Mitsubishi Eclipse. Manual — part 680
17-1
GROUP 17
ENGINE AND
EMISSION CONTROL
CONTENTS
ENGINE CONTROL . . . . . . . . . .
GENERAL DESCRIPTION . . . . . .
ENGINE CONTROL SYSTEM
DIAGNOSIS . . . . . . . . . . . . . . . . . .
INTRODUCTION TO ENGINE CONTROL
SYSTEM DIAGNOSIS . . . . . . . . . . . . . .
ENGINE CONTROL SYSTEM DIAGNOSTIC
TROUBLESHOOTING STRATEGY . . .
SYMPTOM CHART . . . . . . . . . . . . . . . .
SYMPTOM PROCEDURES . . . . . . . . .
ON-VEHICLE SERVICE. . . . . . . . .
ACCELERATOR CABLE CHECK AND
ADJUSTMENT. . . . . . . . . . . . . . . . . . . .
ACCELERATOR CABLE AND
PEDAL . . . . . . . . . . . . . . . . . . . . . .
REMOVAL AND INSTALLATION . . . . .
AUTO-CRUISE CONTROL . . . .
GENERAL DESCRIPTION . . . . . .
SPECIAL TOOLS. . . . . . . . . . . . . .
AUTO-CRUISE CONTROL SYSTEM
DIAGNOSIS . . . . . . . . . . . . . . . . . .
INTRODUCTION TO AUTO-CRUISE
CONTROL SYSTEM DIAGNOSIS . . . . .
AUTO-CRUISE CONTROL SYSTEM
DIAGNOSTIC TROUBLESHOOTING
STRATEGY . . . . . . . . . . . . . . . . . . . . . .
AUTO-CRUISE CONTROL SYSTEM
DIAGNOSTIC FUNCTION . . . . . . . . . . .
DIAGNOSTIC TROUBLE CODE CHART
DIAGNOSTIC TROUBLE CODE
PROCEDURES . . . . . . . . . . . . . . . . . . .
SYMPTOM CHART . . . . . . . . . . . . . . . .
SYMPTOM PROCEDURES . . . . . . . . . .
DATA LIST REFERENCE TABLE . . . . .
CHECK AUTO-CRUISE CONTROL-ECU
TERMINALS . . . . . . . . . . . . . . . . . . . . . .
ON-VEHICLE SERVICE . . . . . . . . .
AUTO-CRUISE CONTROL SWITCH
CHECK . . . . . . . . . . . . . . . . . . . . . . . . . .
AUTO-CRUISE CONTROL SYSTEM
COMPONENT CHECK. . . . . . . . . . . . . .
AUTO-CRUISE CONTROL. . . . . . .
REMOVAL AND INSTALLATION. . . . . .
EMISSION CONTROL . . . . . . .
GENERAL DESCRIPTION . . . . . . .
DIAGNOSIS . . . . . . . . . . . . . . . . . .
SPECIAL TOOLS . . . . . . . . . . . . . .
Continued on next page
17-2
VACUUM HOSES . . . . . . . . . . . . .
VACUUM HOSE ROUTING. . . . . . . . . .
VACUUM CIRCUIT DIAGRAM . . . . . . .
VACUUM HOSE INSTALLATION . . . . .
VACUUM HOSE CHECK. . . . . . . . . . . .
POSITIVE CRANKCASE
VENTILATION SYSTEM . . . . . . . .
GENERAL DESCRIPTION (POSITIVE
CRANKCASE VENTILATION SYSTEM)
COMPONENT LOCATION . . . . . . . . . .
POSITIVE CRANKCASE VENTILATION
SYSTEM CHECK. . . . . . . . . . . . . . . . . .
POSITIVE CRANKCASE VENTILATION
VALVE CHECK . . . . . . . . . . . . . . . . . . .
EVAPORATIVE EMISSION
CONTROL SYSTEM . . . . . . . . . . .
GENERAL DESCRIPTION (EVAPORATIVE
EMISSION SYSTEM) . . . . . . . . . . . . . .
COMPONENT LOCATION . . . . . . . . . .
PURGE CONTROL SYSTEM CHECK
(PURGE FLOW CHECK). . . . . . . . . . . .
EVAPORATIVE EMISSION PURGE
SOLENOID CHECK. . . . . . . . . . . . . . . .
VOLUME AIRFLOW SENSOR CHECK.
BAROMETRIC PRESSURE SENSOR
CHECK . . . . . . . . . . . . . . . . . . . . . . . . .
ENGINE COOLANT TEMPERATURE
SENSOR CHECK . . . . . . . . . . . . . . . . .
INTAKE AIR TEMPERATURE SENSOR
CHECK . . . . . . . . . . . . . . . . . . . . . . . . .
FUEL TANK DIFFERENTIAL PRESSURE
SENSOR CHECK . . . . . . . . . . . . . . . . .
EVAPORATIVE EMISSION VENTILATION
SOLENOID CHECK. . . . . . . . . . . . . . . .
EXHAUST GAS RECIRCULATION
(EGR) SYSTEM . . . . . . . . . . . . . . .
GENERAL DESCRIPTION (EXHAUST GAS
RECIRCULATION SYSTEM) . . . . . . . . .
COMPONENT LOCATION. . . . . . . . . . .
EXHAUST GAS RECIRCULATION
SYSTEM CHECK . . . . . . . . . . . . . . . . . .
VACUUM CONTROL VALVE CHECK . .
EGR VALVE CHECK . . . . . . . . . . . . . . .
EGR PORT VACUUM CHECK. . . . . . . .
EGR VACUUM REGULATOR SOLENOID
VALVE CHECK . . . . . . . . . . . . . . . . . . .
VOLUME AIRFLOW SENSOR CHECK .
ENGINE COOLANT TEMPERATURE
SENSOR CHECK. . . . . . . . . . . . . . . . . .
CRANKSHAFT POSITION SENSOR
CHECK . . . . . . . . . . . . . . . . . . . . . . . . . .
EVAPORATIVE EMISSION
CANISTER AND FUEL TANK
PRESSURE RELIEF VALVE . . . . .
REMOVAL AND INSTALLATION. . . . . .
INSPECTION . . . . . . . . . . . . . . . . . . . . .
CATALYTIC CONVERTER . . . . . .
GENERAL DESCRIPTION
(CATALYTIC CONVERTER) . . . . . . . . .
REMOVAL AND INSTALLATION. . . . . .
SPECIFICATIONS . . . . . . . . . .
FASTENER TIGHTENING
SPECIFICATIONS . . . . . . . . . . . . .
SERVICE SPECIFICATIONS . . . . .
ENGINE CONTROL
TSB Revision
ENGINE AND EMISSION CONTROL
17-3
ENGINE CONTROL
GENERAL DESCRIPTION
M1171000100169
A cable-type accelerator mechanical sus-
pended-type pedal has been adopted.
ENGINE CONTROL SYSTEM DIAGNOSIS
INTRODUCTION TO ENGINE CONTROL SYSTEM DIAGNOSIS
M1171002000157
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
M1171002100251
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.
4. Verify that the malfunction is eliminated.
SYMPTOM CHART
M1171002200270
SYMPTOM PROCEDURES
INSPECTION PROCEDURE 1: Throttle Valve will not Fully Open or Close
DIAGNOSIS
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
, and then go to Step 4.
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.
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.
STEP 4. Check symptom.
Q: Does the throttle valve fully open and close?
YES :
This diagnosis is complete.
NO :
Return to Step 1.
SYMPTOM
INSPECTION PROCEDURE
REFERENCE PAGE
Throttle valve will not fully open or close
1
Accelerator pedal operation is not smooth
(over acceleration)
2
ENGINE CONTROL
TSB Revision
ENGINE AND EMISSION CONTROL
17-4
INSPECTION PROCEDURE 2: Accelerator Pedal Operation is not Smooth (Over Acceleration)
DIAGNOSIS
STEP 1. Check the accelerator pedal.
Q: Is the accelerator pedal loose?
YES :
Tighten, then go to Step 4.
NO :
Go to Step 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.
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.
STEP 4. Check symptom.
Q: Does the accelerator pedal work normally?
YES :
This diagnosis is complete.
NO :
Return to Step 1.
ON-VEHICLE SERVICE
ACCELERATOR CABLE CHECK AND
ADJUSTMENT
M1171000900295
1. Turn A/C and lamps OFF. Inspect and adjust at no load.
2. Warm engine until stabilized at idle.
3. Confirm idle speed is at standard value.
Standard value: 700
± 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.
(1) Loosen the adjusting bolt to release the cable.
(2) Move the plate until the inner cable play is at the standard
value, and then tighten the adjusting bolt.
(3) After adjusting, check that the throttle lever is touching
the stopper.
AC001444
ADJUSTING BOLTS
PLATE
AB
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