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1.Start the engine and warm
up. Allow the engine coolant temperature to reach above
70°C.
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![](../../../img/17/ACF00150AB00ENG.png)
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2.Turn the ignition switch
to "LOCK" (OFF) position. Confirm that the operating noise
of the EGR valve, such as the clicking noise, can be heard
three times when the engine is stopped. 3.If the
operating noise cannot be heard, check the driving circuit
of the DC motor.
note |
If the operating noise cannot
be heard although the circuit is normal, There
can possibly be something wrong with the EGR
valve.
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1.Prepare the power supply
(5 - 9 V) for the check.
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![](../../../img/17/ACF00153AB00ENG.png)
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2.Remove the EGR pipe
"A". 3.Disconnect the EGR valve
connector.
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![](../../../img/17/ACE01517AB00ENG.png)
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4.
caution |
At this time, the power supply
voltage is to be 5 V. For each voltage, current
is to be applied within 5 seconds. Once the
valve is opened, the voltage is not to be
increased any more. The supply voltage to the
motor must be a maximum of 9 V.
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Connect the terminal No. 4 of the EGR valve
connector with the positive terminal of the power supply of
the check (5 V). Connect the terminal No. 6 of the EGR valve
connector with the negative terminal of the power supply of
the check. 5.Apply the power supply of 5 V to the
EGR valve. Confirm that the EGR valve is opened. If the
valve is not opened, increase the voltage of the power
supply for the check by 1 V each time.
note |
If the EGR valve is not opened
although the voltage applied to the motor is
increased to 9 V, clean the EGR valve and carry
out the operation check again. Despite this,
replace the EGR valve if it does not
operate.
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6.Install the EGR pipe "A" (Refer to ).
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![](../../../img/17/ACF00154AB00ENG.png)
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1.Remove the EGR pipe
"B".
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![](../../../img/17/ACF00310AB00ENG.png)
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2.Connect the hand vacuum
pump with the nipple of the vacuum actuator of the EGR
valve. 3.Gradually applying the vacuum pressure,
confirm through the hole produced by removing the EGR pipe
"B" that the bypass valve shaft is normally operated. When
the vacuum pressure reaches 70 kPa, confirm that the vacuum
pressure is maintained. 4.If the bypass valve
shaft is not operated, replace the EGR
valve. 5.Install the EGR pipe "B" (Refer to ).
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![](../../../img/17/ACE01520AB00ENG.png)
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2.Confirm that there is not
the carbon stuck or accumulated on the EGR valve (at the DC
motor driven side). If the carbon is stuck or accumulated on
the valve (at the DC motor driven side), use the wire brush
and so on to clean the valve. 3.Install the EGR
valve (Refer to ).
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