Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 212
EN(H4DOTC)(diag)-72
Malfunction Indicator Light
ENGINE (DIAGNOSTICS)
F: MALFUNCTION INDICATOR LIGHT REMAINS BLINKING
DIAGNOSIS:
The delivery (test) mode connector circuit is short-circuited to ground.
TROUBLE SYMPTOM:
Malfunction indicator light blinks when delivery (test) mode connector is not connected.
WIRING DIAGRAM:
• Engine electrical system, without SI-DRIVE <Ref. to WI-32, WITHOUT SI-DRIVE, WIRING DIAGRAM,
• Engine electrical system, with SI-DRIVE <Ref. to WI-48, WITH SI-DRIVE, WIRING DIAGRAM, Engine
ECM
1
1
1
B76
B75
B364
B363
1
2
B364
B76
B75
1
2
B363
B122
3 4
5 6
1 2
7 8
2 3 4 5
1
6 7 8
i97
i10
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 31 32 33 34 35 36 37 38 39 40
21
*
**
22
i97
*
4
34
i10
2
B72
1
3
4 5 6
2
16
10 11 12 13 14 15
25
24
30
9
8
7
17 18 19 20
28
21 22 23
29
32
31
1
2
3
4
5
6
27
26
33 34 35
B136
B136
*
B122
1
B72
3
*
EN-09248
E
SBF-6
E
MAIN SBF
No. 5
IGNITION
SWITCH
BATTERY
DRIVE CIRCUIT
COMBINATION
METER
: TERMINAL No. OPTIONAL ARRANGEMENT
DELIVERY
(TEST)
MODE
CONNECTOR
TEST MODE
SUB
CONNECTOR
EN(H4DOTC)(diag)-73
Malfunction Indicator Light
ENGINE (DIAGNOSTICS)
Step
Check
Yes
No
1
CHECK DELIVERY (TEST) MODE CONNEC-
TOR.
1) Check the delivery (test) mode connector is
disconnected.
2) Turn the ignition switch to ON.
Does the malfunction indicator
light blink?
System is normal.
NOTE:
Malfunction indica-
tor light blinks at a
cycle of 3 Hz when
delivery
(test)
mode connector is
connected.
2
CHECK HARNESS BETWEEN ECM AND DE-
LIVERY (TEST) MODE CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ECM.
3) Measure the resistance between ECM con-
nector and chassis ground.
Connector & terminal
(B136) No. 34 — Chassis ground:
Is the resistance 1 MΩ or
more?
Repair the short
circuit to ground in
harness between
ECM connector
and delivery (test)
mode connector.
EN(H4DOTC)(diag)-74
Diagnostics for Engine Starting Failure
ENGINE (DIAGNOSTICS)
17.Diagnostics for Engine Starting Failure
A: PROCEDURE
1. Check of the fuel amount
↓
↓
↓
↓
↓
EN(H4DOTC)(diag)-75
Diagnostics for Engine Starting Failure
ENGINE (DIAGNOSTICS)
B: STARTER MOTOR CIRCUIT
CAUTION:
After servicing or replacing faulty parts, perform Clear Memory Mode <Ref. to EN(H4DOTC)(diag)-63,
OPERATION, Clear Memory Mode.>, and Inspection Mode <Ref. to EN(H4DOTC)(diag)-49, PROCE-
WIRING DIAGRAM:
• Engine electrical system, without SI-DRIVE <Ref. to WI-32, WITHOUT SI-DRIVE, WIRING DIAGRAM,
• Engine electrical system, with SI-DRIVE <Ref. to WI-48, WITH SI-DRIVE, WIRING DIAGRAM, Engine
Step
Check
Yes
No
1
CHECK BATTERY.
Check the battery. <Ref. to SC(STI)-27, Bat-
tery.>
Is the battery OK?
Charge or replace
the battery. <Ref.
to SC(STI)-27,
Battery.>
2
CHECK OPERATION OF STARTER MOTOR. Does the starter motor oper-
ate?
ECM
13
14
15 16
17
27
24
25
26
20
21
22
23
29
30
31
28
32 35
33
34
37
38
39
36
40
8
9
10
11 12
1
2
5
3
4
7
6
19
18
B225
1
2
B106
B106
1
2
5
6
7
2
1
3
4
29
10 11 12 13 14 15
25
24
16
30
9
8
17 18 19
20
28
21 22 23
32
31
26 27
33
34 35
EN-09249
16
10 11 12 13 14 15
25
24
30
9
8
7
17 18 19 20
28
21 22 23
29
32
31
1
2
3
4
5
6
27
26
33 34 35
B72
1
3
4 5 6
2
6
2
3
B14
B72
C: B136
C: B136
B: B135
B: B135
0
1
2
1
9
1
1
B225
C16
B26
SBF-6
E
M
F/B No. 21
MAIN SBF
BATTERY
IGNITION
SWITCH
STARTER
RELAY
STARTER MOTOR
CLUTCH
START
SWITCH
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