Honda Element. Manual — part 537

control thermal valve closes, stopping air to the injector.

Fig. 44: Identifying Intake Air Bypass Control Thermal Valve
Courtesy of AMERICAN HONDA MOTOR CO., INC.

CATALYTIC CONVERTER SYSTEM

Three Way Catalytic Converter (TWC)

The TWC converts hydrocarbons (HC), carbon monoxide (CO), and oxides of nitrogen (NOx) in the exhaust
gas to carbon dioxide (CO

2

), nitrogen (N

2

), and water vapor.

Fig. 45: Identifying Three Way Catalytic Converter (TWC)
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Positive Crankcase Ventilation (PCV) System

The PCV valve prevents blow-by gasses from escaping into the atmosphere by venting them into the intake
manifold.

2007 Honda Element EX

2007-2008 ENGINE PERFORMANCE Fuel and Emissions Systems - Element

Fig. 46: Identifying Positive Crankcase Ventilation (PCV) System
Courtesy of AMERICAN HONDA MOTOR CO., INC.

EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM

Refer to the SYSTEM DIAGRAM to see a functional layout of the system.

EVAP Canister

The EVAP canister temporarily stores fuel vapor from the fuel tank until it can be purged from the EVAP
canister into the engine and burned.

EVAP Canister Purge Valve

When the engine coolant temperature is below 131°F (55°C), the ECM/PCM turns off the EVAP canister purge
valve which cuts vacuum to the EVAP canister.

Fuel Tank Pressure (FTP) Sensor

The FTP sensor converts fuel tank absolute pressure into an electrical input to the ECM/PCM.

2007 Honda Element EX

2007-2008 ENGINE PERFORMANCE Fuel and Emissions Systems - Element

Fig. 47: Identifying Fuel Tank Pressure (FTP) Sensor
Courtesy of AMERICAN HONDA MOTOR CO., INC.

EVAP Canister Vent Shut Valve

The EVAP canister vent shut valve is on the EVAP canister.

This valve controls the venting of the EVAP canister.

Fig. 48: Identifying EVAP Canister Vent Shut Valve
Courtesy of AMERICAN HONDA MOTOR CO., INC.

FUEL CAP WARNING MESSAGE

The ECM/PCM will detect a loose or missing fuel fill cap as an evaporative system leak and alerts the driver by
showing a warning message in the odo/trip meter display.

First drive cycle

The first time a leak is detected a "CHECK FUEL CAP" message in the odo/trip meter display (A). To scroll to
another message, press the select/reset button. The "CHECK FUEL CAP" message will appear each time you
restart the engine unit the system turns the message off. Turn the engine off, then replace or tighten the fuel fill
cap until it clicks at least once. The message should go off after several days of normal driving after the fuel fill
cap has been tightened or replaced.

2007 Honda Element EX

2007-2008 ENGINE PERFORMANCE Fuel and Emissions Systems - Element

Fig. 49: Identifying Odo/Trip Meter Display
Courtesy of AMERICAN HONDA MOTOR CO., INC.

TO MAKE THE MESSAGE GO OFF (WITH THE HDS)

Procedure

1. Tighten the fuel fill cap until it clicks.

2. Clear the Temporary DTC with the HDS.

3. Verify there is no leak by doing the EVAP FUNCTION TEST in the INSPECTION MENU with the

HDS.

TO MAKE THE MESSAGE GO OFF (WITHOUT THE HDS)

Procedure

1. Tighten the fuel fill cap until it clicks.

2. Turn the ignition switch ON (II), then turn the ignition switch OFF.

3. Do this procedure three times in all.

ELECTRONIC THROTTLE CONTROL SYSTEM DIAGRAM

The electronic throttle control system consists of the throttle actuator, throttle position (TP) sensor A/B,
accelerator pedal position (APP) sensor A/B, throttle actuator control module, throttle actuator control module
relay, and the ECM/PCM.

2007 Honda Element EX

2007-2008 ENGINE PERFORMANCE Fuel and Emissions Systems - Element