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 instruction to view the monitor status. Although this instruction 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.
- PERFORM MONITOR DRIVE PATTERN
- Connect Techstream to the DLC3.
- Turn the power switch ON (IG) and turn Techstream ON.
- Clear the DTCs (see DTC CHECK / CLEAR ).
- Run the vehicle in accordance with the applicable drive pattern described in READINESS MONITOR DRIVE PATTERN (see READINESS MONITOR DRIVE PATTERN
). DO NOT turn the power switch OFF.NOTE: The test results will be lost if the power switch is turned OFF.
- ACCESS MONITOR RESULT
- Select from Techstream 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.
- Confirm that the component is either Pass or Fail.
- Select the component and press ENTER. The accuracy test value appears if the monitor status is either Pass or Fail.
- Select from Techstream menus: Powertrain / Engine and ECT / Monitor / Result. The monitor status appears after the component name.
- CHECK COMPONENT STATUS
- Compare the test value with the minimum test limit (MIN LIMIT) and maximum test limit (MAX LIMIT).
- 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 limits, the component will malfunction in 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.
- MONITOR RESULT INFORMATION
If you use a generic scan tool, multiply the test value by the scaling value listed below.
A/F Sensor Bank Sensor 1
| Monitor ID | Test ID | Scaling | Unit | Description |
|---|---|---|---|---|
| $01 | $8E | Multiply by 0.0003 | No dimension | A/F sensor deterioration level |
HO2S Bank Sensor 2
| Monitor ID | Test ID | Scaling | Unit | Description |
|---|---|---|---|---|
| $02 | $07 | Multiply by 0.001 | V | Minimum sensor voltage |
| $02 | $08 | Multiply by 0.001 | V | Maximum sensor voltage |
| $02 | $8F | Multiply by 0.0003 | g | Maximum oxygen storage capacity |
Catalyst - Bank 1
| Monitor ID | Test ID | Scaling | Unit | Description |
|---|---|---|---|---|
| $21 | $A9 | Multiply by 0.0003 | No dimension | Oxygen storage capacity of catalyst bank 1 |
EVAP
| Monitor ID | Test ID | Scaling | Unit | Description |
|---|---|---|---|---|
| $3D | $C9 | Multiply by 0.001 | kPa | Test value for small leak (P0456) |
| $3D | $CA | Multiply by 0.001 | kPa | Test value for gross leak (P0455) |
| $3D | $CB | Multiply by 0.001 | kPa | Test value for leak detection pump OFF stuck (P2401) |
| $3D | $CD | Multiply by 0.001 | kPa | Test value for leak detection pump ON stuck (P2402) |
| $3D | $CE | Multiply by 0.001 | kPa | Test value for vent valve OFF stuck (P2420) |
| $3D | $CF | Multiply by 0.001 | kPa | Test value for vent valve ON stuck (P2419) |
| $3D | $D0 | Multiply by 0.001 | kPa | Test value for reference orifice low flow (P043E) |
| $3D | $D1 | Multiply by 0.001 | kPa | Test value for reference orifice high flow (P043F) |
| $3D | $D4 | Multiply by 0.001 | kPa | Test value for purge VSV close stuck (P0441) |
| $3D | $D5 | Multiply by 0.001 | kPa | Test value for purge VSV open stuck (P0441) |
| $3D | $D7 | Multiply by 0.001 | kPa | Test value for purge flow insufficient (P0441) |
Misfire
| Monitor ID | Test ID | Scaling | Unit | Description |
|---|---|---|---|---|
| $A1 | $0B | Multiply by 1 | Time | Exponential Weighted Moving Average (EWMA) misfire for all cylinders: Misfire counts for last ten driving cycles - Total |
| $A1 | $0C | Multiply by 1 | Time | Misfire rate for all cylinders: Misfire counts for last/current driving cycle - Total |
| $A2 | $0B | Multiply by 1 | Time | EWMA misfire for cylinder 1: Misfire counts for last ten driving cycles - Total |
| $A2 | $0C | Multiply by 1 | Time | Misfire rate for cylinder 1: Misfire counts for last/ current driving cycle - Total |
| $A2 | $0C | Multiply by 1 | Time | Misfire rate for cylinder 1: Misfire counts for last/ current driving cycle - Total |
| $A3 | $0C | Multiply by 1 | Time | Misfire rate for cylinder 2: Misfire counts for last/ current driving cycle - Total |
| $A4 | $0B | Multiply by 1 | Time | EWMA misfire for cylinder 3: Misfire counts for last ten driving cycles - Total |
| $A4 | $0C | Multiply by 1 | Time | Misfire rate for cylinder 3: Misfire counts for last/ current driving cycle - Total |
| $A5 | $0B | Multiply by 1 | Time | EWMA misfire for cylinder 4: Misfire counts for last ten driving cycles - Total |
| $A5 | $0C | Multiply by 1 | Time | Misfire rate for cylinder 4: Misfire counts for last/ current driving cycle - Total |