Subaru Legacy III (2000-2003 year). Service manual — part 470
EN(H4DOSTC)-50
ENGINE (DIAGNOSTICS)
ENGINE MALFUNCTION INDICATOR LAMP (MI)
MEMO:
EN(H4DOSTC)-51
ENGINE (DIAGNOSTICS)
DIAGNOSTICS FOR ENGINE STARTING FAILURE
15.Diagnostics for Engine Starting Failure
A: PROCEDURE
1.
Inspection of starter motor circuit. <Ref. to EN(H4DOSTC)-52, STARTER MOTOR CIRCUIT, Diagnostics for Engine Starting
↓
2.
Inspection of ECM power supply and ground line. <Ref. to EN(H4DOSTC)-56, CONTROL MODULE POWER SUPPLY AND
GROUND LINE, Diagnostics for Engine Starting Failure.>
↓
3.
Inspection of fuel pump circuit. <Ref. to EN(H4DOSTC)-60, FUEL PUMP CIRCUIT, Diagnostics for Engine Starting Failure.>
EN(H4DOSTC)-52
ENGINE (DIAGNOSTICS)
DIAGNOSTICS FOR ENGINE STARTING FAILURE
B: STARTER MOTOR CIRCUIT
CAUTION:
After repair or replacement of faulty parts, conduct CLEAR MEMORY MODE <Ref. to EN(H4DOSTC)-
35, Clear Memory Mode.> and INSPECTION MODE <Ref. to EN(H4DOSTC)-33, Inspection Mode.> .
• WIRING DIAGRAM:
EN-00930
BATTERY
IGNITION
SWITCH
STARTER
MOTOR
SBF-4
SBF-1
B72
B72
B14
B134 ECM
E
E
1
3
16
3 4
1 2
B134
B12
T7
1 2 3 4
10 11 12
19 20 21
13
5
6
14 15
7
8 9
16 17
18
22
12
INHIBITOR SWITCH
7
P
R
N
D
3
2
1
12
11
T7
T3
B12
AT
AT
MT
MT
1 2 3 4 5 6
7 8 9 10 11 12
1 2 3 4
5 6 7 8
9 10 11 12
EN(H4DOSTC)-53
ENGINE (DIAGNOSTICS)
DIAGNOSTICS FOR ENGINE STARTING FAILURE
Step
Value
Yes
No
1
CHECK OPERATION OF STARTER MOTOR.
Does the starter motor operate when the
switch starts?
Operates.
2
CHECK DTC.
Is DTC displayed?
DTC is indicated.
Check DTC using
“List of Diagnostic
Trouble Code
(DTC)”. <Ref. to
EN(H4DOSTC)-
62, List of Diag-
nostic Trouble
Code (DTC).>
Repair poor con-
tact in ECM con-
nector.
3
CHECK INPUT SIGNAL FOR STARTER MO-
TOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from starter
motor.
3) Turn the ignition switch to ST.
4) Measure the power supply voltage between
starter motor connector terminal and
engine ground.
Connector & terminal
(B14) No. 1 (+) — Engine ground (
−−−−
):
Does the measured value exceed the spec-
ified value?
NOTE:
On AT vehicles, place the selector lever in the
“P” or “N” position.
10 V
4
CHECK GROUND CIRCUIT OF STARTER
MOTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the terminal from starter motor.
3) Measure the resistance of ground cable
between ground cable terminal and engine
ground.
Is the measured value less than the speci-
fied value?
5
Ω
Check the starter
motor. <Ref. to
SC(H4DOSTC)-6,
Starter.>
Repair the open
circuit of ground
cable.
5
CHECK HARNESS BETWEEN BATTERY
AND IGNITION SWITCH CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ignition
switch.
3) Measure the power supply voltage between
ignition switch connector and chassis
ground.
Connector & terminal
(B72) No. 1 (+) — Chassis ground (
−−−−
):
Does the measured value exceed the spec-
ified value?
10 V
Repair the open
circuit in harness
between ignition
switch and battery,
and check fuse
SBF No. 4 and
SBF No. 1.
6
CHECK IGNITION SWITCH.
1) Disconnect the connector from ignition
switch.
2) Measure the resistance between ignition
switch terminals while turning ignition
switch to the “ST” position.
Terminals
No. 1 — No. 3:
Is the measured value less than specified
value?
5
Ω
Replace the igni-
tion switch.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст