Subaru 2009 IMPREZA Service Manual page 140

6) Connect the probe to ECM connector.
(A)
7 6 5 4
17 16 15 14 13 12 11 10
25 24 21 22
31 30 29 28
(A) To ECM connector
Terminal No.
12
22
7) Start the engine and let it idle.
8) Check the pattern is as same as the waveform
and voltage shown below.
LH
0
RH
0
(A)
(A) One camshaft rotation
Camshaft Position Sensor
3 2 1
9 8
21 20 19 18
27 26
FU-04346
Probe
+
–
(A)
5V
40ms
FU-04209
FU(H4SO)-29
FUEL INJECTION (FUEL SYSTEMS)