Toyota RAV4 manuals

Toyota Sienna Service Manual: Evaporative Emission Control System Leak Detected

Evaporative Emission Control System Leak Detected

DTC SUMMARY

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).

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 only a small amount of fuel is in the fuel tank, it takes longer for the EVAP pressure to stabilize.

MONITOR DESCRIPTION

1. P0455: EVAP (Evaporative Emission) gross leak

In operation C, the vacuum pump creates negative pressure (vacuum) in the EVAP system and the EVAP system pressure is measured. If the stabilized system pressure is higher than [second 0.02 inch leak pressure standard x 0.2] (near atmospheric pressure), the ECM determines that the EVAP system has a large leak, illuminates the MIL and sets the DTC (2 trip detection logic).

2. P0456: EVAP very small leak

In operation C, the vacuum pump creates negative pressure (vacuum) in the EVAP system and the EVAP system pressure is measured. If the stabilized system pressure is higher than second 0.02 inch leak pressure standard, the ECM determines that the EVAP system has a small leak, illuminates the MIL and sets the DTC (2 trip detection logic).

P0456: EVAP very small leak

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

TYPICAL MALFUNCTION THRESHOLDS

TYPICAL MALFUNCTION THRESHOLDS

MONITOR RESULT

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

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 ...

Vehicle Speed Sensor "A"
DESCRIPTION The speed sensor detects the wheel speed and sends the appropriate signals to the skid control ECU. The skid control ECU converts these wheel speed signals into a 4-pulse signal ...

Other materials:

Engine unit
COMPONENTS ...

Checking monitor status
The purpose of the monitor result (mode 06) is to allow access to the results for on-board diagnostic monitoring tests of specific components/systems that are not continuously monitored. Examples are catalyst, evaporative emission (EVAP) and thermostat. The monitor result allows the OBD II sc ...

Shift lock system
On-vehicle inspection 1. CHECK SHIFT LOCK OPERATION (a) Move the shift lever to the P position. (b) Turn the ignition switch to the LOCK position. (c) Check that the shift lever cannot be moved to any position other than P. (d) Turn the ignition switch to the on position, depress the br ...

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