Emission Control Mfi: Other Mitsubishi Outlander III

VACUUM HOSE CHECK

1. Using the VACUUM HOSE ROUTING diagram as a guide, check that the vacuum hoses are correctly connected.
2. Check the connection condition of the vacuum hoses which can be removed, loosened, clogged possibly. And then check whether there are no folded and damaged vacuum hoses.

EGR VALVE (STEPPER MOTOR) CHECK

Required Special Tool

MB991658: Test Harness Set

Scheme 21

1. Check that the operation sound of the stepper motor can be heard from the EGR 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 operation sound is not heard, and the circuit is normal, either the stepper motor or the ECM may have failed.

Scheme 22

1. Remove the EGR valve.
2. Measure the resistance between terminal No. 2 and either terminal No. 1 or terminal No. 3 of the connector at the EGR valve. Standard value: 20 - 24 ohms [at 20°C (68°F)]
3. If the resistance is not within the standard, replace the EGR valve.
4. Measure the resistance between terminal No. 5 and either terminal No. 6 or terminal No. 4 of the connector at the EGR valve. Standard value: 20 - 24 ohms [at 20°C (68°F)]
5. If the resistance is not within the standard, replace the EGR valve.

Scheme 23

Scheme 24

Scheme 25

1. Remove the EGR valve.
2. Connect special tool MB991658 to the EGR valve.
3. Connect the battery positive (+) terminal to terminal No. 2. CAUTION: Connecting battery voltage to the EGR valve for a long time could damage the coil.
4. Connect terminals 1 and 3 to the negative (-) terminal of the battery, in order to test whether the stepper motor vibrates (with a slight shudder), indicating that the stepper motor is operating.
5. Connect the battery positive (+) terminal to terminal No. 5. CAUTION: Connecting battery voltage to the EGR valve for a long time could damage the coil.
6. Connect terminals 4 and 6 to the negative (-) terminal of the battery, in order to test whether the stepper motor vibrates (with a slight shudder), indicating that the stepper motor is operating.
7. If vibrations can be felt as a result of the test, the stepper motor is determined to be normal.
8. Using a new gasket, install the EGR valve by tightening its mounting bolts to the specified torque. Tightening torque: 24 ± 3 N.m (212 ± 27 in-lb)

Scheme 26

Scheme 27

Scheme 28

Scheme 29

1. Install each gasket with its protrusion being positioned as shown in the illustration.
2. Tighten each mounting bolt to the specified torque in the order as shown in the illustration. Tightening torque: 20 ± 2 N.m (15 ± 1 ft-lb)