
CHECK ATF TEMPERATURE SENSOR.
CHECK THROTTLE POSITION SENSOR.
CHECK GEAR POSITION.
CHECK LINE PRESSURE DUTY.
CHECK LOCK-UP DUTY.
CHECK TRANSFER DUTY.
CHECK THROTTLE POSITION SENSOR POWER SUPPLY.
CHECK MASS AIR FLOW SIGNAL.
CHECK FWD SWITCH.
DIAGNOSIS:
- LED does not come on even if FWD switch is ON.
- FWD switch circuit is open or short.
If no trouble codes appear in the on-board diagnostics operation (although problems have occurred or are occurring), measure performance characteristics of sensors, actuators, etc., in the Subaru Select Monitor and compare with the "basic data" to determine the cause of problems.
1) Trouble occurs.
2) No trouble codes appear in on-board diagnostics operation.
3) Measure each item using Subaru Select Monitor.
4) Compare measured values with basic data.
5) Determine item which is outside basic data specifications.
6) Check sensor and actuator affected.
BATTERY VOLTAGE
CHECK VEHICLE SPEED SENSOR 1.
CHECK VEHICLE SPEED SENSOR 2.
CHECK ENGINE SPEED SIGNAL.
CHECK ATF TEMPERATURE SENSOR.
CHECK THROTTLE POSITION SENSOR.
CHECK GEAR POSITION.
CHECK LINE PRESSURE DUTY.
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CHECK LOCK-UP DUTY.
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CHECK TRANSFER DUTY.
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CHECK THROTTLE POSITION SENSOR POWER SUPPLY.
CHECK MASS AIR FLOW SIGNAL.
CHECK FWD SWITCH.
DIAGNOSIS:
- LED does not come on even if FWD switch is ON.
- FWD switch circuit is open or short.
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.