HEXA

ENGINE

187

PINOUT DETAILS

PIN NO DESCRIPTION

EGR +ve input

EGR -ve input

EGR feed back supply

EGR feed back return

EGR feed back input

INSPECTION

COLD TEST

Measure the resistance between the two connector

terminals of throttle actuator; it should be ~3 ohms

HOT TEST

1. Apply 13.5V DC to the throttle actuator and

measure the current taken by the actuator, Con-

tinuous current should not be greater than 1.0

Amperes and instantaneous current should not

be greater than 5.5 Amperes.

2. Measure the inductance of the motor coil by

applying 13.5 V AC signal with frequency of 1

KHz.

3. Inductance value should not be greater than 2.3

milli Henry.

REMOVAL

1. Drain the coolant. Refer coolant replacement

procedure in Engine “On Vehicle Repair ‘section

2. Open the bonnet and remove the engine cover.

3. Disconnect the electrical connection of the EGR

valve.

4. Loosen and remove the bolts to disconnect the

EGR pipe from the EGR cooler assembly.

NOTE

The EGR pipe is bent in the intake adaptor pipe and

cannot be removed. Do not attempt to remove it

without the intake adaptor pipe.

5. Disconnect the hose

(1)

connecting the vacuum

solenoid valve

(3)

to the By-pass actuator valve

(2)

6. Remove the spring band clamp

(2)

and discon-

nect the hose

(1)

connecting EGR coolant inlet

to the coolant outlet pipe.