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.

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.
1. Connect the Techstream to the DLC3.
2. Start the engine and turn the Techstream on.
3. Clear the DTCs.
4. 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
1. 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.
2. Confirm that the component is either Pass or Fail.
3. Select the component and press ENTER. The accuracy test value appears if the monitor status is either Pass or Fail.
CHECK COMPONENT STATUS
1. Compare the test value with the minimum test limit (Minimum Limit) and maximum test limit (Maximum Limit).
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 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.

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

MONITOR RESULT INFORMATION

Monitor ID	Test ID	Scaling	Unit	Description
$01	$8E	Multiply by 0.001	V	A/F sensor deterioration level
$01	$91	Multiply by 0.004	mA	A/F sensor current

HO2S Bank 1 Sensor 2

MONITOR RESULT INFORMATION (HO2S BANK 1 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

A/F Sensor Bank 2 Sensor 1

MONITOR RESULT INFORMATION (A/F SENSOR BANK 2 SENSOR 1)

Monitor ID	Test ID	Scaling	Unit	Description
$05	$8E	Multiply by 0.001	V	A/F sensor deterioration level
$05	$91	Multiply by 0.004	mA	A/F sensor current

HO2S Bank 2 Sensor 2

MONITOR RESULT INFORMATION (HO2S BANK 2 SENSOR 2)

Monitor ID	Test ID	Scaling	Unit	Description
$06	$07	Multiply by 0.001	V	Minimum sensor voltage
$06	$08	Multiply by 0.001	V	Maximum sensor voltage
$06	$8F	Multiply by 0.0003	g	Maximum oxygen storage capacity

Catalyst-Bank 1

MONITOR RESULT INFORMATION (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

Catalyst-Bank 2

MONITOR RESULT INFORMATION (CATALYST-BANK 2)

Monitor ID	Test ID	Scaling	Unit	Description
$22	$A9	Multiply by 0.0003	No dimension	Oxygen storage capacity of catalyst bank 2

EVAP

MONITOR RESULT INFORMATION (EVAP)

Monitor ID	Test ID	Scaling	Unit	Description
$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)
$3D	$D8	Multiply by 0.001	kPa	Test value for canister small leak (P1420)
$3D	$D9	Multiply by 0.001	kPa	Test value for canister gross leak (P1421)
$3D	$DA	Multiply by 0.001	kPa	Test value for fuel tank small leak (P1422)
$3D	$DB	Multiply by 0.001	kPa	Test value for fuel tank gross leak (P1423)
$3D	$DC	Multiply by 0.001	kPa	Test value for fuel vapor-containment valve close stuck (P2451)
$3D	$DD	Multiply by 0.001	kPa	Test value for fuel vapor-containment valve open stuck (P2450)

Misfire

MONITOR RESULT INFORMATION (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 10 driving cycles-Total
$A1	$0C	Multiply by 1	Time	Misfire rate for all cylinders: Misfire counts for last/current driving cycles-Total
$A2	$0B	Multiply by 1	Time	EWMA misfire for cylinder 1: Misfire counts for last 10 driving cycles-Total
$A2	$0C	Multiply by 1	Time	Misfire rate for cylinder 1: Misfire counts for last/current driving cycle-Total
$A3	$0B	Multiply by 1	Time	EWMA misfire for cylinder 2: Misfire counts for last 10 driving cycles-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 10 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 10 driving cycles-Total
$A5	$0C	Multiply by 1	Time	Misfire rate for cylinder 4: Misfire counts for last/current driving cycle-Total
$A6	$0B	Multiply by 1	Time	EWMA misfire for cylinder 5: Misfire counts for last 10 driving cycles-Total
$A6	$0C	Multiply by 1	Time	Misfire rate for cylinder 5: Misfire counts for last/current driving cycle-Total
$A7	$0B	Multiply by 1	Time	EWMA misfire for cylinder 6: Misfire counts for last 10 driving cycles-Total
$A7	$0C	Multiply by 1	Time	Misfire rate for cylinder 6: Misfire counts for last/current driving cycle-Total