Acura RSX Honda Integra. Manual — part 89
16
*15
21
Intake Air System
Intake Air Bypass Control Thermal Valve
Intake Manifold Tuning (IMT) (Intake Manifold Runner
Control (IMRC)) Valve Position Sensor (K20A3 engine)
Throttle Body
11-62
Fuel and Emissions Systems
System Description (cont’d)
OUT
IN
VALVE
WAX
ELEMENT
INJECTOR
INTAKE AIR
BYPASS CONTROL
THERMAL VALVE
ELEMENT
BRUSH HOLDER
BRUSH
TERMINAL
TP SENSOR
IAC VALVE
EVAP CANISTER
PURGE VALVE
MAP
SENSOR
Refer to the System Diagram to see the functional
layout of the system.
When the engine is running during warm up, the intake
air bypass control thermal valve sends air to the
injector.
The IMT (IMRC) position sensor is a potentiometer
connected to the IMT (IMRC) valve shaft. As the IMT
(IMRC) valve position changes, the sensor varies the
signal voltage to the ECM/PCM.
The throttle body is a single-barrel side draft type. The
lower portion of the IAC valve is heated by engine
coolant from the cylinder head.
05/06/27 17:32:43 61S6M040_110_0062
22
23
24
Catalytic Converter System
Positive Crankcase Ventilation (PCV) System
Three Way Catalytic Converter (TWC)
K20A2/K20Z1 engines
K20A3 engine
11-63
FRONT OF
VEHICLE
HOUSING
THREE WAY
CATALYST
BREATHER PIPE
PCV
VALVE
INTAKE MANIFOLD
PCV
HOSE
: BLOW-BY VAPOR
: FRESH AIR
BREATHER PIPE
PCV
VALVE
INTAKE MANIFOLD
PCV
HOSE
: BLOW-BY VAPOR
: FRESH AIR
The TWC converts hydrocarbons (HC), carbon
monoxide (CO), and oxides of nitrogen (NOx) in the
exhaust gas to carbon dioxide (CO ), dinitrogen (N ),
and water vapor.
The PCV valve prevents blow-by gasses from escaping
into the atmosphere by venting them into the intake
manifold.
(cont’d)
2
2
05/06/27 17:32:44 61S6M040_110_0063
*16
34
*17
*18
−
−
Evaporative Emission (EVAP) Control
System
EVAP Canister
EVAP Canister Purge Valve
2002-2004 Models
EVAP Canister Purge Valve
2005-2006 Models
Fuel Tank Pressure (FTP) Sensor
2002-2004 models
2005-2006 models
EVAP Two Way Valve and EVAP Bypass Solenoid
Valve (2002-2004 Models)
EVAP Canister Vent Shut Valve
11-64
Fuel and Emissions Systems
System Description (cont’d)
SENSOR UNIT
CIRCUIT
ASSEMBLY
TERMINAL
O-RING
TERMINAL
SENSOR UNIT
EVAP BYPASS
SOLENOID VALVE
To FTP SENSOR
To FUEL TANK
VALVE
DIAPHRAGM
VALVE
To EVAP
CANISTER
TERMINAL
O-RING
TERMINAL
VALVE
Refer to the System Diagram to see the functional
layout of the system.
The EVAP canister temporarily stores fuel vapor from
the fuel tank until it can be purged back into the engine
and burned (refer to the System Diagram to see the
functional layout of the system).
When the engine coolant temperature is below 149 °F
(65 °C), the ECM/PCM turns off the EVAP canister purge
valve which cuts vacuum to the EVAP canister.
When the engine coolant temperature is below 140 °F
(60 °C), the ECM/PCM turns off the EVAP canister purge
valve which cuts vacuum to the EVAP canister.
The FTP sensor converts fuel tank absolute pressure
into an electrical input to the ECM/PCM.
The EVAP two way valve is installed between the fuel
tank and the EVAP canister.
The EVAP two way valve sends fuel vapor into the
EVAP canister corresponding to the pressure inside the
fuel tank and relieves excess vacuum by drawing fresh
air in through the canister.
The EVAP bypass solenoid valve opens to bypass the
two way valve when doing at the EVAP leak check.
The EVAP canister vent shut valve is on the EVAP
canister.
The EVAP canister vent shut valve control the venting of
the EVAP canister.
*: This illustration shows 2005-2006 models.
05/06/27 17:32:44 61S6M040_110_0064
36
37
Fuel Cap Warning Message (2005-2006
Models)
First drive cycle
To make the message go off
Second drive cycle
Third drive cycle
11-65
A
Shows ’’CHECK FUEL CAP’’ in the
odometer/trip meter display
and stores Temporary DTC
Stores DTC and MIL comes on
A
The ECM/PCM detects whether the fuel fill cap is loose
or missing under certain conditions and alerts the
driver by showing the information in the odometer/trip
meter display. If the ECM/PCM detects a small volume
leak, the MIL may come on during the second drive
cycle and store a DTC.
During the first drive cycle after a cold start, the ECM/
PCM alerts the driver to check the fuel fill cap by
showing a ‘‘CHECK FUEL CAP’’ message in the
odometer/trip meter display (A), and it stores
Temporary DTC P0457 ‘‘Evaporative Emission (EVAP)
System Leak Detected/Fuel Cap Loose or Missing’’.
Tightening the fuel cap does not make the message go
off immediately.
Tighten the fuel fill cap properly, and do this procedure
several times.
1. Turn the ignition switch OFF.
2. Start the engine, and drive at a steady speed over
28 mph (45 km/h), without moving the accelerator
pedal, for about 1 minute.
During the second drive cycle after a cold start, if the
fuel fill cap is still loose or missing, the ECM/PCM alerts
the driver to check the fuel fill cap by showing a
‘‘CHECK FUEL CAP’’ message in the odometer/trip
meter display as same as the first drive cycle.
Tightening the fuel cap does not make the message go
off immediately.
During the third drive cycle after a cold start, if the fuel
fill cap is still loose or missing, the ECM/PCM stores
DTC P0457 ‘‘Evaporative Emission (EVAP) System Leak
Detected/Fuel Cap Loose or Missing’’. The malfunction
indicator lamp (MIL) (A) comes on, and the ‘‘CHECK
FUEL CAP’’ message goes off.
(cont’d)
05/06/27 17:32:45 61S6M040_110_0065
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст