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 SYSTEMSDESCRIPTION AND OPERATIONON-BOARD DIAGNOSTICS SYSTEM
1998 Subaru Legacy Brighton Wagon AWD F4-2.2L SOHC
On-Board Diagnostics System
1998 Subaru Legacy Brighton Wagon AWD F4-2.2L SOHCSECTION On-Board Diagnostics System
FUNCTION
The self-diagnosis system is capable of detecting any trouble which has occurred in any of the following input and output signal systems:
^ Vehicle speed sensor 1
^ Vehicle speed sensor 2
^ Throttle sensor
^ Shift solenoid 1
^ Shift solenoid 2
^ Shift solenoid 3
^ Duty solenoid B
^ Duty solenoid C (AWD only)
^ ATF temperature sensor
^ Ignition pulse
^ Duty solenoid A
The results of self-diagnosis are displayed by flashing power indicator lamp:
^ Repeated flashing at 4 Hz: error such as battery trouble.
^ Repeated flashing at 2 Hz: normal
^ Output of trouble code: check faulty component
^ Lamp continuously lit: error in inhibitor switch, manual switch, idle switch, or wiring
OPERATION OF INDICATOR LAMP
When any on-board diagnostic item is malfunctioning, the power indicator light blinks immediately after the engine starts. If there is no problem, the light goes out approximately 2 seconds after engine start. The malfunctioning part or unit can be determined by a trouble code during on-board diagnostic operation. Problems which occurred previously can also be identified through the memory function. If the power indicator does not show a problem (although a problem is occurring), the problem can be determined by checking the performance characteristics of each sensor using the Select Monitor or equivalent.
TROUBLE CODES
11 - Duty solenoid A
12 - Duty solenoid B
13 - Shift solenoid 3
14 - Shift solenoid 2
15 - Shift solenoid 1
21 - ATF temperature. sensor
23 - Engine rpm
24 - Duty solenoid C
31 - Throttle sensor
32 - Vehicle speed sensor 1
33 - Vehicle speed sensor 2
The self-diagnosis system is capable of detecting any trouble which has occurred in any of the following input and output signal systems:
^ Vehicle speed sensor 1
^ Vehicle speed sensor 2
^ Throttle sensor
^ Shift solenoid 1
^ Shift solenoid 2
^ Shift solenoid 3
^ Duty solenoid B
^ Duty solenoid C (AWD only)
^ ATF temperature sensor
^ Ignition pulse
^ Duty solenoid A
The results of self-diagnosis are displayed by flashing power indicator lamp:
^ Repeated flashing at 4 Hz: error such as battery trouble.
^ Repeated flashing at 2 Hz: normal
^ Output of trouble code: check faulty component
^ Lamp continuously lit: error in inhibitor switch, manual switch, idle switch, or wiring
OPERATION OF INDICATOR LAMP
Power Indicator Malfunction Display:
When any on-board diagnostic item is malfunctioning, the power indicator light blinks immediately after the engine starts. If there is no problem, the light goes out approximately 2 seconds after engine start. The malfunctioning part or unit can be determined by a trouble code during on-board diagnostic operation. Problems which occurred previously can also be identified through the memory function. If the power indicator does not show a problem (although a problem is occurring), the problem can be determined by checking the performance characteristics of each sensor using the Select Monitor or equivalent.
TROUBLE CODES
11 - Duty solenoid A
12 - Duty solenoid B
13 - Shift solenoid 3
14 - Shift solenoid 2
15 - Shift solenoid 1
21 - ATF temperature. sensor
23 - Engine rpm
24 - Duty solenoid C
31 - Throttle sensor
32 - Vehicle speed sensor 1
33 - Vehicle speed sensor 2
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.