Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Forester 1999-2004 Approved Subaru Forester 2004 2 - Engine Section (H4SO) Engine (Diagnostics) Malfunction Indicator Light
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MALFUNCTION INDICATOR LIGHT ENGINE (DIAGNOSTICS) 16.Malfunction Indicator Light A: PROCEDURE 1. Activation of malfunction indicator light.2. Malfunction indicator light does not come on. 3. Malfunction indicator light does not go off. 4. Malfunction indicator light does not blink at a cycle of 3 Hz. 5. Malfunction indicator light remains blinking at a cycle of 3 Hz. EN(H4SO)-52 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 (1) in the combi- nation 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-00197 (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 test mode connector con- nected, the malfunction indicator light blinks at a 2) After starting the engine, the malfunction indica- cycle of 3 Hz. tor light goes out. If it does not, either the engine or the emission control system is malfunctioning. (1) (1) (3) (2) (4) (4) (2) (3) (3) (4) (5) EN-00198 (6) EN-00196 (1) ON (1) No trouble (2) OFF (2) Trouble occurs (3) Ignition switch ON (3) ON (4) 1 second (4) OFF (5) Ignition switch ON (6) Engine start EN(H4SO)-53 MALFUNCTION INDICATOR LIGHT ENGINE (DIAGNOSTICS) C: MALFUNCTION INDICATOR LIGHT DOES NOT COME ON. DIAGNOSIS: The malfunction indicator light circuit is open or shorted. TROUBLE SYMPTOM: When the ignition switch is turned ON (engine OFF), malfunction indicator light does not come on. WIRING DIAGRAM: IGNITION B72 BATTERY SWITCH No.14 SBF-4 SBF-1 4 1 B36 5 i1 B9 A1 i3 COMBINATION 17 METER B38 A: i12 28 C: i10 B134 ECM B72 B134 B38 1 2 3 4 5 6 7 8 1 2 1 2 3 4 5 6 7 8 9 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 3 4 10 11 12 13 14 15 16 17 18 19 20 21 24 25 26 27 28 29 30 31 32 33 34 35 22 23 24 25 26 27 28 29 30 31 32 i10 B36 i12 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1 2 3 4 5 6 7 8 9 10 11 1 2 3 4 5 6 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 12 13 14 15 16 17 18 19 20 21 22 23 24 7 8 9 10 11 12 13 14 EN-02055 EN(H4SO)-54 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. 28 (+) -- Chassis ground (-): 2 CHECK POOR CONTACT. Does the malfunction indicator Repair poor con- Go to step 3. Check poor contact by shaking or pulling ECM light illuminate? tact in ECM con- connector and harness. nector. 3 CHECK ECM CONNECTOR. Is the ECM connector correctly Replace the ECM. Repair connection Check the ECM connector connection. connected? 4 CHECK HARNESS BETWEEN COMBINA- Is the resistance less than 1 Go to step 5. Repair harness TION METER AND ECM CONNECTOR. ? and connector. 1) Turn the ignition switch to OFF. NOTE: 2) Remove the combination meter. the following: 3) Disconnect the connector from ECM and
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