Engine Controls - Engine (Diagnostics) (H4SO - 2.5L SOHC): Other Subaru Outback BR

CHECK LIST NO. 1

Check the following item when problem has occurred.

Note. Use copies of this page for interviewing customers.

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CHECK LIST NO. 2

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

Note. Use copies of this page for interviewing customers.

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1. Airbag system wiring harness is routed near the ECM, main relay and fuel pump relay. CAUTION: Do not use electrical test equipment on the airbag system circuit. Be careful not to damage the airbag system wiring harness when servicing the ECM, TCM, main relay and fuel pump relay.
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 «CLEAR MEMORY MODE»(ref-371914-S07670654082010091900000) .
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.
8. Use the engine ground terminal or engine assembly for the grounding point to chassis when measuring the voltage and resistance in engine compartment.
9. Every MFI-related part is a precision part. Do not drop them.
10. Observe the following cautions when installing a radio in vehicle. CAUTION: The antenna must be kept as far apart as possible from control module. (ECM is installed at the back of the glove box.) The antenna feeder must be placed as far apart as possible from the ECM and engine control system harness. Carefully adjust the antenna for correct matching. When mounting a large power type radio, pay special attention to the three items mentioned above. Incorrect installation of the radio may affect the operation of ECM.
11. When disconnecting the fuel hose, release the fuel pressure. Ref. to «RELEASING OF FUEL PRESSURE»(ref-371892-S35824116682010091900000) , PROCEDURE, Fuel.
12. For the model with ABS, the ABS warning light 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 «CLEAR MEMORY MODE»(ref-371926-S09999057382010091900000) .

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.

ENGINE GROUND

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

NOTE

1. The on-board diagnostic (OBD) system detects and indicates a fault in various inputs and outputs of the complex electronic control. Malfunction indicator light in the combination meter indicates occurrence of a fault or trouble.
2. Further, against such a failure of sensors as may disable the drive, the fail-safe function is provided to ensure the minimal driveability.
3. The OBD system incorporated with the vehicles within this type of engine complies with OBD-II regulations. The OBD system monitors the components and the system malfunction listed in "Engine article" which affects on emissions.
4. When the system decides that a malfunction occurs, malfunction indicator light illuminates. At the same time of the malfunction indicator light illumination or blinking, a DTC and a freeze frame engine conditions are stored into on-board computer.
5. The OBD system stores freeze frame engine condition data (engine load, engine coolant temperature, fuel trim, engine speed and vehicle speed, etc.) into on-board computer when it detects a malfunction.
6. Freeze frame engine condition data are stored until the DTCs are cleared. However when such malfunctions as fuel trim fault and misfire are detected with the freeze frame engine condition data stored, they are rewritten into those related to the fuel trim fault and misfire.
7. When the malfunction does not occur again for three consecutive driving cycles, malfunction indicator light is turned off, but DTC remains at onboard computer.
8. When performing diagnosis, connect the Subaru Select Monitor or general scan tool to the vehicle.

PREPARATION TOOL

PREPARATION TOOL DESCRIPTION CHART ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS 1B022XU0 SUBARU SELECT MONITOR III KIT Used for troubleshooting the electrical system. 499987500 CRANKSHAFT SOCKET Used for rotating crankshaft

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CONNECTOR TERMINALS REFERENCE CHART

Input/output name

1. Crankshaft position sensor
2. Camshaft position sensor

Measuring condition

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1. After warming-up
2. At idling

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This connector is used for Subaru Select Monitor.

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CONNECTOR TERMINALS REFERENCE CHART

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1. Prepare a scan tool (general scan tool) required by SAE J1978.
2. Connect the general scan tool to the data link connector located in the lower portion of the instrument panel (on the driver's side).
3. Using the general scan tool, call up DTC and freeze frame data. General scan tool functions consist of: MODE $01: Current powertrain diagnostic data MODE $02: Powertrain freeze frame data MODE $03: Emission-related powertrain DTC MODE $04: Clear/Reset emission-related diagnostic information MODE $06: Request on-board monitoring test results for intermittently monitored systems MODE $07: Request on-board monitoring test results for continuously monitored systems MODE $09: Request vehicle information Read out the data according to repair procedures. (For detailed operation procedure, refer to the general scan tool operation manual.) NOTE: For details concerning DTC, refer to "List of Diagnostic Trouble Code (DTC)". Ref. to «LIST OF DIAGNOSTIC TROUBLE CODE (DTC)»(ref-371914-S32414380772010091900000) .

MODE $02 (POWERTRAIN FREEZE FRAME DATA)

Refer to data denoting the operating condition when trouble is sensed by the on-board diagnosis system. A list of the support data and PID (Parameter Identification) codes are shown in the following table.

PID DATA REFERENCE CHART

Note. Refer to general scan tool manufacturer's instruction manual to access freeze frame data (MODE $02).

MODE $06

Refer to test value of troubleshooting and data of test limit indicated on the support data bit sequence table. A list of the support data is shown in the following table.

PID DIAGNOSTIC ITEM CHART

MODE $07

Refer to the data of DTC (pending code) for troubleshooting result about emission in the first time.

MODE $09

Refer to data of vehicle specification (V.I.N, calibration ID, diagnosis frequency etc.).

HOW TO USE THE SUBARU SELECT MONITOR

Note. For detailed operation procedures, refer to PC application help for Subaru Select Monitor.

READ CURRENT DATA FOR ENGINE (NORMAL MODE)

Note. For detailed operation procedures, refer to PC application help for Subaru Select Monitor. A list of the support data is shown in the following table.

SUPPORT DATA LIST

READ CURRENT DATA FOR ENGINE (OBD MODE)

Note. For detailed operation procedures, refer to PC application help for Subaru Select Monitor. A list of the support data is shown in the following table.

SUPPORT DATA LIST

READ FREEZE FRAME DATA FOR ENGINE (OBD MODE)

Note. For detailed operation procedures, refer to PC application help for Subaru Select Monitor. A list of the support data is shown in the following table.

FREEZE FRAME DATA REFERENCE CHART

V.I.N REGISTRATION

1. On «Main Menu» display, select {Each System Check}.
2. On «System Selection Menu» display, select {Engine Control System}.
3. Click the [OK] button after the information of engine type has been displayed.
4. On «Engine Diagnosis» display, select {Entry VIN}.
5. Perform the procedures shown on the display screen.

SUBARU SELECT MONITOR

Note. For detailed operation procedures, refer to PC application help for Subaru Select Monitor. For details concerning DTC, refer to "List of Diagnostic Trouble Code (DTC)". Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) .

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. Ref. to DRIVE CYCLE .

DTC REFERENCE CHART

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1. Check battery voltage is more than 12 V and fuel remains half [20 - 40 l (5.3 - 10.6 US gal, 4.4 - 8.8 Imp gal)].
2. Lift up the vehicle using a garage jack and place it on rigid racks, or drive the vehicle onto free rollers. WARNING: Before lifting up the vehicle, ensure parking brakes are applied. Do not use a pantograph jack in place of a rigid rack. Secure a rope or wire to the front or rear towing hooks to prevent the lateral runout of front wheels. Before rotating the wheels, make sure that there is no one in front of the vehicle. Besides while the wheels are rotating, make sure that no one approaches the vehicle front side. Make sure that there is nothing around the wheels. For AWD model, pay special attention to all four wheels. While servicing, do not depress or release the clutch pedal or accelerator pedal quickly regardless of the engine speed. Quick operation may cause the vehicle to drop off the free roller. To prevent the vehicle from slipping due to vibration, do not place anything between rigid rack and the vehicle.

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1. Check that no DTC remains after clearing memory. Ref. to «CLEAR MEMORY MODE»(ref-371914-S07670654082010091900000) .
2. Warm up the engine.
3. Prepare the Subaru Select Monitor kit. Ref. to «PREPARATION TOOL»(ref-371914-S11886956152010091900000) , General Description.
4. Prepare PC with Subaru Select Monitor installed.
5. Connect the USB cable to SDI (Subaru Diagnosis Interface) and USB port on the personal computer (dedicated port for the Subaru Select Monitor). NOTE: The dedicated port for the Subaru Select Monitor means the USB port which was used to install the Subaru Select Monitor.
6. Connect the diagnosis cable to SDI.
7. Install the delivery (test) mode fuse (A) of the fuse box.
8. Connect SDI to data link connector located in the lower portion of the instrument panel (on the driver's side). CAUTION: Do not connect any scan tools except Subaru Select Monitor or general scan tool.
9. Start the PC.
10. Turn the ignition switch to ON (engine OFF) and run the "PC application for Subaru Select Monitor".
11. On «Main Menu» display, select {Each System Check}.
12. On «System Selection Menu» display, select {Engine Control System}.
13. Click the [OK] button after the information of engine type has been displayed.
14. On «Engine Diagnosis» display, select {Dealer Check Mode Procedure}.
15. When the «Perform Inspection (Dealer Check) Mode?» is shown on the screen, click the [Next] button.
16. Perform subsequent procedures as instructed on the display screen. If trouble still remains in the memory, the corresponding DTC appears on the display screen. NOTE: For detailed operation procedures, refer to PC application help for Subaru Select Monitor. For details concerning DTC, refer to "List of Diagnostic Trouble Code (DTC)". Ref. to «LIST OF DIAGNOSTIC TROUBLE CODE (DTC)»(ref-371914-S32414380772010091900000) . Release the parking brake. The speed difference between front and rear wheels may illuminate the ABS warning light, but this does not indicate a malfunction. When engine control system diagnosis is finished, perform the VDC memory clearance procedure of self-diagnosis function. Ref. to «CLEAR MEMORY MODE»(ref-371926-S09999057382010091900000) .

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 cycle. After the repair for the DTC, perform a necessary drive cycle and make sure the function recovers and the DTC is recorded.

PREPARATION FOR DRIVE CYCLE

1. Check that the battery voltage is 12 V or more and fuel remains approx. half [20 - 40 l (5.3 - 10.6 US gal, 4.4 - 8.8 Imp gal)].
2. After performing the diagnostics and Clear Memory Mode, check that no DTC remains. EN(H4SO) (diag)-53, Clear Memory Mode.
3. Check the delivery (test) mode fuse is removed. NOTE: Perform the drive cycle after warming up the engine except when the engine coolant temperature at engine start is specified. Perform the drive cycle twice if the DTC in the list is marked with *. After completing the first drive cycle, stop the engine and perform second diagnosis in same condition.

DRIVE CYCLE A

DTC REFERENCE CHART

Diagnostic procedure

1. Drive for 20 minutes at a constant speed of 80 km/h (50 MPH).
2. Stop the vehicle and idle for one minute.

DRIVE CYCLE B

DTC REFERENCE CHART

Diagnostic procedure

1. Drive at 10 km/h (6 MPH) or more.
2. Stop the vehicle and idle for ten minutes.

DRIVE CYCLE C

DTC REFERENCE CHART

Diagnostic procedure

Drive according to the drive pattern described below.

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DRIVE CYCLE D

DTC REFERENCE CHART

Note. In drive cycle D, one drive cycle will be established when both the drift diagnosis and stuck diagnosis have completed.

Diagnostic procedure

DRIFT DIAGNOSIS

1. Make sure of the items below before starting the engine. Engine coolant temperature is less than 30°C (86°F). Remaining fuel is 10 l (2.6 US gal, 2.2 Imp gal) or more. Battery voltage is 10.9 V or more.
2. Idle the engine until engine coolant temperature is at least 10°C (18°F) higher than it was when engine started.
3. After the engine has reached the state of procedure 2), idle the engine for another 5 minutes or more.

STUCK DIAGNOSIS

1. Make sure that the battery voltage is 10.9 V or more.
2. Perform the Clear Memory Mode. Ref. to «CLEAR MEMORY MODE»(ref-371914-S07670654082010091900000) .
3. Drive the vehicle for the distance equal to the fuel of 50 l (13.2 US gal, 11 Imp gal). NOTE: It is acceptable to drive the vehicle intermittently. Do not disconnect the battery terminals during stuck diagnosis. (Data will be cleared by disconnecting the battery terminals.)

DRIVE CYCLE E

DTC REFERENCE CHART

Diagnostic procedure

1. Make sure that the battery voltage is 10.9 V or more.
2. Perform the Clear Memory Mode. Ref. to «CLEAR MEMORY MODE»(ref-371914-S07670654082010091900000) .
3. Drive the vehicle for the distance equal to the fuel of 30 l (7.9 US gal, 6.6 Imp gal). NOTE: It is acceptable to drive the vehicle intermittently. Do not disconnect the battery terminals while diagnosing. (Data will be cleared by disconnecting the battery terminals.)

DRIVE CYCLE F

DTC REFERENCE CHART

Diagnostic procedure

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1. Make sure that the engine coolant temperature is less than 30°C (86°F).
2. Drive according to the drive pattern described below. NOTE: There is no given transition time between idling and cruising. Driving at constant speed only on a downhill causes smaller engine load and may result in failure to obtain a right diagnostic result. When the engine stops while performing drive cycle F, perform it again from the state of procedure 1).

DRIVE CYCLE H

DTC REFERENCE CHART

Diagnostic procedure

1. Perform the Clear Memory Mode. Ref. to «CLEAR MEMORY MODE»(ref-371914-S07670654082010091900000) .
2. With the ignition switch ON (engine OFF), read the engine coolant temperature, intake air temperature and fuel temperature. Ref. to «READ CURRENT DATA FOR ENGINE (NORMAL MODE)»(ref-371914-S24953327312010091900000) , OPERATION, Subaru Select Monitor.
3. If the values from step 2 ) satisfy the following two conditions, idle the engine for one minute. Condition: | Engine coolant temperature - Intake air temperature | < or = 5°C (41 °F) | Engine coolant temperature - Fuel temperature | < or = 2°C (36°F) NOTE: If the conditions are not satisfied, turn the ignition switch to OFF and wait until the parameters are satisfied. For CVT models, hold the select lever to "P" range or "N" range at idling, and for MT models, the shift lever in the neutral position at idling.

Note. Initial diagnosis of electronic throttle control is performed after memory clearance. Wait for 10 seconds or more after turning the ignition switch to ON, and then start the engine. For detailed operation procedures, refer to PC application help for Subaru Select Monitor.

MALFUNCTION INDICATOR LIGHT PROCEDURE REFERENCE CHART

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1. When the ignition switch is turned to ON (engine OFF), the malfunction indicator light (A) in the combination meter illuminates. NOTE: If the malfunction indicator light does not illuminate, perform diagnostics of the malfunction indicator light circuit or the combination meter circuit. Ref. to «MALFUNCTION INDICATOR LIGHT DOES NOT COME ON»(ref-371914-S05928316672010091900000) , Malfunction Indicator Light.
2. After starting the engine, the malfunction indicator light goes out. If it does not go off, any of the engine and emission control system has malfunction.
3. If the diagnostic system detects a misfire which could damage the catalyst, the malfunction indicator light will blink at a cycle of 1 Hz.
4. Install the delivery (test) mode fuse (A) with ignition switch to OFF. When the ignition switch is turned to ON (engine OFF), the malfunction indicator light illuminates. After the engine starts, malfunction indicator light blinks in a cycle of 0.5 Hz. (During diagnosis) Malfunction indicator light blinks at a cycle of 3 Hz after diagnosis if there is no trouble. Malfunction indicator light illuminates if faulty.

ENGINE STARTING FAILURE PROCEDURE REFERENCE CHART

STARTER MOTOR CIRCUIT

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DIAGNOSTIC PROCEDURE

CHECK POWER SUPPLY AND GROUND LINE OF ENGINE CONTROL MODULE (ECM)

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DIAGNOSTIC PROCEDURE

IGNITION CONTROL SYSTEM

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DIAGNOSTIC PROCEDURE

FUEL PUMP CIRCUIT

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DIAGNOSTIC PROCEDURE

FUEL INJECTOR CIRCUIT

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DIAGNOSTIC PROCEDURE

LIST

DTC REFERENCE CHART