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 MANAGEMENTEMISSION CONTROL SYSTEMSEXHAUST GAS RECIRCULATIONEGR CONTROL SOLENOIDTESTING AND INSPECTION
1998 Subaru Legacy Brighton Wagon AWD F4-2.2L SOHC
EGR Control Solenoid: Testing and Inspection
1998 Subaru Legacy Brighton Wagon AWD F4-2.2L SOHCSECTION Testing and Inspection
A faulty EGR control solenoid will set code 34 in the on-board diagnostic system.
WIRE COLOR CODE IDENTIFICATION
L: Blue
B: Black
Y: Yellow
G: Green
R: Red
W: White
Br: Brown
Lg: Light green
Gr: Gray
EGR CONTROL SOLENOID DIAGNOSTIC CHART
CHECK ECM VOLTAGE
With ignition "ON," measure voltage between ECM connector terminal (E30) 18 and ground. It should read 10 - 13 Volts.
CHECK EGR CONTROL SOLENOID
Disconnect EGR control solenoid connector and measure resistance between solenoid terminals. It should read 36 Ohms at 20°C (68°F).
CHECK POWER SUPPLY TO EGR CONTROL SOLENOID
1. Turn ignition switch "ON".
2. Measure voltage between solenoid connector and ground as follows:
Connector & terminal: Voltage:
(E16)2-Ground 10 VDC minimum
WIRE COLOR CODE IDENTIFICATION
L: Blue
B: Black
Y: Yellow
G: Green
R: Red
W: White
Br: Brown
Lg: Light green
Gr: Gray
Diagnostic Chart:
EGR CONTROL SOLENOID DIAGNOSTIC CHART
Input Signal:
CHECK ECM VOLTAGE
With ignition "ON," measure voltage between ECM connector terminal (E30) 18 and ground. It should read 10 - 13 Volts.
CHECK EGR CONTROL SOLENOID
Disconnect EGR control solenoid connector and measure resistance between solenoid terminals. It should read 36 Ohms at 20°C (68°F).
CHECK POWER SUPPLY TO EGR CONTROL SOLENOID
Voltage Test:
1. Turn ignition switch "ON".
2. Measure voltage between solenoid connector and ground as follows:
Connector & terminal: Voltage:
(E16)2-Ground 10 VDC minimum
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.