Engine Control System - Except Evolution & 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 fine 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 the «SYMPTOM CHART»(/mitsubishi/lancer-evolution/viii-2003-2005/remont/testing-diagnostics/#engine-control-system-except-evolution-sportback) .
4. Verify that the malfunction is eliminated.

Scheme 83

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 «ACCELERATOR CABLE CHECK AND ADJUSTMENT»(/mitsubishi/lancer-evolution/viii-2003-2005/remont/testing-diagnostics/#engine-control-system-except-evolution-sportback) and then go to Step 4 .
2. STEP 2. Check the return spring. Q: Is the return spring damaged or deformed? YES : Go to Step 3. NO : Replace, then go to Step 4 .
3. STEP 3. Check the throttle lever. Q: Is the throttle lever damaged or deformed? YES : Replace, then go to Step 4. NO : There is no action to be taken.
4. STEP 4. Check symptom. Q: Does the throttle valve fully open and close? YES : This diagnosis is complete. NO : Return to Step 1 .

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 «ACCELERATOR CABLE CHECK AND ADJUSTMENT»(/mitsubishi/lancer-evolution/viii-2003-2005/remont/testing-diagnostics/#engine-control-system-except-evolution-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 «ACCELERATOR PEDAL POSITION SENSOR <2.4L ENGINE>»(/mitsubishi/lancer-evolution/viii-2003-2005/remont/testing-diagnostics/#engine-control-system-except-evolution-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. Check symptom. Q: Does the accelerator pedal work normally? YES : This diagnosis is complete. NO : Go to Step 1 .

Scheme 84

Scheme 85

1. Turn off air conditioning and all lights. Inspect and adjust at no load.
2. Start engine and allow to idle unit it reaches normal operating temperature.
3. Confirm the idle speed is at standard value. Standard value: 700 +/- 100 r/min < 2.0L engine > 750 +/- 100 r/min < 2.4L engine >
4. Stop the 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. < 2.0L engine > Loosen the adjusting bolt to release the cable. Move the plate until the inner cable play is at the standard value, and then tighten the adjusting bolt to specified torque. Tightening torque: 5.0 +/- 1.0 N.m (44 +/- 9 in-lb)
8. If there is too much slack or no slack, adjust play by the following procedures. < 2.4L engine > 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 86

INSTALLATION SERVICE POINT

>>A<< ACCELERATOR PEDAL PAD INSTALLATION

Warm the peg of the accelerator pedal pad with a dryer before installing the pad.

Note. If it is difficult to fit, apply soapy water to the peg lightly.

Scheme 87

See also:
• SYMPTOM CHART