Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Forester 1999-2004 Approved Subaru Forester 1999-2000 FUEL AND OBD II On-Board Diagnostics II System MSA5T0123A27485
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2-7 [T9A0] DIAGNOSTICS 9. General Diagnostic Table 9. General Diagnostic Table A: GENERAL DIAGNOSTICS TABLE WITH NON-CONFORMITY SYMPTOM FOR ENGINE NOTE: Malfunction of parts other than those listed is also possible.Symptom Problem parts 1) Idle air control solenoid valve 2) Intake air temperature and pressure sensor 3) Ignition parts (*1) 1. Engine stalls during idling. 4) Engine coolant temperature sensor (*2) 5) Crankshaft position sensor (*3) 6) Camshaft position sensor (*3) 7) Fuel injection parts (*4) 1) Idle air control solenoid valve 2) Intake air temperature and pressure sensor 3) Engine coolant temperature sensor (*2) 4) Ignition parts (*1) 5) Air intake system (*5) 2. Rough idling 6) Fuel injection parts (*4) 7) Throttle position sensor 8) Crankshaft position sensor (*3) 9) Camshaft position sensor (*3) 10) Oxygen sensor 11) Fuel pump and fuel pump relay 1) Idle air control solenoid valve 2) Engine coolant temperature sensor 3. Engine does not return to idle. 3) Accelerator cable (*6) 4) Throttle position sensor 5) Intake air temperature and pressure sensor 1) Intake air temperature and pressure sensor 2) Throttle position sensor 3) Fuel injection parts (*4) 4) Fuel pump and fuel pump relay 5) Engine coolant temperature sensor (*2) 4. Poor acceleration 6) Crankshaft position sensor (*3) 7) Camshaft position sensor (*3) 8) A/C switch and A/C cut relay 9) Engine torque control signal circuit 10) Ignition parts (*1) 1) Intake air temperature and pressure sensor 2) Engine coolant temperature sensor (*2) 3) Crankshaft position sensor (*3) 5. Engine stalls or engine sags or hesitates at 4) Camshaft position sensor (*3) acceleration. 5) Purge control solenoid valve 6) Fuel injection parts (*4) 7) Throttle position sensor 8) Fuel pump and fuel pump relay 1) Intake air temperature and pressure sensor 2) Engine coolant temperature sensor (*2) 3) Crankshaft position sensor (*3) 6. Surge 4) Camshaft position sensor (*3) 5) Fuel injection parts (*4) 6) Throttle position sensor 7) Fuel pump and fuel pump relay 86 DIAGNOSTICS [T9B0] 2-7 9. General Diagnostic Table Symptom Problem parts 1) Intake air temperature and pressure sensor 2) Engine coolant temperature sensor 7. Spark knock 3) Knock sensor 4) Fuel injection parts (*4) 5) Fuel pump and fuel pump relay 1) Intake air temperature and pressure sensor 2) Engine coolant temperature sensor (*2) 8. After burning in exhaust system 3) Fuel injection parts (*4) 4) Fuel pump and fuel pump relay *1: Check ignition coil & ignitor assembly and spark plug. *2: Indicate the symptom occurring only in cold temperatures. *3: Ensure the secure installation. *4: Check fuel injector, fuel pressure regulator and fuel filter. *5: Inspect air leak in air intake system. *6: Adjust accelerator cable. B: GENERAL DIAGNOSTICS TABLE WITH NON-CONFORMITY SYMPTOM FOR AUTOMATIC TRANSMISSION NOTE: Check general diagnostics table with non-conformity symptom for automatic transmission. 87
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