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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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. 




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