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).

Catalyst System Efficiency Below Threshold
MONITOR DESCRIPTION The ECM uses the sensors mounted in front of and behind the three-way catalyst (TWC) to monitor its efficiency. The first sensor, an Air Fuel ratio (A/F) sensor, sends pre- ...

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:

Installation
1. INSTALL REAR DIFFERENTIAL DRIVE PINION BEARING SPACER (a) Install a new bearing spacer. 2. INSTALL REAR DRIVE PINION FRONT TAPERED ROLLER BEARING (a) Install the tapered roller bearing. 3. INSTALL REAR DIFFERENTIAL DRIVE PINION OIL SLINGER (a) Install the oil slinger, as shown in the i ...

Short to B+ in Side Squib LH Circuit
DTC B0118/46 Short to B+ in Side Squib LH Circuit DESCRIPTION The side squib LH circuit consists of the center airbag sensor assembly and the front seat side airbag assembly LH (side squib LH). This circuit instructs the SRS to deploy when deployment conditions are met. DTC B0118/46 is re ...

Disassembly
1. REMOVE OIL PUMP RELIEF VALVE (A) using a 27 mm socket wrench, remove the relief valve plug. (B) remove the valve spring and oil pump relief valve. 2. REMOVE OIL PUMP COVER (a) Remove the 8 bolts, oil pump cover and oil pump rotor set. ...

© 2011-2021 Copyright www.tsienna.net