Toyota RAV4 (XA40) 2013-2018 Service Manual: Evaporative emission system switching valve control
Dtc summary
Hint:
The vent valve is built into the canister pump module.
Description
The description can be found in the evap (evaporative emission) system (see page es-335).
Inspection procedure
Refer to the evap system (see page es-340).
Monitor description
5 Hours* after the ignition switch is turned off, the leak detection pump creates negative pressure (vacuum) in the evap system. The ecm monitors for leaks and actuator malfunctions based on the evap pressure.
Hint:
*: If the engine coolant temperature is not below 35°c (95°f) 5 hours after the ignition switch is turned off, the monitor check starts 2 hours later. If it is still not below 35°c (95°f) 7 hours after the ignition switch is turned off, the monitor check starts 2.5 Hours later.
*: If only a small amount of fuel is in the fuel tank, it takes longer for the evap pressure to stabilize.
- P2419: vent valve stuck closed
In operation b, the leak detection pump creates negative pressure (a vacuum) through the reference orifice. The evap system pressure is then measured by the ecm, using the canister pressure sensor, to determine the reference pressure. If the pressure exceeds -1.057 Kpa-g (-7.93 Mmhg-g) 4 seconds after the leak detection pump is turned on, the ecm interprets this as the vent valve being stuck closed.
The ecm illuminates the mil and sets the dtc (2 trip detection logic).
- P2420: vent valve stuck open (vent)
In operation c, the vent valve turns on (closes) and the evap system pressure is then measured by the ecm, using the canister pressure sensor, to conduct an evap leak check. If the pressure does not increase when the vent valve is open, the ecm interprets this as the vent valve being stuck open. The ecm illuminates the mil and sets the dtc.
Monitor strategy
Typical enabling conditions
Typical malfunction thresholds
"Saturated" indicates that the evap pressure change is less than 0.286 Kpa-g (2.14 Mmhg-g) in 60 seconds.
Monitor result
Refer to checking monitor status (see page es-17).
Evaporative emission leak detection pump
Dtc summary
Hint:
The leak detection pump is built into the canister pump module.
Description
The description can be found in the evap (evaporative emission) system (see
page es-335).
I ...
Ecm / pcm internal engine off timer performance
Dtc summary
Description
To ensure the accuracy of the evap (evaporative emission) monitor values, the
soak timer, which is built
into the ecm, measures 5 hours (+-15 minutes) from when th ...
Other materials:
Vc output circuit
Description
The ecm constantly generates 5 v power from the battery voltages supplied to
the +b (batt) terminal to
operate the microprocessor. The ecm also provides this power to the sensors
through the vc output
circuit.
When the vc circuit is short-circuited, the microprocessor in the ...
If your vehicle has to
be stopped in an
emergency
Only in an emergency, such as if it becomes impossible to stop
the vehicle in the normal way, stop the vehicle using the following
procedure:
Steadily step on the brake pedal with both feet and firmly depress it.
Do not pump the brake pedal repeatedly as this will increase the effort
req ...
Pressure control solenoid "B" performance (shift solenoid valve sl2)
Description
The ecm uses signals from the output shaft speed sensor and input speed
sensor to detect the actual
gear position (1st, 2nd, 3rd or o/d gear).
Then the ecm compares the actual gear with the shift schedule in the ecm memory
to detect mechanical
problems of the shift solenoid ...
