Subaru 2002 IMPREZA Service Manual page 500

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 MODE <Ref. to EN-49, Clear
Memory Mode.> and INSPECTION MODE. <Ref. to EN-42, Inspection Mode.>
• WIRING DIAGRAM:
MAIN RELAY
4
6
5
3
2
1
B47
F44
B72
1 2 3 4
1 2
5 6 7 8
3 4
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:
TO FRONT OXYGEN (A/F) SENSOR
No.11
4
A:
B134
B: B135 ECM
C: B136
B22
E3
B47
B22
1 2
1 2 3 4
3 4
5 6 7 8
5 6
9 10 11 12
13 14 15 16
7 8
34 35
LHD 2 LHD
B61 F44
IGNITION
B72
SWITCH
SBF-4
1
1
AT MODEL: B6
MT MODEL: B25
B:
B135
4 5 6 7
1 2 3
8 9 10 11 12 13 14 15 16 17 18 19
20 21 22 23 24 25 26 27 28
Check
Is the resistance less than 10
Ω?
EN-68
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
Yes
Go to step 2. Replace the main
relay.
30
EN1397
No