Subaru IMPREZA GD 2007 Series Manual page 374

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
WIRING DIAGRAM:
MAIN RELAY
6
3
5
4
2
1
B47
EGR VALVE
E18
B134 ECM
Step
1 CHECK HARNESS BETWEEN ECM AND
EGR VALVE CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from EGR valve.
3) Turn the ignition switch to ON.
4) Measure the voltage between ECM and
chassis ground.
Connector & terminal
DTC P1493; (B134) No. 8 (+) — Chassis
ground (–):
DTC P1495; (B134) No. 9 (+) — Chassis
ground (–):
DTC P1497; (B134) No. 10 (+) — Chassis
ground (–):
DTC P1499; (B134) No. 20 (+) — Chassis
ground (–):
SBF-5
2
B61 F44
B21
E100
E100
B21
Is the voltage 10 V or more?
EN(H4SO)(diag)-265
ENGINE (DIAGNOSTICS)
BATTERY
1
8
18
28 29
1 2
12 13 14 15 16 17 18 19 20 21 22
23 24 25 26 27 28 29 30 31 32 33
E
Check Yes
Repair the short
circuit to power in
the harness
between the ECM
and EGR solenoid
valve connectors.
E18
1 2 3
4 5 6
B47
1 2
3 4
5 6
F44
1 2 3 4
5 6 7 8
B134
2 3 4 5 6 7
9 10 11 12 13 14 15 16 17
19 20 21 22 23 24 25 26 27
30 31 32 33 34
B21
3 4 5 6 7 8 9 10 11
34 35 36 37 38 39 40 41
42 43 44 45 46 47
48 49 50 51 52 53 54
EN-04186
No
Repair poor con-
tact of the ECM
connector.