Subaru 2002 IMPREZA Service Manual page 882

DIAGNOSTICS FOR ENGINE STARTING FAILURE
ENGINE (DIAGNOSTICS)
C: CONTROL MODULE POWER SUPPLY AND GROUND LINE
CAUTION:
After repair or replacement of faulty parts, conduct CLEAR MEMORY and INSPECTION MODES. <Ref.
to EN(w/oOBD)-30, OPERATION, Clear Memory Mode.> and <Ref. to EN(w/oOBD)-28, OPERATION,
Inspection Mode.>
• WIRING DIAGRAM:
MAIN RELAY
6
4
5
3
2
1
B47
B72 B47
1 2
1 2 3 4
1 2
3 4
5 6 7 8
3 4
5 6
A: B134
1 2 3 4 5 6
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
24 25 26 27 28 29 30 31 32 33
Step
1 CHECK MAIN RELAY.
1)Turn the ignition switch to OFF.
2)Remove the main relay.
3)Connect the battery to main relay terminals
No. 1 and No. 2.
4)Measure the resistance between main relay
terminals.
Terminals
No. 3 — No. 5:
No. 4 — No. 6:
No.11
ECM
A: B134
B: B135
C: B136
B22
E3
F44 B22
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
7 8
34 35
EN(w/oOBD)-48
B61 F44
2
LHD LHD
IGNITION
B72
SWITCH
SBF-4
4 1
1 AT MODEL (RHD ONLY) : B6
MT MODEL : B25
B: B135
1 2 3 4 5 6 7
8 9
10 11 12 13 14 15 16 17 18 19
26 27 28
20 21 22 23 24 25
Check
Is the resistance less than 10
Ω?
SBF-5
BATTERY
SBF-1
C: B136
1 2 3 4 5 6 7
8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
Yes
Go to step 2. Replace the main
relay.
EN1452
No