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 the Lexus diagnostic tester is used in the following instructions, 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. 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. Refer to READINESS MONITOR DRIVE PATTERN . Do not turn the engine switch off.
      NOTE:

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

2. ACCESS MONITOR RESULT 
   1. Select the following menu items: 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.
3. 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 might 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.

   Advance / Retarded Intake Side

   BANK 1
   
   

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

   Advance / Retarded Intake Side

   BANK 2
   
   

   Monitor ID	Test ID	Scaling	Unit	Description
   $36	$81	Multiply by 0.01	Second	Forced movement of oil control valve time

   Advance / Retarded Exhaust Side

   BANK 1
   
   

   Monitor ID	Test ID	Scaling	Unit	Description
   $35	$85	Multiply by 0.01	Second	Forced movement of oil control valve time

   Advance / Retarded Exhaust Side

   BANK 2
   
   

   Monitor ID	Test ID	Scaling	Unit	Description
   $36	$85	Multiply by 0.01	Second	Forced movement of oil control valve time

   A/F SENSOR BANK 1
   
   

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

   A/F SENSOR BANK 2
   
   

   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 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	$8B	Multiply by 0.001	Seconds	0.35 - 0.2 V sensor switch time
   $06	$8D	Multiply by 0.001	Seconds	Duration that sensor voltage drops to 0.2 V during fuel-cut
   $06	$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

   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 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	Total EWMA misfire count of all cylinders in last ten driving cycles EWMA: Exponential Weighted Moving Average
   $A1	$0C	Multiply by 1	Time	When engine switch is on (IG), 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 engine switch is on (IG), 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 2 in last ten driving cycles
   $A3	$0C	Multiply by 1	Time	When engine switch is on (IG), 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 3 in last ten driving cycles
   $A4	$0C	Multiply by 1	Time	When engine switch is on (IG), 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 4 in last ten driving cycles
   $A5	$0C	Multiply by 1	Time	When engine switch is on (IG), 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.
   $A6	$0B	Multiply by 1	Time	Total EWMA misfire count of cylinder 5 in last ten driving cycles
   $A6	$0C	Multiply by 1	Time	When engine switch is on (IG), total misfire count of cylinder 5 in last driving cycle is displayed. While engine is running, total misfire count of cylinder 5 in current driving cycle is displayed.
   $A7	$0B	Multiply by 1	Time	Total EWMA misfire count of cylinder 6 in last ten driving cycles
   $A7	$0C	Multiply by 1	Time	When engine switch is on (IG), total misfire count of cylinder 6 in last driving cycle is displayed. While engine is running, total misfire count of cylinder 6 in current driving cycle is displayed.