Toyota Corolla (E120) 2002–2008 Repair Manual / Diagnostics / Sfi system / Readiness monitor drive pattern / Catalyst monitor (o2s type)
Toyota Corolla (E120): Catalyst monitor (o2s type)
- Preconditions
The monitor will not run unless:
- mil is off.
- Engine coolant temperature (ect) is 176°f (80 °C) or greater.
- Intake air temperature (iat) is 14°f (–10 °C) or greater.*
Notice
: * 2002 and later my vehicles: the readiness test can be completed in cold ambient conditions (less than 14°f / –10 °C), if the drive pattern is repeated a second time after cycling the ignition off.
- Drive pattern
- connect the obd ii scan tool to the dlc3 to check monitor status and preconditions.
- Drive the vehicle at 40 to 55 mph (64 to 88 km/h) for approximately 3 minutes.
Notice
: drive with smooth throttle operation and avoid sudden acceleration.
If iat is less than 50°f (10 °C) when starting engine, continue to drive vehicle at 40 to 55 mph (64 to 88km/h) for approximately 4 minutes.
- Drive the vehicle at 35 to 45 mph (56 to 72 km/h) for approximately 7 minutes.
Notice
: drive with smooth throttle operation and avoid sudden deceleration as much as possible with the throttle fully closed.
- If readiness status dose not switch to complete, make sure that the preconditions are met and the ignition switch is turned off and then repeat steps (2) and (3).
- Release pressure in the fuel tank by removing and then reinstalling the fuel tank cap.
- Start the engine and immediately begin driving as directed.
Other materials:
Circuit description
The speed sensor detects wheel speed and transmits the appropriate
signals to the ecu. These signals are used for control
of the abs control system. Each of the front and rear rotors has
48 serrations.
When the rotors rotate, the magnetic field generated by the permanent
magnet in the spe ...
Circuit description
This circuit turns on the magnetic clutch inside the actuator during cruise
control operation according to the
signal from the ecu. If a malfunction occurs in the actuator or speed sensor,
etc. During cruise control operation,
the rotor shaft between the motor and control plate is released.
...
Circuit description
The shift solenoid valve sl is turned ”on” and ”off” by signals from the ecm
in order to control the hydraulic
pressure operation, the lock–up relay valve, which then the controls operation
of the lock–up clutch.
Fail safe function:
if the ecm detects a malfunction, it turns the ...