Engine Controls - Engine (Diagnostics) (H4SO): Other Subaru Forester SH

CHECK LIST NO. 1

Check the following item when problem has occurred.

Note. Use copies of this article for interviewing customers.

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CHECK LIST NO. 2

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

Note. Use copies of this article 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 the electrical test equipment on airbag system circuits. 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. Failure to do 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. Refer to «CLEAR MEMORY MODE»(ref-325319-S04489388682009071800000) .
5. Measure the voltage or resistance of individual sensor or all electrical control modules using 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. For detailed operation procedure, 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 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: The antenna must be kept as far apart as possible from control unit. (ECM is installed under the passenger's side floor mat). 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. Refer to «RELEASING OF FUEL PRESSURE»(ref-325305-S19314969582009071800000) , PROCEDURE, Fuel.
12. 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. After diagnosis of engine control system, perform the ABS memory clear procedure of self-diagnosis function.

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

Check if the engine ground terminal is properly connected to engine.

NOTE

1. The on-board diagnostic (OBD) system detects and indicates a fault in various inputs and outputs of the complex electronic throttle control. Malfunction indicator light in the combination meter indicates occurrence of a fault or trouble.
2. Further, against such a failure or 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. The freeze frame engine condition data are stored until DTCs are cleared. However, if any faults concerning fuel trim or misfiring are detected while the freeze frame engine condition data are stored, these data are rewritten to those concerning fuel trim or misfiring.
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 troubleshooting the vehicle which complies with OBD-II regulations, connect the Subaru Select Monitor or general scan tool to the vehicle.

PREPARATION TOOL

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

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1. Control module

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1. Sensor

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1. Solenoid valve, actuator, emission control system parts and ignition system parts

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ECM CONNECTOR TERMINALS REFERENCE CHART

WAVEFORM REFERENCE CHART Input/output name Measuring condition Waveform 1. Crankshaft position sensor At idling 2. Camshaft position sensor At idling

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This connector is used for Subaru Select Monitor.

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DATA LINK 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 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

1. MODE $01: Current powertrain diagnostic data
2. MODE $02: Powertrain freeze frame data
3. MODE $03: Emission-related powertrain DTC
4. MODE $04: Clear/Reset emission-related diagnostic information
5. MODE $06: Request on-board monitoring test results for intermittently monitored systems
6. MODE $07: Request on-board monitoring test results for continuously monitored systems
7. MODE $09: Request vehicle information

Read out the data according to repair procedures. (For detailed operation procedure, refer to the general scan tool instruction manual).

Note. For details concerning DTC, refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) .

MODE $02 (POWERTRAIN FREEZE FRAME DATA)

Refer to data denoting the operating condition when trouble is detected by on-board diagnosis system.

A list of the support data and PID (Parameter Identification) codes are shown in the following chart.

POWERTRAIN FREEZE FRAME 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 chart.

DIAGNOSTIC ITEM REFERENCE 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).

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1. Prepare the Subaru Select Monitor kit. Refer to «PREPARATION TOOL»(ref-325319-S06557699802009071800000) , General Description.
2. Prepare the personal computer which has been installed the Subaru Select Monitor.
3. Connect the USB cable between 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.
4. Connect the diagnosis cable to the SDI.
5. Connect the SDI to data link connector located in the lower portion of the instrument panel (on the driver's side). CAUTION: Do not connect the scan tools except for Subaru Select Monitor and general scan tool.
6. Start up the personal computer.
7. Turn the ignition switch to ON (engine OFF), and run the "PC application for Subaru Select Monitor".
8. Call up DTC and data, then record them.

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

READ CURRENT DATA FOR ENGINE (NORMAL MODE)

1. On the «Main Menu» display screen, select the {Each System Check}.
2. On the «System Selection Menu» display screen, select the {Engine Control System}.
3. Click the [OK] button after the information of engine type has been displayed.
4. On the «Engine Diagnosis» display screen, select the {Current Data Display & Save}.
5. On the «Current Data Display & Save» display screen, select the {Normal Sampling}.
6. Using the scroll key, scroll the display screen up or down until the desired data is shown.

1. A list of the support data is shown in the following table.

SCAN TOOL DATA REFERENCE CHART

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

READ CURRENT DATA FOR ENGINE (OBD MODE)

1. On the «Main Menu» display screen, select the {Each System Check}.
2. On the «System Selection Menu» display screen, select the {Engine Control System}.
3. Click the [OK] button after the information of engine type has been displayed.
4. On the «Engine Diagnosis» display screen, select the {OBD System}.
5. On the «OBD Menu» display screen, select the {Current Data Display & Save}.
6. On the «Current Data Display & Save» display screen, select the {All Data Display}.
7. Using the scroll key, scroll the display screen up or down until the desired data is shown.

1. A list of the support data is shown in the following table.

SCAN TOOL DATA REFERENCE CHART

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

READ FREEZE FRAME DATA FOR ENGINE (OBD MODE)

1. On the «Main Menu» display screen, select the {Each System Check}.
2. On the «System Selection Menu» display screen, select the {Engine Control System}.
3. Click the [OK] button after the information of engine type has been displayed.
4. On the «Engine Diagnosis» display screen, select the {OBD System}.
5. On the «OBD Menu» display screen, select the {Freeze Frame Data Display}.

1. A list of the support data is shown in the following table.

SCAN TOOL DATA REFERENCE CHART

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

V.I.N REGISTRATION

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

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

SUBARU SELECT MONITOR (NORMAL MODE)

1. On the «Main Menu» display screen, select the {Each System Check}.
2. On the «System Selection Menu» display screen, select the {Engine Control System}.
3. Click the [OK] button after the information of engine type has been displayed.
4. On the «Engine Diagnosis» display screen, select the {Diagnostic Code(s) Display}.
5. On the «Diagnostic Code(s) Display» screen, select the {Temporary Diagnostic Code(s)} or {Memorized Diagnostic Code(s)}.

Note. For detailed operation procedure, refer to the PC application help for Subaru Select Monitor. For details concerning DTC, refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) .

SUBARU SELECT MONITOR (OBD MODE)

1. On the «Main Menu» display screen, select the {Each System Check}.
2. On the «System Selection Menu» display screen, select the {Engine Control System}.
3. Click the [OK] button after the information of engine type has been displayed.
4. On the «Engine Diagnosis» display screen, select the {OBD System}.
5. On the «OBD Menu» display screen, select the {Diagnostic Code(s) Display}.
6. Make sure DTC is shown on the screen.

Note. For detailed operation procedure, refer to the PC application help for Subaru Select Monitor. For details concerning DTC, refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) .

PROCEDURE

Perform the diagnosis shown in the following DTC chart.

When performing the diagnosis not listed in "List of Diagnostic Trouble Code (DTC)", refer to the item on the drive cycle. Refer to DRIVE CYCLE .

DTC CHART

For the troubleshooting, there are driving patterns described below. Driving in the specified pattern allows to diagnose malfunctioning items listed below. After the repair of the following trouble items, be sure to drive the vehicle with the specified drive patterns to check whether the function is resumed correctly.

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 clearing the memory, check for any remaining unresolved trouble data. Refer to «CLEAR MEMORY MODE»(ref-325319-S04489388682009071800000) .
3. Disconnect the delivery (test) mode connector.

Note. Perform the diagnosis after warming up the engine except when the engine coolant temperature at starting is specified. Perform the diagnosis twice if the DTC marked with *. After completing the first diagnosis, stop the engine and perform second diagnosis in same condition.

DRIVE CYCLE A - DRIVE THE VEHICLE WITH 80 KM/H (50 MPH) FOR 20 MINUTES, AND THEN IDLE THE ENGINE FOR A MINUTE

DTC CONDITION CHART

DRIVE CYCLE B -10 MINUTES IDLING

Note. Drive the vehicle at 10 km/h (6 MPH) or faster before diagnosis.

DTC CONDITION CHART

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DTC CONDITION CHART

DRIVE CYCLE D

1. DRIFT DIAGNOSIS

1. Check that the engine coolant temperature at engine start is less than 30°C (86°F).
2. Make sure that fuel remains 10 l (2.6 US gal, 2.2 Imp gal) or more and the battery voltage is 10.9 V or more.
3. Start the engine, and check that the engine coolant temperature increases by 10°C (50°F) or more, and reaches 75°C (167°F) or more, when the engine is warmed up.
4. Idle the engine for 120 seconds or more in the condition of step 3.

1. STUCK DIAGNOSIS

1. Make sure that the battery voltage is 10.9 V or more.
2. Perform the Clear Memory Mode. Refer to «CLEAR MEMORY MODE»(ref-325319-S04489388682009071800000) .
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 while diagnosing. (Data will be cleared by disconnecting the battery terminals).

DTC CONDITION CHART

DRIVE CYCLE E

1. Make sure that the battery voltage is 10.9 V or more.
2. Perform the Clear Memory Mode. Refer to «CLEAR MEMORY MODE»(ref-325319-S04489388682009071800000) .
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).

DTC CONDITION CHART

DRIVE CYCLE F

1. Check that the engine coolant temperature at engine start is less than 30°C (86°F).
2. Start the engine, and warm it up until engine coolant temperature increases over 95°C (203°F).
3. After the engine has reached the state of procedure 2), idle the engine for 10 minutes or more.

Note. Do not disconnect the battery terminals while diagnosing. (Data will be cleared by disconnecting the battery terminals).

DTC CONDITION CHART

DRIVE CYCLE H

1. Perform the Clear Memory Mode. Refer to «CLEAR MEMORY MODE»(ref-325319-S04489388682009071800000) .
2. With the ignition switch ON, read the engine coolant temperature, intake air temperature and fuel temperature. Refer to «READ CURRENT DATA FOR ENGINE (NORMAL MODE)»(ref-325319-S03162793802009071800000) , OPERATION, Subaru Select Monitor.
3. If the values from step 2) satisfy the following two conditions, start the engine. 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. Start AT vehicles in the P range, and MT vehicles in the neutral position.
4. Idle the engine for 1 minute under the conditions in step 3 ).

DTC CONDITION CHART

1. On the «Main Menu» display screen, select the {Each System Check}.
2. On the «System Selection Menu» display screen, select the {Engine Control System}.
3. Click the [OK] button after the information of engine type has been displayed.
4. On the «Engine Diagnosis» display screen, select the {Clear Memory}.
5. When the "Clear Memory?" is shown on the screen, click the [Yes] button.
6. When "Done" and "Turn ignition switch to OFF" is shown on the display screen, turn the ignition switch to OFF.

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

1. On the «Main Menu» display screen, select the {Each System Check}.
2. On the «System Selection Menu» display screen, select the {Engine Control System}.
3. Click the [OK] button after the information of engine type has been displayed.
4. On the «Engine Diagnosis» display screen, select the {OBD System}.
5. On the «OBD Menu» display screen, select the {Clear Diagnostic Code?}.
6. When the "Clear Diagnostic Code?" is shown on the screen, click the [Yes] button.
7. When "Done" and "Turn ignition switch to OFF" is shown on the display screen, turn the ignition switch to OFF.

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

FUEL PUMP CONTROL (OFF DRIVE)

1. On the «System Operation Check Mode» display, select the {Fuel Pump Control}.
2. On the «Fuel Pump Control» display screen, select the {OFF Drive}.
3. On the «Start the Engine» display screen, start the engine and click the [OK] button.
4. Click the [Cancel] button to end the OFF drive. The screen will return to the «Fuel Pump Control» screen.

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

FUEL PUMP CONTROL (ON/OFF DRIVE)

1. On the «System Operation Check Mode» display, select the {Fuel Pump Control}.
2. On the «Fuel Pump Control» display screen, select the {ON/OFF Dr.}.
3. On the «Turn Ignition Switch ON with Engine Stalled» display screen, turn the ignition switch to ON and click the [OK] button.
4. Click the [Cancel] button to end the ON/OFF drive. The screen will return to the «Fuel Pump Control» screen.

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

IDLING IGNITION TIMING FIXED

1. On the «System Operation Check Mode» display screen, select the {Fixed Idle Ignition Timing}.
2. On the «Start the Engine» display screen, start the engine and click the [OK] button.
3. Click the [Cancel] button to end the idle ignition timing fixed. The screen will return to the «System Operation Check Mode» screen.

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

IDLE SPEED CONTROL

1. On the «System Operation Check Mode» display screen, select the {Idle Speed Control}.
2. On the «Start the Engine» display screen, start the engine and click the [OK] button.
3. In the «Idle Speed Control» screen, click the [↑] button or the [↓] button to change the setting values, then click the [OK] button. Setting is possible in a range between 500 RPM - 2,000 RPM, in increments of 50 RPM. However, the engine speed that can actually be controlled will vary depending on the vehicle.
4. Click the [Cancel] button to end the idle speed control. The screen will return to the «System Operation Check Mode» screen.

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

INJECTOR CONTROL (INJECTION STOP MODE)

1. On the «System Operation Check Mode» display, select the {Injector Control}.
2. On the «Injector Control» display screen, select the {Injection Stop Mode}.
3. Select the desired injector number on the «Injection Stop Mode» screen, and click the [OK] button.
4. On the «Start the Engine» display screen, start the engine and click the [OK] button.
5. Click the [Cancel] button to return the injection Stop Mode* display screen.
6. On the «Injection Stop Mode» display screen, click the [Return] button to end the «Injection Stop Mode». The screen will return to the «Injector Control» screen.

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

INJECTOR CONTROL (INJECTION QUANTITY CONTROL)

1. On the «System Operation Check Mode» display, select the {Injector Control}.
2. On the «Injector Control» display screen, select the {Injection Quantity Control}.
3. On the «Start the Engine» display screen, start the engine and click the [OK] button.
4. In the «Injection Quantity Control» screen, click the [↑] button or the [↓] button to change the setting values, then click the [OK] button. Setting is possible in a range between 0 - 20%, in increments of 1%.
5. Click the [Cancel] button to end the injection quantity control. The screen will return to the «Injector Control» screen.

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

EGR VALVE CONTROL

1. On the «System Operation Check Mode» display, select the {EGR Valve Control}.
2. On the «Start the Engine» display screen, start the engine and click the [OK] button.
3. In the «EGR Valve Control» screen, click the [↑] button or the [↓] button to change the setting values, then click the [OK] button. Setting is possible in 1 STEP increments. However, the number of STEPs that can actually be controlled will vary depending on the vehicle.
4. Click the [Cancel] button to end the EGR valve control. The screen will return to the «System Operation Check Mode» screen.

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

MALFUNCTION INDICATOR LIGHT PROCEDURE 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. Refer to «MALFUNCTION INDICATOR LIGHT DOES NOT COME ON»(ref-325319-S36445595102009071800000) , Malfunction Indicator Light.
2. After starting the engine, the malfunction indicator light goes out. If it does not go off, either the engine or emission control system has malfunction.
3. Turn the ignition switch to OFF and connect the delivery (test) mode connector.

1. When the ignition switch is turned to ON (engine OFF), the malfunction indicator light illuminates.
2. After the engine starts, malfunction indicator light blinks in a cycle of 0.5 Hz. (During diagnosis)
3. Malfunction indicator light blinks at a cycle of 3 Hz after diagnosis if there is no trouble. Malfunction indicator light illuminates if faulty.

Scheme 66

DIAGNOSTICS PROCEDURE FOR ENGINE STARTING FAILURE

STARTER MOTOR CIRCUIT

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DIAGNOSIS PROCEDURE CHART

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

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DIAGNOSIS PROCEDURE CHART

IGNITION CONTROL SYSTEM

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DIAGNOSIS PROCEDURE CHART

FUEL PUMP CIRCUIT

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DIAGNOSIS PROCEDURE CHART

FUEL INJECTOR CIRCUIT

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DIAGNOSIS PROCEDURE CHART

LIST

DIAGNOSTIC TROUBLE CODE (DTC) CHART