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Home >> Subaru >> 2012 >> Forester X, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls (Diagnostics) (H4DO) >> Drive Cycle >> Procedure >> Drive Cycle I
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Drive Cycle I

DTC CONDITION CHART

DTC Item Condition
*P0455 Evaporative Emission System Leak Detected (Large Leak) Engine coolant temperature: 5 - 450°C (41 - 113°F)
Intake air temperature: 5 - 50°C (41 - 122°F)
*P0456 Evaporative Emission Control System Leak Detected (Very Small Leak)
*P1451 Evaporative Emission Cont. Sys.
*P2402 Evaporative Emission System Leak Detection Pump Control Circuit High
*P2404 Evaporative Emission System Leak Detection Pump Sense Circuit Range/Performance
*P2420 Evaporative Emission System Switching Valve Control Circuit High
CAUTION: Be careful of the state of the battery when performing the DRIVE CYCLE I consecutively. Performing the DRIVE CYCLE I consecutively without the engine running may cause a low battery voltage and battery discharge.
NOTE:
  • If it is necessary to perform DRIVE CYCLE I consecutively, drive the vehicle under the following conditions to release accumulated evaporating gas. Performing the DRIVE CYCLE I consecutively without starting the engine causes a large amount of evaporating gas to accumulate in the canister, which hinders an accurate diagnosis.
    • After engine is warmed up
    • Drive for 10 minutes or more at a speed of 48 km/h (30 MPH) or more (duration of drive can be an accumulation)
  • To obtain an accurate diagnostic result, perform the procedures according to the following points.
    • Do not refuel gas immediately before performing DRIVE CYCLE I. There will be a large amount of evaporating gas immediately after refuel, which may cause a less accurate diagnostic performance.
    • Do not shake the vehicle while performing DRIVE CYCLE I. Shaking the vehicle causes evaporating gas to increase inside the fuel tank, which may cause a less accurate diagnostic performance.
    • Do not perform any service operation including installation or removal of parts or connectors while performing DRIVE CYCLE I. Performing service operation could affect on the functions of related parts, which may cause a less accurate diagnostic performance.
  1. Prepare the Subaru Select Monitor kit. < refer to PREPARATION TOOL , General Description >
    Fig 1: Identifying Subaru Select Monitor Kit
    G07670223Courtesy of SUBARU OF AMERICA, INC.
  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.
    Fig 2: Locating Data Link Connector
    G07670224Courtesy of SUBARU OF AMERICA, INC.
  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 {OBD System}.
  12. On << OBD Menu >> display, select {Evaporative System Leak Test}.
  13. On << Evaporative System Leak Test >> display, select {Evaporative System Leak Test}.
  14. On << Evaporative System Leak Test is running. Press Cancel to exit this function. >> display, click the [OK] button to perform evaporative system leak test.
  15. When << Conditions have been enabled to control this function. Turn the ignition switch off to terminate the test. >> display appears, wait for 30 minutes without clicking the [OK] button.
    CAUTION: Do not leave the vehicle for an extended period of time after the test is complete. This may cause early deterioration of the battery or discharged battery.
    NOTE:
    • Clicking the [OK] button bring the << Evaporative System Leak Test >> display back, although the test is continuing.
    • The Subaru Select Monitor screen does not change after the evaporative system leak test is complete or when the test is aborted by turning off the ignition switch.
    • If << Test conditions are not correct >> display appears, check that the engine coolant temperature and intake air temperature are within the specified range using Subaru Select Monitor. If the conditions are satisfied, make the necessary preparation for the drive cycle again. < refer to PREPARATION FOR DRIVE CYCLE , PROCEDURE, Drive Cycle >
  16. After 30 minutes passed from the start of step  14), click the [OK] button to return to the << Evaporative System Leak Test >> display.
  17. Click buttons until the << OBD Menu >> display appears, then select {Result of on-board monitor test}.
  18. In the {Result of on-board monitor test}, check TID $C1 - $CA of MID $3C.

    Result of on-board monitor test 

    ON-BOARD MONITOR TEST RESULT CHART

    Display Details Remarks
    $0000 is stored in all Val. During the evaporative system leak test, the test conditions were not met and the test was cancelled. Once the test conditions are met, perform the test again.
    All Val. are stored with values and OK is set to all the results. Evaporative system leak test is completed correctly. While the ignition switch is ON, read temporary codes using the Subaru Select Monitor.
    Some results were no good. The evaporative system leak test completed successfully but the results were faulty. While the ignition switch is ON, read temporary codes using the Subaru Select Monitor.
  19. When the evaporative system leak test is completed correctly, read the temporary codes with the ignition switch turned to ON position. If the DTC is recorded, check the appropriate DTC. < refer to OPERATION , Read Diagnostic Trouble Code (DTC) >
NOTE: The temporary code will be cleared by turning ignition switch to OFF.
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