OPERATIONS AFTER ENGINE IS WARMED UP
PERIODIC INSPECTION AND MAINTENANCE
2-47
EGR VALVE (DC MOTOR) CHECK <4M41>
System Check
1. Connect the M.U.T.-III to the diagnosis connector
to check for date list item No. 16.
2. Start the engine, and warm up the engine.
3. Raise the engine speed gradually, and make sure
that the valve open degree changes from 0 % to
100 %.
Operation Check
1. Remove the exhaust gas recirculation valve.
2. Connect the terminal (+) of the sensor power
supply (5 V) with the terminal No. 3 of the exhaust
gas recirculation valve connector, and connect the
terminal (
−
) of the sensor power supply (5 V) with
the terminal No. 2.
3. A tester is to be connected between the terminal
No.1 and No. 2.
4. Connect the terminal (+) of the power supply with
the terminal No. 6 of the exhaust gas recirculation
valve connector, and connect the terminal (
−
) of
the power supply with the terminal No. 4. Confirm
the exhaust gas recirculation valve is opened.
NOTE: At this time, the power supply voltage is to
be 5 V. When the valve is not opened, increase
the voltage 1 V by 1 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.
5. Confirm the voltage is changed between the
terminal No. 1 and No. 2 together with the exhaust
gas recirculation valve opening movement.
6. By the voltage changed, the DC is recognized as
being normal.
7. Use a new gasket and tighten the installation bolt
to the tightening torque.
Tightening torque: 48
±
6 N
⋅
m
Cleaning the EGR Valve
CAUTION
Do not use a solvent or detergent, which could
enter the motor and cause it to malfunction.
1. Remove the exhaust gas recirculation valve and
check that the exhaust gas recirculation valve is
not stuck or clogged with carbon deposits. Use a
wire brush to clean the valve if necessary.
2. Using a new gasket, install the exhaust gas
recirculation valve by tightening its mounting bolts
to the specified torque.
Tightening torque: 48
±
6 N
⋅
m
AK602177AB
Exhaust gas recircilation valve
(Exhaust gas recircilation sensor built)
AK500440
1
2 3
4
5 6
AC
Exhaust gas
recirculation
valve
AK603110
1
2 3
4
5 6
AB
5 V
5 V
AK500442AB
Valve open
Содержание PAJERO IV
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