Mitsubishi Outlander XL. Manual — part 450

GROUP 17a

ENGINE CONTROL

CONTENTS

GENERAL INFORMATION. . .

17a-2

ENGINE CONTROL SYSTEM DIAGNOSIS
. . . . . . . ...

17a-2

INTRODUCTION. . . . ...

17a-2

TROUBLESHOOTING STRATEGY. ...

17a-2

SYMPTOM CHART. . . . ..

17a-2

SYMPTOM PROCEDURES. . . .

17a-3

Inspection Procedure 1: Throttle Valve
will not Fully Open or Close. .

17a-3

Inspection Procedure 2: Accelerator
Pedal Operation not Smooth (Over
Acceleration). . . . .

17a-4

SPECIAL TOOL. . . . ...

17a-6

ACCELERATOR PEDAL. . . ..

17a-7

REMOVAL AND INSTALLATION. ...

17a-7

17a-1

GENERAL INFORMATION

M11701000001USA0000010000

For the accelerator system, an electronic throttle
actuator control system is utilized, eliminating the
accelerator cable.

CONSTRUCTION DIAGRAM

ZC6014820002

Accelerator pedal assembly
[Built-in accelerator pedal
position sensor (APP sensor)]

ENGINE CONTROL SYSTEM DIAGNOSIS

INTRODUCTION

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

TROUBLESHOOTING STRATEGY

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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

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Symptom

Inspection procedure

Reference page

Throttle valve will not fully open or close

1

P.17a-3

Accelerator pedal operation not smooth (over
acceleration)

2

P.17a-4

17a-2

ENGINE CONTROL

GENERAL INFORMATION

SYMPTOM PROCEDURES

Inspection Procedure 1: Throttle Valve will not Fully Open or Close

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COMMENT
The throttle body or accelerator pedal position sensor
(APP sensor) is suspected.

TROUBLESHOOTING HINTS (The most likely
causes for this case:)

｠

Malfunction of the throttle body.

｠

Malfunction of the APP sensor.

｠

Malfunction of the engine control module (ECM).

DIAGNOSIS

Required Special Tools:

｠

MB991958: Scan Tool (M.U.T.-III Sub Assembly)

｠

MB991824: Vehicle Communication Interface (V.C.I.)

｠

MB991827: M.U.T.-III USB Cable

｠

MB991910: M.U.T.-III Main Harness A

STEP 1. Using scan tool MB991958, read the MFI system
diagnostic trouble code.

ZC501967

AC404789

ZC5019680000

MB991824

MB991827

MB991910

Data link

connector

To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991958.

(1)

Ensure that the ignition switch is at the "LOCK" (OFF)
position.

(2)

Start up the personal computer.

(3)

Connect special tool MB991827 to special tool MB991824
and the personal computer.

(4)

Connect special tool MB991910 to special tool MB991824.

(5)

Connect special tool MB991910 to the data link connector.

(6)

Turn the power switch of special tool MB991824 to the "ON"
position.

NOTE:

When special tool MB991824 is energized, special

tool MB991824 indicator light will be illuminated in a
green color.

(7)

Start the M.U.T.-III system on the personal computer.

(8)

Turn the ignition switch to the "ON" position.

(9)

Check for MFI system diagnostic trouble code (Refer to
GROUP 13Ab, Diagnostic Function - How to Read and Erase
Diagnostic Trouble Codes P.13Ab-8).

(10)

Turn the ignition switch to the "LOCK" (OFF) position, and
then remove scan tool MB991958 in the reverse order of
installation.

ENGINE CONTROL

17a-3

ENGINE CONTROL SYSTEM DIAGNOSIS

Q:Is any DTC set?

YES:

Repair MFI system (Refer to GROUP 13Ab, Diagnostic

Trouble Code Chart P.13Ab-44). Then go to Step 2.

NO:

Go to Step 2.

STEP 2. Retest the system.

Q:Does the throttle valve fully open and close?

YES:

The procedure is complete.

NO:

Return to Step 1.

Inspection Procedure 2: Accelerator Pedal Operation not Smooth (Over Acceleration)

M11701000025USA0000010000

COMMENT
The accelerator pedal, its installation condition or the
APP sensor is suspected.

TROUBLESHOOTING HINTS (The most likely
causes for this case:)

｠

Malfunction of the accelerator pedal.

｠

Incorrectly installed accelerator pedal.

｠

Malfunction of the APP sensor.

DIAGNOSIS

Required Special Tools:

｠

MB991958: Scan Tool (M.U.T.-III Sub Assembly)

｠

MB991824: V.C.I.

｠

MB991827: M.U.T.-III USB Cable

｠

MB991910: M.U.T.-III Main Harness A

STEP 1. Check if the accelerator pedal is installed correctly.

Q:Is the accelerator pedal installed correctly?

YES:

Go to Step 2.

NO:

Remove and reinstall the accelerator pedal (Refer

to P.17a-7). Then go to Step 3.

17a-4

ENGINE CONTROL

ENGINE CONTROL SYSTEM DIAGNOSIS