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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 Techstream to display the monitor status, test value, minimum test value 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 these instructions refer 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 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON and the Techstream on.
    3. Clear DTCs. Refer to DTC CHECK / CLEAR .
    4. Run the vehicle in accordance with the applicable drive pattern described in READINESS MONITOR DRIVE PATTERN. Refer to READINESS MONITOR DRIVE PATTERN . Do not turn the ignition switch off.
      NOTE:

      The test results will be lost if the ignition switch is turned off.

  2. ACCESS MONITOR RESULT 
    1. Enter the following menus: Powertrain / Engine and ECT / Monitor / Current Monitor / Result.
    2. Confirm the monitor status for each component.

      HINT: 

      The monitor status for each component is displayed in the Result column.

      • Pass: The component is functioning normally.
      • Fail: The component is malfunctioning.
    3. Display the test results for a monitor by selecting the icon in the Details column for that monitor.
    4. Display the test value for an item listed under Test Results by selecting the icon in the Details column for that item.
  3. CHECK COMPONENT STATUS 
    1. Compare the test value with the minimum test limit (MIN) and maximum test limit (MAX).
    2. 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 limits. If the test value is on the borderline of the test limits, the component will 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 test value by the scaling value listed below.

    Advance/Retarded Intake Side

    Monitor ID Test ID Scaling Unit Description
    $35 $81 Multiply by 0.01 Second Forced movement of oil control valve time

    Air Fuel Ratio Sensor

    Monitor ID Test ID Scaling Unit Description
    $01 $8A Multiply by 0.00012 V Rich to Lean response rate deterioration level
    $01 $8A Multiply by 0.00012 V Lean to Rich response rate deterioration level
    $01 $90 Multiply by 0.001 Seconds Rich to Lean delay level
    $01 $90 Multiply by 0.001 Seconds Lean to Rich delay level
    $01 $91 Multiply by 0.004 mA A/F sensor current

    Heated Oxygen Sensor

    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 $8B Multiply by 0.001 Second 0.35 to 0.2 V sensor switch time
    $02 $8D Multiply by 0.001 Second Duration that sensor voltage drops to 0.2 V during fuel-cut
    $02 $8F Multiply by 0.0003 g Maximum oxygen storage capacity

    Rear Oxygen Sensor Heater

    Monitor ID Test ID Scaling Unit Description
    $42 $91 Multiply by 0.001 Ohm Oxygen sensor heater resistance for bank 1 sensor 2

    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
    REAR OXYGEN SENSOR HEATER

    Monitor ID Test ID Scaling Unit Description
    $42 $91 Multiply by 0.001 Ohm Oxygen sensor heater resistance for bank 1 sensor 2
    $46 $91 Multiply by 0.001 Ohm Oxygen sensor heater resistance for bank 2 sensor 2

    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 $D4 Multiply by 0.001 kPa Test value for purge VSV stuck closed (P0441)
    $3D $D5 Multiply by 0.001 kPa Test value for purge VSV stuck open (P0441)
    $3D $D7 Multiply by 0.001 kPa Test value for purge flow insufficient (P0441)

    Secondary Air Injection (AIR) Bank 1

    Monitor ID Test ID Scaling Unit Description
    $71 $E1 Multiply by 0.01 gm/sec Test value of AIR insufficient
    $71 $E2 Multiply by 0.01 kPa Test value of AIR pump ON stuck
    $71 $E3 Multiply by 0.01 kPa Test value of AIR pump OFF stuck
    $71 $E4 Multiply by 0.01 kPa Test value of AIR control valve ON stuck
    $71 $E5 Multiply by 0.01 kPa Test value of AIR control valve OFF stuck

    Misfire

    Monitor ID Test ID Scaling Unit Description
    $A1 $0B Multiply by 1 Time Total EWMA* misfire count of cylinder 1 in last ten driving cycles
    $A1 $0C Multiply by 1 Time
    • When ignition switch is ON, total misfire count of all cylinders in last driving cycle is displayed.
    • While engine is running, total misfire count of all cylinders in current driving cycle is displayed.
    $A2 $0B Multiply by 1 Time Total EWMA* misfire count of cylinder 1 in last ten driving cycles
    $A2 $0C Multiply by 1 Time
    • When ignition switch is ON, total misfire count of cylinder 1 in last driving cycle is displayed.
    • While engine is running, total misfire count of cylinder 1 in current driving cycle is displayed.
    $A3 $0B Multiply by 1 Time Total EWMA* misfire count of cylinder 1 in last ten driving cycles
    $A3 $0C Multiply by 1 Time
    • When ignition switch is ON, total misfire count of cylinder 2 in last driving cycle is displayed.
    • While engine is running, total misfire count of cylinder 2 in current driving cycle is displayed.
    $A4 $0B Multiply by 1 Time Total EWMA* misfire count of cylinder 1 in last ten driving cycles
    $A4 $0C Multiply by 1 Time
    • When ignition switch is ON, total misfire count of cylinder 3 in last driving cycle is displayed.
    • While engine is running, total misfire count of cylinder 3 in current driving cycle is displayed.
    $A5 $0B Multiply by 1 Time Total EWMA* misfire count of cylinder 1 in last ten driving cycles
    $A5 $0C Multiply by 1 Time
    • When ignition switch is ON, total misfire count of cylinder 4 in last driving cycle is displayed.
    • While engine is running, total misfire count of cylinder 4 in current driving cycle is displayed.

    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

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