Subaru Outback manuals

Subaru Outback: Basic Diagnostic Procedure

A: PROCEDURE

1. ENGINE

Subaru Outback. Engine (Diagnostics)

Subaru Outback. Engine (Diagnostics)

Check List for Interview

A: CHECK

1. CHECK LIST NO. 1

Check the following item when problem has occurred.

NOTE: Use copies of this page for interviewing customers.

Subaru Outback. Engine (Diagnostics)

2. CHECK LIST NO. 2

Check the following item about the vehicle's state when the malfunction indicator light turns on.

NOTE: Use copies of this page for interviewing customers.

Subaru Outback. Engine (Diagnostics)

General Description

A: CAUTION

1) Airbag system wiring harness is routed near the ECM, main relay and fuel pump relay.

CAUTION:

2) Never connect the battery in reverse polarity.

Doing so will damage the ECM instantly, and other parts will also be damaged.

3) Do not disconnect the battery terminals while the engine is running. A large counter electromotive force will be generated in the generator, and this voltage may damage electronic parts such as ECM etc.

4) Before disconnecting the connectors of each sensor and ECM, be sure to turn the ignition switch to OFF. Perform the Clear Memory Mode after connecting the connectors. <Ref. to EN(H4SO)(diag)- 51, Clear Memory Mode.>

5) When measuring the voltage or resistance of individual sensor or all electrical control modules, use a tapered pin with a diameter of less than 0.6 mm (0.024 in). Do not insert the pin 4 mm (0.16 in) or more into the part.

CAUTION: When replacing the ECM, be careful not to use the wrong spec. ECM to avoid any damage on the fuel injection system.

NOTE: When replacing the ECM of the models with Immobilizer, immobilizer system must be registered. To do so, all ignition keys and ID cards need to be prepared.

Refer to the "PC application help for Subaru Select Monitor".

6) Take care not to allow water to get into the connectors when servicing or washing the vehicle in rainy weather. Avoid exposure to water even if the connectors are waterproof.

7) Use ECM mounting stud bolts at the body side grounding point when measuring voltage and resistance inside the passenger compartment.

Subaru Outback. Engine (Diagnostics)

  1. Stud bolt

8) Use the engine ground terminal or engine assembly for the grounding point to chassis when measuring the voltage and resistance in engine compartment.

Subaru Outback. Engine (Diagnostics)

9) Every engine control system-related part is a precision part. Do not drop them.

10) Observe the following cautions when installing a radio in vehicle.

CAUTION:

11) When disconnecting the fuel hose, release the fuel pressure. <Ref. to FU(H4SO)-53, RELEASING OF FUEL PRESSURE, PROCEDURE, Fuel.>

12) Warning lights may illuminate when performing driving test with jacked-up or lifted-up condition, but this is not a system malfunction. The reason for this is the speed difference between the front and rear wheels. When engine control system diagnosis is finished, perform the VDC memory clearance procedure of self-diagnosis function. <Ref. to VDC(diag)- 25, Clear Memory Mode.>

B: INSPECTION

Before performing diagnostics, check the following item which might affect engine problems.

1. BATTERY

1) Measure the battery voltage and specific gravity of the electrolyte.

Standard voltage: 12 V
Specific gravity: 1.260 or more

2) Check the condition of the main and other fuses, and harnesses and connectors. Also check for proper grounding.

2. ENGINE GROUND

Make sure that the engine ground terminal has no contamination, corrosion or looseness and is properly connected to the engine.

Subaru Outback. Engine (Diagnostics)

C: NOTE

D: PREPARATION TOOL

Subaru Outback. Engine (Diagnostics)

Electrical Component Location

A: LOCATION

1. CONTROL MODULE

Subaru Outback. Engine (Diagnostics)

  1. Engine control module (ECM)
  2. Malfunction indicator light
  3. Delivery (test) mode fuse
  4. Data link connector

Subaru Outback. Engine (Diagnostics)

2. SENSOR

Subaru Outback. Engine (Diagnostics)

  1. Mass air flow and intake air temperature sensor
  2. Manifold absolute pressure sensor
  3. Engine coolant temperature sensor
  4. Electronic throttle control
  5. Knock sensor
  6. Camshaft position sensor
  7. Crankshaft position sensor
  8. Engine oil temperature sensor

Subaru Outback. Engine (Diagnostics)

Subaru Outback. Engine (Diagnostics)

  1. Front oxygen (A/F) sensor
  2. Rear oxygen sensor
  3. Front catalytic converter
  4. Rear catalytic converter

Subaru Outback. Engine (Diagnostics)

  1. Fuel level sensor
  2. Fuel temperature sensor
  3. Fuel tank pressure sensor
  4. Fuel sub level sensor

Subaru Outback. Engine (Diagnostics)

3. SOLENOID VALVE, ACTUATOR, EMISSION CONTROL SYSTEM PARTS AND IGNITION SYSTEM PARTS

Subaru Outback. Engine (Diagnostics)

  1. Purge control solenoid valve
  2. EGR control valve
  3. Oil switching solenoid valve
  4. Variable valve lift diagnosis oil pressure switch

Subaru Outback. Engine (Diagnostics)

  1. Starter
  2. Fuel pump
  3. Main relay
  4. IG relay
  5. A/F, oxygen sensor relay
  6. Electronic throttle control relay
  7. Fuel pump relay
  8. Radiator main fan relay 1
  9. Radiator main fan relay 2
  10. Radiator sub fan relay
  11. Starter relay
  12. Canister
  13. Drain valve
  14. Drain filter

Subaru Outback. Engine (Diagnostics)

4. TRANSMISSION

Subaru Outback. Engine (Diagnostics)

  1. Inhibitor switch (CVT model)
  2. Neutral position switch (MT model)

READ NEXT:

 Engine Control Module (ECM) I/O Signal

A: ELECTRICAL SPECIFICATION Input/output name: Crankshaft position sensor Camshaft position sensor Measuring condition: After warming-up At idling Engine Condition Data A: ELECTRICAL

 Inspection Mode

A: PROCEDURE Perform the diagnosis shown in the following DTC table. When performing the diagnosis not listed in "List of Diagnostic Trouble Code (DTC)", refer to the item on the drive cycle. <Re

 Drive Cycle

A: PROCEDURE It is necessary to perform the drive cycle listed below if DTC is not found in the Inspection Mode. It is possible to complete diagnosis of the DTC by performing the indicated drive cycl

SEE MORE:

 Flywheel

A: REMOVAL 1) Remove the transmission assembly. <Ref. to 6MT-25, REMOVAL, Manual Transmission Assembly.> 2) Remove the clutch cover and clutch disc. <Ref. to CL-11, REMOVAL, Clutch Disc and Cover.> 3) Using the ST, remove the flywheel. ST 498497100 CRANKSHAFT STOPPER Flywheel B: I

 Front Grille

A: REMOVAL 1) Remove the front bumper face assembly. Remove the clips, turn over the front mud guard, and disconnect the fog light connector. (Model with fog light) Remove the clips at the upper side of the bumper. Remove the clips from the fender. Remove the clips at the lower side of bu

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