Exhaust Gas Recirculation Egr System

EGR Vacuum Modulator

EGR Valve E Port

R Port

EGR Vacuum Modulator

EGR Valve E Port

R Port

1996 Toyota Corolla Egr

Port E

Port R

Port E

Port R

Egr System Ports

EGR Vacuum modulator

EGR Valve

EGR Vacuum modulator

EGR Valve ec3611

Port E

Port R

Port E

Port R

Port E

Port R

EGR Vacuum Modulator

Port E

EGR Valve

EGR Vacuum Modulator

ec3613

Coolant Temp.

Engine RPM

(ECU)

VSV

Throttle Valve Opening Angle

Pressure in the EGR Valve Pressure Chamber

EGR Vacuum Modulator

EGR Valve

55°C (131°F)

-

-

CLOSED

-

-

-

CLOSED

Not recirculated

Above

60°C (140°F)

Below 4,000 rpm

OFF

CLOSED

Positioned below E port

-

-

CLOSED

Not recirculated

CLOSED

positioned below E port

(1)

-

-

CLOSED

Not recirculated

ON

OPEN

Positioned between E port and R port

(2) HIGH

*

CLOSESpassage to atmosphere

OPEN

Recirculated

Positioned above R port

(3) HIGH

CLOSES passage to atmosphere

(increase)

Above 4,000 rpm

OFF

CLOSED

-

-

-

CLOSED

Recirculated

* Pressure increase-►Modulator closes-►EGR valve opens-►Pressure drops

* * when the throttle valve is positioned above R port, the EGR vacuum modulator will close the atmosphere passage and open the EGR valve to increase the exhaust gas, even if the exhaust pressure is insufficiently low. * * * If terminals TE1 and E1 of check connector are connected, the VSV switches ON.

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