Checking Monitor Status
CHECKING MONITOR STATUS1. Monitor Result Description
The Monitor Result is part of the monitoring for malfunctions in emission related components such as the thermostat, catalytic converter, and evaporative emission system. The various states (Test Items) of the components are monitored by the ECM. The Test Item values (Test Values) can be read using a hand-held tester or OBD II scan tool.
A Test Value is the latest data snapshot after the vehicle is driven to run the monitor. Therefore, the Test Value is not dynamic data.
If a Test Value is outside the Test Limit, this indicates that the Test Item is malfunctioning. If a Test Value is on the borderline of the Test Limit, any malfunctions may be concealed in the Test Item.
Test values are cleared when the ignition switch is turned to OFF.
Example
- Test ID: Code applied to each Test Item
- Test Item: Component to be monitored in the test
- Test Value: Value to be monitored
- Unit Conversion: Conversion factor used to calculate the Test Value displayed on hand-held tester
- Unit: Unit applied to Test Value
- Test Limit: The malfunction threshold of Test Item
HINT:
- Specifics of each Test Item, Test Value, Unit Conversion and Test Limit are described in the paragraph titled "MONITOR RESULT" in each DTC section relating to the emission related components.
- The Monitor Result is not applicable to the Heated Oxygen (HO2) sensor. For more information about the test, refer to O2S Test Result.
2. Test Procedure
CAUTION: Strictly observe posted speed limits, traffic laws, and road conditions when conducting the drive patterns.
a. Connect a hand-held tester or OBD II scan tool to the DLC3.
b. Turn the ignition switch to ON.
c. Turn the tester or scan tool ON.
d. Clear DTCs (where set).
e. Drive the vehicle to run the monitor, in accordance with the applicable Drive Pattern described in the Readiness Monitor Drive Pattern section.
f. After conducting the drive pattern, select the following menu items on the tester: DIAGNOSIS / ENHANCED OBD II / MONITOR INFO / MONITOR RESULT.
g. The Test Items appear at the beginning of each line followed by INCMP, PASS or FAIL.
1. INCMP: Stands for incomplete. The judgment process has not yet been finished.
2. PASS: No malfunction has been detected.
3. FAIL: A malfunction has been detected.
h. Select the Test Item (Label) from the list and press the ENTER button. You will see the following screen:
1. VAL: Test Value
2. LMT: Test Limit
3. TLT: Test Limit Type (Either 0 or 1 is displayed)
HINT:
- Pass result:
TLT = 0 indicates that VAL smaller than LMT, and TLT = 1 indicates that VAL larger than LMT.
- Fail result:
TLT = 0 indicates that VAL larger than LMT, and TLT = 1 indicates that VAL smaller than LMT.
- The Test Value (VAL) is recorded after the monitor is completed.
- When the Test Value is on the borderline of the Test Limit, the Test Item may have a problem or malfunction.
i. For the scan tool, refer to the instruction manual.
j. If necessary, press the HELP to see the information of the TLT.
NOTE: In rare cases, the test may be passed even with a DTC set and the MIL illuminated. The monitor might have detected a malfunction on a previous trip, however the malfunction was not detected on the most recent trip. This indicates that an intermittent problem may be cause of the DTC.