Engine Mechanical (H4DOTC): Diagnosis Subaru Forester SJ

INSPECTION

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1. After warming-up the engine, turn the ignition switch to OFF.
2. Make sure that the battery is fully charged.
3. Check the starter motor for satisfactory performance and operation.
4. Remove the fuse of fuel pump from main fuse box.
5. Start the engine and run it until it stalls.
6. After the engine stalls, crank it for five more seconds.
7. Turn the ignition switch to OFF.
8. Remove all spark plugs. < Ref. to «REMOVAL»(ref-662115-S05981722472014101300000) , Spark Plug. >
9. Install the compression gauge to the spark plug hole. NOTE: When using a screw-in type compression gauge, the screw should be less than 25 mm (0.98 in) long.
10. Install the engine control module (ECM). < Ref. to «INSTALLATION»(ref-662119-S42127221602014101300000) , Engine Control Module (ECM). >
11. Install the battery. < Ref. to «INSTALLATION»(ref-662144-S27539781662014101300000) , Battery. >
12. Turn the ignition switch to ON.
13. Fully open the throttle valve.
14. Crank the engine by starter motor and read the value when the needle of the compression gauge becomes stable. NOTE: Perform at least two measurements per cylinder, and make sure that the values are correct. If the compression pressure is out of standard, check or adjust the pistons, valves and cylinders. Compression (fully open throttle): Standard 1, 350 - 1, 750 kPa (14 - 18 kgf/cm 2 , 196 - 254 psi) Difference between cylinders 100 kPa (1 kgf/cm 2 , 14 psi) or less
15. After inspection, install the related parts in the reverse order of removal. NOTE: When compression pressure is checked, the malfunction indicator light illuminates and DTC (P0087) may be stored in ECM. When the malfunction indicator light has illuminated, perform the Clear Memory Mode. < Ref. to «CLEAR MEMORY MODE»(ref-662148-S31627197202014101300000) . >

1. Before checking the idle speed, check the following item: Check the air cleaner element is free from clogging, ignition timing is correct, spark plugs are in good condition, and hoses are connected properly. Check the malfunction indicator light does not illuminate.
2. Warm up the engine.
3. Read the engine idle speed using Subaru Select Monitor. < Ref. to «DISPLAY CURRENT ENGINE DATA»(ref-662148-S33420959492014101300000) , OPERATION, Subaru Select Monitor. > NOTE: Idle speed cannot be adjusted manually, because the idle speed is automatically adjusted. If idle speed is out of standard, refer to the General Diagnosis Table under "Engine Control System". < Ref. to «BASIC DIAGNOSTIC PROCEDURE»(ref-662148-S33644729392014101300000) . > Check the idle speed when no-loaded. (Headlight, blower fan, rear defroster, radiator fan, A/C and etc. are OFF) Idle RPM (no load and select lever in "P" or "N" range): Standard 700±100 RPM Check the idle speed when loaded. (Turn the A/C switch to ON and operate the compressor for at least one minute before measurement.) Idle speed (A/C ON and select lever in "P" or "N" range): Standard 700 - 835±50 RPM

1. Before checking the ignition timing, check the following item: Check the air cleaner element is free from clogging, spark plugs are in good condition, and hoses are connected properly. Check the malfunction indicator light does not illuminate.
2. Warm up the engine.
3. Read the ignition timing using Subaru Select Monitor. < Ref. to «DISPLAY CURRENT ENGINE DATA»(ref-662148-S33420959492014101300000) , OPERATION, Subaru Select Monitor. > NOTE: If ignition timing is out of standard, check the ignition control system. Refer to "Engine Control System". < Ref. to «BASIC DIAGNOSTIC PROCEDURE»(ref-662148-S33644729392014101300000) . > Ignition timing [BTDC/RPM]: Standard 10°±10°/700

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1. Remove the clip (A), lift the front of the collector cover in the direction of arrow, and then remove the collector cover.
2. Warm up the engine.
3. Disconnect the brake booster vacuum hose from the intake manifold.
4. Connect the vacuum gauge to the intake manifold.
5. Keep the engine at idle speed and read the vacuum gauge indication. NOTE: Condition of engine inside can be diagnosed by observing the behavior of the vacuum gauge needle as described in table below. Intake manifold vacuum (at idling, A/C OFF): Standard -60.0 kPa (-450 mmHg, -17.72 inHg) or more Diagnosis of engine condition by inspection of intake manifold vacuum Vacuum gauge needle behavior Possible engine condition 1. Needle is steady but lower than standard value. This tendency becomes more evident as engine temperature rises. Leakage around intake manifold gasket, disconnection or damage of vacuum hose 2. Needle intermittently drops to position lower than standard value. Leakage around cylinder 3. Needle drops suddenly and intermittently from standard value. Sticky valve 4. When engine speed is gradually increased, needle begins to vibrate rapidly at certain speed, and then vibration increases as engine speed increases. Weak or broken valve springs 5. Needle vibrates above and below standard value in narrow range. Defective ignition system
6. After inspection, install the related parts in the reverse order of removal.

Scheme 507

1. Disconnect the ground cable from battery.
2. Remove the oil pressure switch. < Ref. to «REMOVAL»(ref-662113-S34653955542014101300000) , Oil Pressure Switch. >
3. Install the oil pressure gauge to the chain cover.
4. Connect the battery ground terminal.
5. Start the engine, and check the oil pressure. NOTE: Standard value is based on an engine oil temperature of 80°C (176°F). If the oil pressure is out of specification, check oil pump, oil filter and lubrication line. < Ref. to «INSPECTION»(ref-662113-S38137378902014101300000) , Engine Lubrication System Trouble in General. > If the oil pressure warning light is ON and oil pressure is within standard, check the oil pressure switch. < Ref. to «INSPECTION»(ref-662113-S38137378902014101300000) , Engine Lubrication System Trouble in General. > Engine oil pressure: Standard 50 kPa (0.5 kgf/cm 2 , 7 psi) or more (at 600 RPM) 350 kPa (3.6 kgf/cm 2 , 51 psi) or more (at 6, 000 RPM)
6. After inspection, install the related parts in the reverse order of removal.

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1. Remove the clip (A), lift the front of the collector cover in the direction of arrow, and then remove the collector cover.
2. Release the fuel pressure. < Ref. to «RELEASING OF FUEL PRESSURE»(ref-662119-S23335610212014101300000) , PROCEDURE, Fuel. >
3. Open the fuel filler lid and remove the fuel filler cap.
4. Disconnect the fuel delivery tube from the fuel delivery pipe, and connect the fuel pressure gauge. Disconnect the quick connector on the fuel delivery tube from the fuel pipe assembly, and remove the clip (A) securing the fuel delivery tube to the fuel pipe assembly. NOTE: Disconnect the quick connector as shown in the figure. Connect the fuel pressure gauge with ST1 and ST2. CAUTION: Check that there is no damage or dust on the quick connector. If necessary, clean the seal surface of the ST2. When connecting the quick connector with slider, make sure to insert the pipe all the way in before locking the slider. When it is difficult to lock the slider, check that the pipe is fully inserted. Make sure that the quick connector is securely connected. NOTE: ST1 is a SUBARU genuine part. When connecting the ST2 to the quick connector on the fuel delivery tube, connect as shown in the figure. ST1 42075AG690 FUEL HOSE ST2 18471AA000 FUEL PIPE ADAPTER
5. Start the engine.
6. Check the fuel pressure after warming up the engine. NOTE: The fuel pressure gauge registers 10 to 20 kPa (0.1 to 0.2 kgf/cm 2 , 1 to 3 psi) higher than standard values during high-altitude operations. Check or replace the fuel pump and fuel delivery line if the fuel pressure is out of the standard. Fuel pressure: Standard 340 - 400 kPa (3.5 - 4.1 kgf/cm 2 , 49 - 58 psi)
7. After inspection, install the related parts in the reverse order of removal. CAUTION: Before removing the fuel pressure gauge, release the fuel pressure. Be careful not to spill fuel. Catch the fuel from hoses and tubes using a container or cloth. Check that there is no damage or dust on the quick connector. If necessary, clean the seal surface of the pipe. When connecting the quick connector with slider, make sure to insert the pipe all the way in before locking the slider. When it is difficult to lock the slider, check that the pipe is fully inserted. Make sure that the quick connector is securely connected. NOTE: When disconnecting the ST1, install the ST2 to the fuel pipe assembly, and press the ST2 in the direction of arrow to disconnect the quick connector on the ST1. ST1 42075AG690 FUEL HOSE ST2 42099AE000 QUICK CONNECTOR RELEASE Disconnect the quick connector on the fuel delivery tube as shown in the figure. Connect the quick connector on the fuel delivery tube as shown in the figure.

1. Check that pipes, hoses, connectors and clamps are installed firmly.
2. Check the engine coolant is at specified level.
3. Check CVTF is at the specified level.
4. Start the engine and check for exhaust gas, engine coolant, leaks of fuel, etc. Also check for noise and vibrations.

Make sure that there are no cracks or other damages.

Scheme 515

1. After engine has been removed from the vehicle, mount the engine to the engine stand while being careful of the following. When mounting the engine stand, follow the instructions of engine stand used. When disassembling the cylinder block, remove the crankshaft position sensor plate together with the drive plate first, and then mount the engine stand. < Ref. to «REMOVAL»(ref-662126-S07134706032014101300000) , Drive Plate. > Mount the engine stand using the points shown by the arrows in the figure. CAUTION: Be sure to mount the engine stand at four points. Otherwise, the engine damage may occur. NOTE: For points (A), either of them can be used for mounting the engine stand. The engine stand shown in the figure is just for reference.
2. In this section, the procedures described under each index are all connected and stated in order. The procedure for overhauling of the engine will be completed when you go through all steps in the process. Therefore, in this section, to conduct the particular procedure within the flow of a section, you need to go back and conduct the procedure described previously in order to do that particular procedure.

Check that the chain cover does not have deformation, cracks and any other damage.

1. Check the timing chain, chain guide, chain tensioner lever and chain tensioner for deformation, cracks or other damages.
2. Check the chain guide and chain tensioner lever for abnormal wear.

Check the cam sprocket teeth for abnormal wear and scratches.

1. Check the crank sprocket teeth for abnormal wear and scratches.
2. Make sure there is no free play between crank sprocket and key.

Check that the rocker cover does not have deformation, cracks and any other damage.

Note. The "RANK" shown in the chart shows the possibilities of the cause of trouble in order from "Very often" to "Rarely".

A - Very often

B - Sometimes

C - Rarely