Monitors, Trips, Drive Cycles and Readiness Codes

3MZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: READINESS MONITOR DRIVE PATTERN

READINESS MONITOR DRIVE PATTERN

1. PURPOSE OF READINESS TESTS

- The On-Board Diagnostic (OBD II) system is designed to monitor the performance of emission related components, and indicate any detected abnormalities with DTCs (Diagnostic Trouble Codes). Since various components need to be monitored in different driving conditions, the OBD II system is designed to run separate monitoring programs called Readiness Monitors.
- The Techstream software must be version 9.0 or newer to view the Readiness Monitor Status. To view the status, enter the following menus: Powertrain / Engine and ECT / Data List / Status 2.
- When the Readiness Monitor status reads Complete, the necessary conditions have been met for running the performance tests for that Readiness Monitor.
- A generic OBD II scan tool can also be used to view the Readiness Monitor status.
HINT: Many state Inspection and Maintenance (I/M) programs require a vehicle's Readiness Monitor status to show Complete before beginning emissions tests.
The Readiness Monitor will be reset to Incomplete if:
- The ECM (included in the hybrid vehicle control ECU) has lost battery power or blown a fuse.
- DTCs have been cleared.
- The conditions for running the Readiness Monitor have not been met.
If the Readiness Monitor Status shows Incomplete, follow the appropriate Readiness Monitor Drive Pattern to change the status to Complete.
CAUTION: Strictly observe posted speed limits, traffic laws, and road conditions when performing these drive patterns.
NOTE: The drive patterns represent the fastest method of satisfying all conditions necessary to achieve complete status for each specific Readiness Monitor.

If a drive pattern is interrupted (possibly due to factors such as traffic conditions), the drive pattern can be resumed. In most cases, the Readiness Monitor will still achieve complete status upon completion of the drive pattern.
To ensure completion of the Readiness Monitors, avoid sudden changes in vehicle load and speed (driving up and down hills and/or sudden acceleration).
2. CATALYST MONITOR (AIR FUEL RATIO SENSOR TYPE)





(a) Preconditions
- The monitor will not run unless:
- The MIL is OFF.

(b) Drive Pattern
(1) Connect the Techstream to the DLC3.
(2) Turn the power switch on (IG).
(3) Turn the Techstream on.
(4) Clear the DTCs (if set) Component Tests and General Diagnostics.
(5) Turn the power switch on (READY).
(6) Warm up the engine [A].
(7) Drive the vehicle at between 47 mph and 55 mph (75 km/h and 88 km/h) for at least 10 minutes [B].
(c) Monitor Status
Check the Readiness Monitor status displayed on the tester.
If the status does not switch to Complete, extend the driving time.
3. EVAP SYSTEM MONITOR (KEY OFF TYPE)
(a) Preconditions
The monitor will not run unless:
- The fuel tank is less than 90% full.
- The altitude is less than 8000 ft. (2450 m).
- The vehicle is stationary.
- The engine coolant temperature is between 4.4°C and 35°C (40°F and 95°F).
- The intake air temperature is between 4.4°C and 35°C (40°F and 95°F).
- The vehicle was driven in the city area (or on a freeway) for 10 minutes or more.

(b) Monitor Conditions
(1) Turn the power switch off and wait for 9.5 hours.
HINT: Do not start the engine until checking Readiness Monitor status. If the engine is started, the step described above must be repeated.

(c) Monitor Status
(1) Connect the Techstream to the DLC3.
(2) Turn the power switch on (IG).
(3) Turn the Techstream or scan tool on.
(4) Check the Readiness Monitor status displayed on the Techstream or scan tool.
If the status does not switch to Complete, restart the engine, make sure that the preconditions have been met, and then perform the Monitor Conditions again.
4. AIR FUEL RATIO AND HEATED OXYGEN SENSOR MONITORS (FRONT AIR FUEL RATIO AND REAR HEATED OXYGEN SENSOR TYPE)





(a) Preconditions
- The monitor will not run unless:

- 2 minutes or more have elapsed since the engine was started.
- The engine coolant temperature is 75°C (167°F) or more.
- Cumulative driving time at a vehicle speed of 44 mph (70 km/h) or more exceeds 6 minutes.
- Air-fuel ratio feedback control is performed.

(b) Drive Pattern for front air fuel ratio sensor and heated oxygen sensor
(1) Connect the Techstream to the DLC3.
(2) Turn the power switch on (IG).
(3) Turn the Techstream on.
(4) Clear the DTCs Component Tests and General Diagnostics.
(5) Turn the power switch on (READY).
(6) Warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.
(7) Drive the vehicle at between 44 mph (70 km/h) and 55 mph (88 km/h) for at least 10 minutes.
(8) Accelerate the vehicle to 44 mph (70 km/h) or more by depressing the accelerator pedal for at least 10 seconds.
(9) Soon after performing step (8) above, release the accelerator pedal for at least 5 seconds without depressing the brake pedal in order to execute fuel-cut control.
(10) Allow the vehicle to decelerate until the vehicle speed declines to less than 6 mph (10 km/h).
(11) Repeat steps (8) through (10) above at least 3 times in one driving cycle.
(c) Monitor Status
(1) Check the Readiness Monitor status displayed on the tester.
(2) If the status does not switch to Complete, make sure that the preconditions have been met, and then perform steps (5) through (11) in the Drive Pattern above.
5. AIR FUEL RATIO AND HEATED OXYGEN SENSOR HEATER MONITORS (FRONT AIR FUEL RATIO AND REAR HEATED OXYGEN SENSOR SENSOR TYPE)
(a) Preconditions





The monitor will not run unless:
The MIL is OFF
(b) Drive Pattern
(1) Connect the Techstream to the DLC3.
(2) Turn the power switch on (IG).
(3) Turn the Techstream or scan tool on.
(4) Clear the DTCs (if set).
(5) Put the engine in inspection mode Check Mode Procedure.
(6) Start the engine.
(7) Allow the engine to idle for 10 minutes or more [A].
(8) Drive the vehicle at 25 mph (40 km/h) or more for at least 2 minutes [B].
1 Monitor Status
1 Check the Readiness Monitor status displayed on the Techstream or scan tool.
If the status does not switch to Complete, make sure that the preconditions have been met, and repeat the preceding steps through (5) to (8).