From 08/2009

2GR-FE ENGINE CONTROL: SFI SYSTEM: CHECKING MONITOR STATUS

The purpose of the monitor result (mode 06) is to allow access to the results for on-board diagnostic monitoring tests of specific components/systems that are not continuously monitored. Examples are the catalyst, evaporative emission (EVAP) and thermostat.

The monitor result allows an OBD II scan tool to display the monitor status, test value, minimum test limit and maximum test limit. These data are displayed after the vehicle has been driven to run the monitor.

When the test value is not between the minimum test limit and maximum test limit, the ECM (PCM) interprets this as a malfunction. When the component is not malfunctioning, if the difference of the test value and test limit is very small, the component may malfunction in the near future.

Perform the following instruction to view the monitor status. Although this instruction references the Lexus diagnostic tester, it can be checked using a generic OBD II scan tool. Refer to your scan tool operator's manual for specific procedures.

1. PERFORM MONITOR DRIVE PATTERN

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Clear the DTCs DTC Check / Clear.

(e) Run the vehicle in accordance with the applicable drive pattern described in Readiness Monitor Drive Pattern Monitors, Trips, Drive Cycles and Readiness Codes. Do not turn the engine switch off.

NOTICE:
The test results will be lost if the engine switch is turned off.

2. ACCESS MONITOR RESULT

(a) Enter the following menus: Powertrain / Engine / Monitor / Result. The monitor status appears after the component name.

* Pass: The component is functioning normally.

* Fail: The component is malfunctioning.

(b) Confirm that the component is either Pass or Fail.

(c) Select the component and press ENTER. The accuracy test value appears if the monitor status is either Pass or Fail.

3. CHECK COMPONENT STATUS

(a) Compare the test value with the minimum test limit (MIN LIMIT) and maximum test limit (MAX LIMIT).

(b) If the test value is between the minimum test limit and maximum test limit, the component is functioning normally. If not, the component is malfunctioning. The test value is usually significantly higher or lower than the test limit. If the test value is on the borderline of the test limit, the component may malfunction in near future.

HINT
The monitor result might show a pass on rare occasions even if the Malfunction Indicator Lamp (MIL) is illuminated. This indicates the system malfunctioned on a previous driving cycle. This might be caused by an intermittent problem.

4. MONITOR RESULT INFORMATION

If you use a generic scan tool, multiply the test value by the scaling value listed below.

Advance / Retarded Intake Side:

Bank 1