Toyota RAV4 manuals

Toyota Sienna Service Manual: Evaporative Emission System Reference Orifice

Evaporative Emission System Reference Orifice

DTC SUMMARY

DTC SUMMARY

HINT:

The 0.02 inch orifice is located inside the pump module.

DESCRIPTION

The circuit description can be found in the EVAP (Evaporative Emission) System (See page ES-409).

INSPECTION PROCEDURE

Refer to the EVAP System (See page ES-412).

MONITOR DESCRIPTION

5 hours*1 after the ignition switch is turned off, the electric vacuum pump creates negative pressure (vacuum) in the EVAP (Evaporative Emission) system. The ECM monitors for leaks and actuator malfunctions based on the EVAP pressure.

HINT:

*1: 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.

MONITOR DESCRIPTION

MONITOR DESCRIPTION

*2: If there is only a small amount of fuel in the fuel tank, stabilizing the EVAP pressure takes longer than usual.

MONITOR DESCRIPTION

MONITOR DESCRIPTION

The leak detection pump creates negative pressure through the reference orifice. When the system is normal, the EVAP pressure is in 724 to 752 mmHg* and saturated within a minute.

If not, the ECM interprets this as a malfunction. The ECM will illuminate the MIL and set DTC if this malfunction is detected in consecutive drive cycle.

*: Typical valve

MONITOR STRATEGY

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL ENABLING CONDITIONS

TYPICAL ENABLING CONDITIONS

Key-off monitor sequence 1 to 8

Key-off monitor sequence 1 to 8

Key-off monitor sequence 1 to 8

TYPICAL MALFUNCTION THRESHOLDS

TYPICAL MALFUNCTION THRESHOLDS

MONITOR RESULT

Refer to CHECKING MONITOR STATUS (See page ES-19).

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Evaporative Emission Control System Incorrect Purge Flow
DTC SUMMARY DESCRIPTION The circuit description can be found in the EVAP (Evaporative Emission) System (See page ES-409). INSPECTION PROCEDURE Refer to the EVAP System (See page ES-412). MO ...

Other materials:

High Temperature
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CD Player Mechanical Error/ CD Insertion and Ejection Error/ CD Reading Abnormal/ CD Changer Mechanical Error/ CD Insertion and Ejection Error/ CD Reading Abnormal
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Throttle / Pedal Position Sensor / Switch "A" Circuit Range / Performance Problem
HINT: This DTC relates to the Throttle Position (TP) sensor. DESCRIPTION Refer to DTC P0120 (See page ES-145). MONITOR DESCRIPTION The ECM uses the TP sensor to monitor the throttle valve opening angle. This sensor transmits two signals: VTA1 and VTA2. VTA1 is used to detect the th ...

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