Emissions - Readiness Code Set Procedure

NUMBER: 11-98-10R
DATE: 03/03/11

APPLICABILITY:
2005MY and Newer Vehicles

SUBJECT:
Readiness Code Set Procedure;
On-Board Diagnostic System I/M Check
During State Emission Test

STATE I/M PROGRAM ADVISORY BULLETIN

This bulletin provides additional information to Subaru State I/M Program Advisory Bulletin # 11-72-04.

About 30 states have implemented regulations for inspecting the vehicle's On-Board Diagnostic (OBD) system as part of their state emissions inspection program EPA guidance recommends no more than one unset readiness code monitor for 2001 and newer model vehicles. A state emission inspection may not pass a vehicle if the number of OBD system readiness monitors "Not Ready" or "Incomplete" is greater than stated above. Under this condition, the vehicle operator should be instructed to drive his/her vehicle for a few days to set the monitors before returning for an emission test re-inspection

Below is the recommended readiness code set procedure for 2005MY and newer (to 2010MY) Subaru vehicles (excluding the 2011MY Forester 2.5L non-turbo vehicles):

1) Ensure the fuel level in the fuel tank is between 1/4 and 3/4 level. The recommended fuel level for this procedure is 1/2 fuel tank level.

2) Start the engine from cold condition and idle for more than 20 seconds (2011MY Impreza Turbo (STI & WRX) and Forester Turbo only) and drive the vehicle for more than 15 minutes at a speed greater than 50 mph in order to ensure proper warm-up of the engine Avoid sudden acceleration, hard braking, and sudden lane change during the warm up.

3) The vehicle should be driven at a steady-state speed of 55 mph with minimal throttle angle change for more than 3 minutes.

4) Verify the condition of readiness codes using a generic scan tool (GST).

Owners of rejected or failing vehicles may be instructed by the State I/M Program to contact their Subaru Dealer (and/or independent service provider) for service.

The generic scan tool (GST) used for OBD I/M Check inspection varies by State I/M Program. The proper scan tool communication protocols for all 2011MY model year Subaru vehicle is "ISO 15765-4".

Below is the recommended readiness code set procedure for the 2011 MY N/A Forester, and newer:

Ensure the fuel level in the fuel tank is between the 1/4 and 3/4 level The recommended fuel level for this procedure is 1/2 of the fuel tank level

Note: The 2011MY Forester 25L non-turbo vehicle sets the evaporative readiness to "complete" in a three step process:

1) Drive the vehicle (following Drive Cycle 1, below) for more than 10 minutes

2) Park the car for 5-1/2 hours in an area or facility with an ambient temperature more than 39 degrees Fahrenheit

3) The vehicle should be driven at a steady-state of speed of 55mph, with minimal throttle angle change for more than 3 minutes

The Automatic or Forced test for the Evaporative Leak Control module (ELCM) must be completed with no DTCs before the Evaporative Readiness monitor driving pattern can be attempted. Please consult the 2011MY Subaru Forester Service Manual for ELCM service diagnostics, which is available online at the website.

DRIVE CYCLE 1

CAUTION:
Be careful of the state of the battery when performing the DRIVE CYCLE 1 consecutively. Performing the DRIVE CYCLE 1 consecutively without the engine running may cause a low battery voltage and battery discharge.

NOTE:

If it is necessary to perform DRIVE CYCLE 1 consecutively, drive the vehicle under the following conditions to release accumulated evaporating gas. Performing the DRIVE CYCLE 1 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 1. 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 1. 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 1. 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

2) Prepare PC with Subaru Select Monitor installed

3) Connect the USE cable to SDI (Subaru Diagnosis Interface) and USE port on the personal computer (dedicated port for the Subaru Select Monitor)

NOTE:
The dedicated port for the Subaru Select Monitor means the USE 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 <

> display, select {Each System Check}.

9) On <> display, select {Engine Control System}

10) Click the [OK] button after the information of engine type has been displayed.

11) On <> display, select {OBD System}.

12) On <> display, select {Evaporative System Leak Test}.

13) On <> display, select {Evaporative System Leak Test}.

14) On <> display, click the [OK] button to perform evaporative system leak test.

15) When <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 <> 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 <> 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.

16) After 30 minutes passed from the start of step 14), click the [OK] button to return to the <> display.

17) Click buttons until the <> 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 OF BOARD MONITOR TEST

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

NOTE:
The temporary code will be cleared by turning ignition switch to OFF.

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