Mode 6 Data
2GR-FSE ENGINE CONTROL SYSTEM: SFI SYSTEM: CHECKING MONITOR STATUS
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, evaporative emission (EVAP) and thermostat.
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 instructions to view the monitor status. Although this instruction refers to 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
The monitor results and test values can be checked with the OBD II scan tool or the Techstream. The engine control module (ECM) monitors the emissions-related components such as the thermostat, catalyst converter and evaporative emissions (EVAP), and determines whether they are functioning normally or not. When monitoring is finished, the ECM stores the monitor results and the test values. The monitor result indicates whether the component is functioning normally or not. The test value is the value that was used to determine the monitor result. If the test value is outside of the test limit (malfunction criterion), the ECM determines the component is malfunctioning. Some emissions-related components have multiple test values to determine the monitor result. If one of these test values is outside of the test limit, the ECM determines that the component is malfunctioning.
(a) Connect the Techstream to the DLC3.
(b) Start the engine and turn the Techstream on.
(c) Clear the DTCs.
(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 power switch off.
NOTE: The test results will be lost if the power switch is turned off.
2. ACCESS MONITOR RESULT
(a) Enter the following menus: Powertrain / Engine and ECT / 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 (Minimum Limit) and maximum test limit (Maximum 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 will malfunction in the near future.
HINT: The monitor result may on rare occasions be Pass even if the Malfunction Indicator Lamp (MIL) is illuminated. This indicates that the system was malfunctioning in the 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.
A/F Sensor Bank 1 Sensor 1
HO2S Bank 1 Sensor 2
A/F Sensor Bank 2 Sensor 1
HO2S Bank 2 Sensor 2
Catalyst-Bank 1
Catalyst-Bank 2
EVAP
Misfire
