Engine Control System - Sportback Mitsubishi Lancer Evolution VIII

GENERAL DESCRIPTION

A cable-type accelerator mechanical suspended-type pedal has been adopted.

INTRODUCTION TO ENGINE CONTROL SYSTEM DIAGNOSIS

If there is a malfunction in the engine control system, the accelerator cable, accelerator pedal or throttle lever may be faulty.

ENGINE CONTROL SYSTEM DIAGNOSTIC TROUBLESHOOTING STRATEGY

Use these steps to plan your diagnostic strategy. if you follow them carefully, you will be sure that you have exhausted most of the possible ways to find an engine control system fault.

1. Gather information from the customer.
2. Verify that the condition described by the customer exists.
3. Find the malfunction by following (Scheme 28).
4. Verify that the malfunction is eliminated.

Scheme 28

DIAGNOSIS

1. STEP 1. Check the accelerator cable adjustment. Q; Is the accelerator cable properly adjusted? YES: Go to Step 2. NO: Adjust the accelerator cable by referring to «INSPECTION PROCEDURE 2: ACCELERATOR PEDAL OPERATION IS NOT SMOOTH (OVER ACCELERATION)»(/mitsubishi/lancer-evolution/viii-2003-2005/remont/testing-diagnostics/#engine-control-system-sportback) , and then go to Step 3 .
2. STEP 2. Check the accelerator pedal position sensor assembly. Check that the lever of the accelerator pedal position sensor assembly moves smoothly by moving it by hand. Q: Does the lever of the accelerator pedal position sensor assembly move smoothly? YES: Go to Step 3. NO: Replace the accelerator pedal position sensor assembly (Refer to «DIAGNOSIS»(/mitsubishi/lancer-evolution/viii-2003-2005/remont/testing-diagnostics/#engine-control-system-sportback) ), then go to Step 3.
3. STEP 3. Retest the system. Q: Does the throttle valve fully open and close? YES: The procedure is complete. NO: Return to Step 1 .

1. STEP 1. Check the accelerator pedal. Q: Is the accelerator pedal loose? YES: Tighten, then go to Step 4 . NO: Go to Step 2.
2. STEP 2. Check the accelerator cable wiring. Q: Is the accelerator cable routing bent sharply? YES: Repair, then go to Step 4 . NO: Go to Step 3.
3. STEP 3. Check the accelerator cable lubricant. Q: Is the accelerator cable lubricated sufficiently? YES: There is no action to be taken. NO: Refill or replace the lubricant, then go to Step 4.
4. STEP 4. Retest the system. Q: Does the accelerator pedal work normally? YES: The procedure is complete. NO: Return to Step 1 .

Scheme 29

1. Turn A/C and lights OFF. Inspect and adjust at no load.
2. Warm engine until stabilized at idle.
3. Confirm idle speed is at standard value. Standard value: 750 +/- 100 r/min
4. Stop engine. [ignition switch: "LOCK" (OFF) position.]
5. Confirm there are no sharp bends in the accelerator cable.
6. Check the inner cable for correct slack. Standard value: 1.0 - 2.0 mm (0.04 - 0.08 inch)
7. If there is too much slack or no slack, adjust play by the following procedures. Loosen the look nut and fully close the throttle lever. Tighten the adjusting nut until just before the throttle lever starts to move. By loosening the adjusting nut one turn, the accelerator cable slack will be brought to the standard value. Fix the adjusting nut with the look nut. After adjusting, check that the throttle lever is touching the stopper.

Scheme 30

>> A << PEDAL PAD INSTALLATION

Note. If it is difficult to assembly, apply soapy water to the thumb area to enhance the assembling process.

Scheme 31

See also:
• INSPECTION PROCEDURE 2: ACCELERATOR PEDAL OPERATION IS NOT SMOOTH (OVER ACCELERATION)