Description
The EVAP canister vent control valve is located on the EVAP canister and is used to seal the canister vent.
This solenoid valve responds to signals from the ECM. When the ECM sends an ON signal, the coil in the solenoid valve is energized.
A plunger will then move to seal the canister vent. The ability to seal the vent is necessary for the on board diagnosis of other evaporative emission control system components.
This solenoid valve is used only for diagnosis, and usually remains opened.
When the vent is closed, under normal purge conditions, the evaporative emission control system is depressurized and allows "EVAP Control System" diagnosis.
DTC Logic
DTC DETECTION LOGIC
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next test.
2.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
- Increase the engine speed up to between 3,000 and 3,500 rpm and maintain that speed it for 2 minutes and 50 seconds to 3 minutes.
Never exceed 3 minutes.
- Fully released accelerator pedal and keep engine idle for about 5 seconds.
- Quickly increase the engine speed up to between 4,000 and 4,500 rpm and maintain that speed it for 25 to 30 seconds.
- Fully released accelerator pedal and keep engine idle for at least 35 seconds.
Diagnosis Procedure
1.CHECK RUBBER TUBE
2.CHECK DRAIN FILTER
3.CHECK EVAP CANISTER VENT CONTROL VALVE
4.CHECK IF EVAP CANISTER IS SATURATED WITH WATER
5.CHECK EVAP CANISTER
Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor attached.
The weight should be less than 2.1 kg (4.6 lb).
6.DETECT MALFUNCTIONING PART
Check the following.
7.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR
8.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
9.CHECK INTERMITTENT INCIDENT
Component Inspection
EVAP CANISTER VENT CONTROL VALVE
1.CHECK EVAP CANISTER VENT CONTROL VALVE-I
2.CHECK EVAP CANISTER VENT CONTROL VALVE-II
With CONSULT
Check that new O-ring is installed properly
Operation takes less than 1 second
Without CONSULT
Check that new O-ring is installed properly
Operation takes less than 1 second
3.CHECK EVAP CANISTER VENT CONTROL VALVE
With CONSULT
Check that new O-ring is installed properly.
Operation takes less than 1 second.
Without CONSULT
Check that new O-ring is installed properly.
Operation takes less than 1 second.
DRAIN FILTER
How to erase permanent DTC
Description
OUTLINE
When a DTC is stored in ECM
When a DTC is stored in ECM and MIL is ON, a permanent DTC is erased with MIL
shutoff if the same malfunction
is not detected after performing the driving pattern for MIL shutoff three times
in a raw.
*1: When the same malfunction is detect ...
Diagnosis and repair workflow
Work Flow
OVERALL SEQUENCE
DETAILED FLOW
1. GET INFORMATION FOR SYMPTOM
Get the detailed information from the customer about the symptom (the
condition and the environment when
the incident/malfunction occurred).
2. CHECK DTC
Check DTC.
Perform the following procedure if DTC is di ...
Precaution
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and
"SEAT BELT PRE-TENSIONER"
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT
PRE-TENSIONER", used along with a front seat belt, helps to reduce the risk
or severity of injury to the driver and front passenger for ...