Engine Control System - Evolution 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 the Symptom Chart. Refer to «SYMPTOM CHART»(/mitsubishi/lancer-evolution/viii-2003-2005/remont/testing-diagnostics/#engine-control-system-evolution) .
4. Verify that the malfunction is eliminated.

Scheme 126

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 (Refer to «ACCELERATOR CABLE CHECK AND ADJUSTMENT»(/mitsubishi/lancer-evolution/viii-2003-2005/remont/testing-diagnostics/#engine-control-system-evolution) ). Then go to Step 4 .
2. STEP 2. Check the return spring of the throttle body. Q: Is the return spring damaged or deformed? YES: Replace the throttle body (Refer to «THROTTLE BODY ASSEMBLY»(/mitsubishi/lancer-evolution/viii-2003-2005/remont/testing-diagnostics/#multiport-fuel-injection-20l-evolution) ). Then go to Step 4 . NO: Go to Step 3.
3. STEP 3. Check the throttle lever of the throttle body. Q: Is the throttle lever damaged or deformed? YES: Replace the throttle body (Refer to «THROTTLE BODY ASSEMBLY»(/mitsubishi/lancer-evolution/viii-2003-2005/remont/testing-diagnostics/#multiport-fuel-injection-20l-evolution) ). Then go to Step 4. NO: Go to Step 4.
4. STEP 4. 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 good condition? YES: Go to Step 2. NO: Replace the accelerator pedal (Refer to «ACCELERATOR CABLE AND PEDAL REMOVAL AND INSTALLATION»(/mitsubishi/lancer-evolution/viii-2003-2005/remont/testing-diagnostics/#engine-control-system-evolution) ). Then go to Step 5 .
2. STEP 2. Check the installation condition of the accelerator pedal. Q: Is the accelerator pedal loose? YES: Tighten, then go to Step 5 . NO: Go to Step 3.
3. STEP 3. Check the accelerator cable wiring. Q: Is the accelerator cable routing bent sharply? YES: Repair, then go to Step 5 . NO: Go to Step 4.
4. STEP 4. Check the accelerator cable lubricant. Q: Is the accelerator cable lubricated sufficiently? YES: Go to Step 5. NO: Refill or replace the lubricant, then go to Step 5.
5. STEP 5. Retest the system. Q: Does the accelerator pedal work normally? YES: The procedure is complete. NO: Return to Step 1 .

Scheme 127

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: 850 +/- 50 r/min
4. Stop the engine [ignition switch in the "LOCK" (OFF) position].
5. Confirm there are no sharp bends in the accelerator cable.
6. Check the inner cable for correct slack. Standard value: 1-2 mm (0.04-0.08 inch)
7. If there is too much slack or no slack, adjust the cable as follows: Loosen the adjusting bolts to release the cable. Move the plate until the inner cable play is at the standard value, and then tighten the adjusting bolts to specified torque.

Scheme 128

>> A << ACCELERATOR CABLE ASSEMBLY INSTALLATION

Securely fit the accelerator cable to the accelerator cable clamps as shown.

Scheme 129

>> B << 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.

>> C << INNER CABLE INSTALLATION

Securely fit the plastic bushing on the inner cable of the accelerator cable to the accelerator pedal arm as shown.

Scheme 130

See also:
• THROTTLE BODY ASSEMBLY
• SYMPTOM CHART