Mode 6 Data

2AZ-FE ENGINE CONTROL SYSTEM: 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 catalyst and evaporative emission (EVAP).

The monitor result allows the 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 will malfunction in the near future.

Perform the following procedure to view the monitor status. Although this procedure references the Lexus/Toyota 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 ignition switch to ON and the Techstream on.

(c) Clear DTCs Reading and Clearing Diagnostic Trouble Codes.

(d) 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 ignition switch off.

NOTICE:
The test results will be lost if the ignition switch is turned to OFF.

2. ACCESS MONITOR RESULT

(a) Enter the following menus: Powertrain / Engine and ECT / Monitor / Current 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 Details. The accuracy test value appears if the monitor status is either Pass or Fail.

HINT
The final judgment result is output. The result is not cleared when the ignition switch is turned off, but is cleared when the DTCs are cleared.

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 and maximum test limits, the component is functioning normally. If not, the component is malfunctioning. The test value is usually not near the test limits. If the test value is on the borderline of the test limits, the component is likely to malfunction in the near future.

HINT
The monitor result might on rare occasions be Pass 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 value by the scaling value listed below.

Advance/Retarded Intake Side





A/F Sensor (Sensor 1)





HO2 Sensor (Sensor 2)





Catalyst





Rear Oxygen Sensor Heater





EVAP





Misfire





HINT
*: EWMA (Exponential Weighted Moving Average) misfire counts for last 10 driving cycles (calculated) Calculation:

0.1 x (current counts) + 0.9 x (previous average) Initial value for (previous average) = 0