Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Forester 1999-2004 Approved Subaru Forester 2004 2 - Engine Section (H4DOTC) ENGINE (DIAGNOSTICS) Malfunction Indicator Light
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MALFUNCTION INDICATOR LIGHT
ENGINE (DIAGNOSTICS)
15.Malfunction Indicator Light
A: PROCEDURE
1. Activation of check malfunction indicator light.
2. Check that the malfunction indicator light does not come on.
3. Check that the malfunction indicator light does not go off.
4. Check that the malfunction indicator light does not blink at a cycle of 3 Hz.
5. Check that the malfunction indicator light remains blinking at a cycle of 3 Hz.
EN(H4DOTC)-47
MALFUNCTION INDICATOR LIGHT
ENGINE (DIAGNOSTICS)
B: ACTIVATION OF MALFUNCTION 3) If the diagnosis system senses a misfire which
INDICATOR LIGHT could damage the catalyzer, the malfunction indi-
cator light will blink at a cycle of 1 Hz.
1) When the ignition switch is turned to ON (engine
off), the malfunction indicator light in the combina-
tion meter illuminates. (1)
NOTE: (2)
If the malfunction indicator light does not illuminate,
(3)
perform diagnostics of the malfunction indicator
light circuit or the combination meter circuit.
EN-01680
(1) ON
(2) OFF
(3) Ignition switch ON
(4) Engine start
(5) Misfire start
(6) 1 second
4) When the ignition switch is turned to ON (engine
(1) EN-00157 off) or to START with the test mode connector con-
nected, the malfunction indicator light blinks at a
(1) Malfunction indicator light cycle of 3 Hz.
2) After starting the engine, the malfunction indica-
tor light goes out. If it does not, either the engine or (1)
the emission control system is malfunctioning.
(2)
(1)
(3) (4)
(4)
(3)
(2)
(3)
(4) EN-01681
(5)
(1) ON
(6) (2) OFF
EN-01679
(3) Ignition switch ON
(1) No trouble (4) 1 second
(2) Trouble occurs
(3) ON
(4) OFF
(5) Ignition switch ON
(6) Engine start
EN(H4DOTC)-48
MALFUNCTION INDICATOR LIGHT
ENGINE (DIAGNOSTICS)
C: MALFUNCTION INDICATOR LIGHT DOES NOT COME ON.
DIAGNOSIS:
The malfunction indicator light circuit is shorted.
TROUBLE SYMPTOM:
When the ignition switch is turned to ON (engine OFF), malfunction indicator light does not come on.
WIRING DIAGRAM:
IGNITION
B72 SWITCH BATTERY
No.14 SBF-4 SBF-1
4 1
B36
5
i1
B9
A1
COMBINATION
METER
i3
17
A: i12 B38
B: i10
17
ECM
B134 E
B: i10 B72 A: i12
1 2 3 4 5 6 7 8 9 10 11 12 13 14 1 2 1 2 3 4 5 6
15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 3 4 7 8 9 10 11 12 13 14
B36 B38 B134
1 2 3 4 5 6 7 8 9 10 11 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7
12 13 14 15 16 17 18 19 20 21 22 23 24 10 11 12 13 14 15 16 17 18 19 20 21 8 9 10 11 12 13 14 15 16 17
22 23 24 25 26 27 28 29 30 31 32 18 19 20 21 22 23 24 25 26 27
28 29 30 31 32 33 34
EN-02013
EN(H4DOTC)-49
MALFUNCTION INDICATOR LIGHT
ENGINE (DIAGNOSTICS)
Step Check Yes No
1 CHECK OUTPUT SIGNAL FROM ECM. Is the voltage less than 1 V? Go to step 4. Go to step 2.
1) Turn the ignition switch to ON.
2) Measure the voltage between ECM con-
nector and chassis ground.
Connector & terminal
(B134) No. 17 (+) -- Chassis ground (-):
2 CHECK POOR CONTACT. Does the malfunction indicator Repair the poor Go to step 3.
light come on when shaking or contact in ECM
pulling ECM connector and connector.
harness?
3 CHECK ECM CONNECTOR. Is the ECM connector correctly Replace the ECM. Repair the con-
connected?
4 CHECK HARNESS BETWEEN COMBINA- Is the resistance less than 1 Go to step 5. Repair the har-
TION METER AND ECM CONNECTOR. ? ness and connec-
1) Turn the ignition switch to OFF. tor.
2) Remove the combination meter. In this case, repair
3) Disconnect the connector from ECM and the following:
combination meter. ◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo