Impreza Wagon AWD F4-1820cc 1.8L SOHC (1993)
EGR Temperature Sensor: 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
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 VDC at 68° F (20° C)
(E31)4-Ground
0.4 - 1.2 VDC at 212° F (100° C)
CHECK HARNESS BETWEEN SENSOR AND ECM
Harness Test
