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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSSUBARU1998LEGACY OUTBACK SPORT AWD F4-2.2L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTEMISSION CONTROL SYSTEMSEXHAUST GAS RECIRCULATIONEGR TEMPERATURE SENSORTESTING AND INSPECTION
1998 Subaru Legacy Outback Sport AWD F4-2.2L SOHC
EGR Temperature Sensor: Testing and Inspection
1998 Subaru Legacy Outback Sport AWD F4-2.2L SOHCSECTION Testing and Inspection
A faulty EGR temperature sensor will set code 55 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 TEMPERATURE SENSOR DIAGNOSTIC CHART
CHECK INPUT SIGNAL FOR ECM
1. Turn ignition switch "ON".
2. Measure voltage between ECM connector and ground as follows:
Connector & terminal: Voltage:
(E31)4-Ground 4 - 4.8 Volts DC at 20°C (68°F)
(E31)4-Ground 0.4 - 1.2 Volts DC at 100°C (212°F)
CHECK HARNESS BETWEEN SENSOR AND ECM
1. Turn ignition switch "OFF".
2. Disconnect EGR temperature sensor harness connector.
3. Measure resistance between harness connector at ECM and sensor as follows:
Connector & terminal: Resistance:
(E31)4-(E15)1 10 Ohms maximum
4. Measure resistance between harness connector at ECM and ground as follows:
Connector & terminal: Resistance:
(E31)4-Ground 1 M.Ohms minimum
WIRE COLOR CODE IDENTIFICATION
L: Blue
B: Black
Y: Yellow
G: Green
R: Red
W: White
Br: Brown
Lg: Light green
Gr: Gray
EGR TEMPERATURE SENSOR DIAGNOSTIC CHART
Diagnostic Chart:
CHECK INPUT SIGNAL FOR ECM
Input Signal:
1. Turn ignition switch "ON".
2. Measure voltage between ECM connector and ground as follows:
Connector & terminal: Voltage:
(E31)4-Ground 4 - 4.8 Volts DC at 20°C (68°F)
(E31)4-Ground 0.4 - 1.2 Volts DC at 100°C (212°F)
CHECK HARNESS BETWEEN SENSOR AND ECM
Harness Test:
1. Turn ignition switch "OFF".
2. Disconnect EGR temperature sensor harness connector.
3. Measure resistance between harness connector at ECM and sensor as follows:
Connector & terminal: Resistance:
(E31)4-(E15)1 10 Ohms maximum
Harness Test:
4. Measure resistance between harness connector at ECM and ground as follows:
Connector & terminal: Resistance:
(E31)4-Ground 1 M.Ohms minimum
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.