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Home >> Mitsubishi >> 1989 >> Mirage L4-1597cc 1.6L DOHC Turbo >> Repair and Diagnosis >> Powertrain Management >> Fuel Delivery and Air Induction >> Fuel Pressure Control Solenoid >> Testing and Inspection >> Non Trouble Code Components

Non Trouble Code Components

System Schematic:





To test the fuel pressure control Solenoid Valve, located on the rear bulkhead, proceed as follows.

Solenoid Test:




1. Mark and disconnect the blue striped and black vacuum hoses from the solenoid valve.
2. Disconnect the electrical harness connector.
3. Connect a manual vacuum pump to the nipple that the black hose was removed from.

4. Apply vacuum to the solenoid valve and observe the condition of the other vacuum nipple on the valve. There should be a vacuum leak at the nipple.

5. Place a finger over the nipple and apply vacuum, the valve should hold vacuum.

Solenoid Test:





6. Apply battery voltage to the solenoid valve while vacuum is applied, verify that the valve holds vacuum.

Solenoid Test:





7. Measure the resistance between the two terminals of the solenoid valve, and verify that the resistance is between 36 and 46 ohms at 20 degrees C (68 degrees F).
7. If any of the tests in steps 4 through 7 failed, replace the control solenoid valve.

HARNESS TEST

1. Disconnect the fuel pressure solenoid connector and turn on the ignition.
2. Using a voltmeter, measure the power supply voltage between the harness connector terminal 1 and ground.

Voltage: System Voltage.

3. Turn off the ignition and disconnect the ECU connector. Using an Ohmmeter, check for continuity (short) to ground, between the ECU harness connector terminal 57 and the solenoid harness connector terminal 2.

Continuity: Should Not Exist.

4. Using an Ohmmeter, check for continuity between the ECU harness connector terminal 57 and the solenoid harness connector terminal 2.

Continuity: Should Exist.


If any of the previous tests produce unsatisfactory results, the harness will need to be repaired or replaced. Once repairs have been completed, road test the vehicle to confirm that the repair has corrected the problem.

If the same problem reoccurs, it is possible that there is an intermittent failure of the component or the ECU. Check for looseness at all harness junctions and test for an intermittent failure.
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