Home ReviewsRefund
Home/Subaru/Impreza/Subaru Impreza GH (2007-2011)/Repair manual/Testing & Diagnostics/Engine Controls - Engine (Diagnostics) (H4SO) (Except Sti):…
Contents Wiring diagrams Section: Testing & Diagnostics All sections

Engine Controls - Engine (Diagnostics) (H4SO) (Except Sti): Overview Subaru Impreza GH

Testing & Diagnostics ~583 words
StepCheckYesNo
1 CHECK ENGINE START FAILURE. Ask the customer when and how the trouble occurred using the interview check list. Refer to CHECK , Check List for Interview. Start the engine.Is Does the engine start?Go to step 2.Inspection using "Diagnostics for Engine Start Failure". Refer to DIAGNOSTICS FOR ENGINE STARTING FAILURE .
2 CHECK ILLUMINATION OF MALFUNCTION INDICATOR LIGHT.Does the malfunction indicator light illuminate?Go to step 3.Inspection using "General Diagnostic Table". Refer to INSPECTION , General Diagnostic Table.
3 CHECK COMMUNICATION STATUS. Turn the ignition switch to OFF. Connect the Subaru Select Monitor or general scan tool to the data link connector. Turn the ignition switch to ON, and run the Subaru Select Monitor or general scan tool. NOTE: Subaru Select Monitor For detailed procedures, see "Subaru Select Monitor". Refer to SUBARU SELECT MONITOR . General scan tool For detailed operation procedures, see the general scan tool operation information.Does Subaru select monitor or general scan tool communicate with vehicle normally?Go to step 4.Inspection using "Diagnostics Procedure for Subaru Select Monitor Communication". Refer to DIAGNOSTIC PROCEDURE FOR SUBARU SELECT MONITOR COMMUNICATION .
4 CHECK DTC. Read DTC using Subaru Select Monitor or general scan tool. NOTE: Subaru Select Monitor See "Read Diagnostic Trouble Code" for detailed operation procedure. Refer to READ DIAGNOSTIC TROUBLE CODE (DTC) . General scan tool For detailed operation procedures, see the general scan tool operation information.Is DTC displayed on the Subaru Select Monitor or general scan tool?Record the DTC. Repair the trouble cause. Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . Go to step 5.Repair the related parts. NOTE: If DTC is not shown on display although the malfunction indicator light illuminates, perform the diagnosis of malfunction indicator light circuit or combination meter. Refer to MALFUNCTION INDICATOR LIGHT .
5 PERFORM DIAGNOSIS. Perform the Clear Memory Mode. Refer to CLEAR MEMORY MODE . Perform the Inspection Mode. Refer to INSPECTION MODE .Is DTC displayed on the Subaru Select Monitor or general scan tool?Inspect using "Diagnostic Procedure with Diagnostic Trouble Code (DTC)". Refer to DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) .Finish the diagnosis.
NOTE
Subaru Select Monitor For detailed procedures, see "Subaru Select Monitor". Refer to SUBARU SELECT MONITOR . General scan tool For detailed operation procedures, see the general scan tool operation information.
NOTE
Subaru Select Monitor See "Read Diagnostic Trouble Code" for detailed operation procedure. Refer to READ DIAGNOSTIC TROUBLE CODE (DTC) . General scan tool For detailed operation procedures, see the general scan tool operation information.
NOTE
If DTC is not shown on display although the malfunction indicator light illuminates, perform the diagnosis of malfunction indicator light circuit or combination meter. Refer to MALFUNCTION INDICATOR LIGHT .

DIAGNOSTIC PROCEDURE CHART

OPERATION

Note. When Clear Memory Mode is performed in OBD mode of Subaru Select Monitor, only DTCs are cleared.

  1. Prepare the Subaru Select Monitor kit. Refer to «PREPARATION TOOL»(ref-357251-S21952535832010031100000) , General Description.
  2. Prepare PC with Subaru Select Monitor installed.
  3. 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.
  4. Connect the diagnosis cable to SDI.
  5. Connect the delivery (test) mode connector (A) located under the glove box.
  6. Connect 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.
  7. Start the PC.
  8. Turn the ignition switch to ON (engine OFF) and run the "PC application for Subaru Select Monitor".
  9. On «Main Menu» display, select {Each System Check}.
  10. On «System Selection Menu» display, select {Engine Control System}.
  11. Click the [OK] button after the information of engine type has been displayed.
  12. On «Engine Diagnosis» display, select {System Operation Check Mode}.
  13. On «System Operation Check Mode» display, select {Actuator ON/OFF Operation}.
  14. Select the desired compulsory actuator on the «Actuator ON/OFF Operation» display screen and click the [Next] button.
  15. Clicking the [Exit] button completes the compulsory valve operation check mode. The display will then return to the «Actuator ON/OFF Operation» screen. A list of the support data is shown in the following table. DISPLAY DESCRIPTION Description Display Compulsory fuel pump relay operation check Fuel Pump Relay Compulsory purge control solenoid valve operation check CPC Solenoid Valve Compulsory radiator fan relay operation check Radiator Fan Relay Compulsory air conditioning relay operation check A/C Compressor Relay Compulsory pressure control solenoid valve operation check PCV Solenoid Valve Compulsory drain valve operation check Vent. Solenoid Valve NOTE: The following parts will be displayed but not functional. DISPLAY DESCRIPTION Display EGR Solenoid Valve ASV Solenoid Valve FICD Solenoid Pressure Switching Sol.1 Pressure Switching Sol.2 AAI Solenoid Valve Tank Sensor Cntl Valve Turbocharger Wastegate Solenoid EXH. Bypass Control Permit Flag Secondary Air Combi Valve 2 For detailed operation procedures, see "PC application help for Subaru Select Monitor".
  1. Prepare the Subaru Select Monitor kit. Refer to «PREPARATION TOOL»(ref-357251-S21952535832010031100000) , General Description.
  2. Prepare PC with Subaru Select Monitor installed.
  3. 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.
  4. Connect the diagnosis cable to SDI.
  5. Connect 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 the PC.
  7. Turn the ignition switch to ON (engine OFF) and run the "PC application for Subaru Select Monitor".
  8. On «Main Menu» display, select {Each System Check}.
  9. On «System Selection Menu» display, select {Engine Control System}.
  10. Click the [OK] button after the information of engine type has been displayed.
  11. On «Engine Diagnosis» display, select {System Operation Check Mode}.
  12. The following items are displayed on the monitor. DISPLAY DESCRIPTION Display Actuator ON/OFF Operation Immobilizer System Fuel Pump Control Fixed Idle Ignition Timing Idle Speed Control Injector Control EGR Valve Control

More articles — Engine Controls - Engine (Diagnostics) (H4SO) (Except Sti)