OPERATIONS AFTER ENGINE IS WARMED UP
PERIODIC INSPECTION AND MAINTENANCE
2-45
2. Connect a hand vacuum pump to the exhaust gas
recirculation valve.
3. Apply 67 kPa of vacuum, and check that the
vacuum is maintained.
4. Apply a vacuum and check the passage of air by
blowing through one side of the exhaust gas
recirculation passage.
5. Replace the gasket, and tighten to the specified
torque.
Tightening torque: 23 ± 6 N⋅ m
EGR CONTROL SOLENOID VALVE
CHECK <6G72>
NOTE: When disconnecting the vacuum hose,
always make a mark so that it can be reconnected at
original position.
1. Disconnect the vacuum hose from the solenoid
valve.
2. Disconnect the harness connector.
3. Connect a hand vacuum pump to nipple (A) of the
solenoid valve.
4. Check air tightness by applying a vacuum with
voltage applied directly from the battery to the
exhaust gas recirculation control solenoid valve
and without applying voltage.
5. Measure the resistance between the terminals of
the solenoid valve.
Standard value: 29 − 35 Ω (at 20° C)
EGR VALVE (STEPPER MOTOR) CHECK
<6G75>
Checking the Operation Sound
1. Check that the operation sound of the stepper
motor can be heard from the exhaust gas
recirculation valve when the ignition switch is
turned ON (without starting the engine).
2. If the operation sound cannot be heard, inspect
the drive circuit of the stepper motor.
NOTE: If the circuit is normal, either the stepper
motor or the engine-ECU <M/T> or engine-A/T-ECU
<A/T> may have failed.
Checking the Coil Resistance
1. Remove the exhaust gas recirculation valve.
Vacuum Passage of air
5.6 kPa or less Air is not blown out
29 kPa or more Air is blown out
Battery
voltage
Nipple
condition
Normal condition
Applied Open Vacuum leaks
B nipple
closed
Vacuum maintained
Not applied Open Vacuum leaks
C nipple
closed
Vacuum maintained
AK100015
B
A
C
AF
Battery
AK100016
AK602173AB
Exhaust gas
recirculation valve
(stepper motor)
AK200805
123
456
123
456
AC
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