Mitsubishi Evolution X. Manual - part 209

ENGINE CONTROL

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ENGINE AND EMISSION CONTROL

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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)

.

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.17-8

). Then go to Step 3.

ENGINE CONTROL

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ENGINE AND EMISSION CONTROL

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STEP 2. Using scan tool MB991958, read the MFI system 
DTC.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting 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 DTC. (Refer to GROUP 13A, MFI 

Diagnosis, Diagnostic Function 

− How to Read and Erase 

Diagnostic Trouble Codes 

P.13A-9

).

(10)Turn the ignition switch to the "LOCK" (OFF) position, and 

then remove scan tool MB991958 in the reverse order of 
installation.

Q: Is any DTC set?

YES : Repair MFI system (Refer to GROUP 13A, MFI 

Diagnosis 

− Diagnostic Trouble Code Chart 

P.13A-44

). Then go to Step 3.

NO :  Go to Step 3.

STEP 3. Retest the system.
Q: Does the accelerator pedal work normally?

YES : The procedure is complete.
NO :  Return to Step 1.

ENGINE CONTROL

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ENGINE AND EMISSION CONTROL

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SPECIAL TOOL

M1171000600142

Tool

Tool number and name Supersession

Application

MB991910

MB991826

MB991958

MB991911

MB991914

MB991824

MB991827

MB991825

Do not use

a

b

c

d

e

f

g

Do not use

MB991958

a: MB991824
b: MB991827
c: MB991910
d: MB991911
e: MB991914
f: MB991825
g: MB991826

Scan tool (M.U.T.-III sub 
assembly)

a: Vehicle 

communication 
interface (V. C. I.) 

b: M.U.T.-III USB cable
c: M.U.T.-III main 

harness A (Vehicles 
with CAN 
communication 
system)

d: M.U.T.-III main 

harness B (Vehicles 
without CAN 
communication 
system)

e: M.U.T.-III main 

harness C (for 
Daimler Chrysler 
models only)

f: M.U.T.-III 

measurement adapter

g: M.U.T.-III trigger 

harness

MB991824-KIT
NOTE: g: MB991826 
M.U.T.-III Trigger 
Harness is not 
necessary when 
pushing V.C.I. 
ENTER key.

For vehicles with CAN 
communication, use 
M.U.T.-III main harness A to 
send simulated vehicle 
speed. If you connect 
M.U.T.-III main harness B 
instead, the CAN 
communication does not 
function correctly.
Checking diagnostic trouble 
code (DTC)

CAUTION

ENGINE CONTROL

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ENGINE AND EMISSION CONTROL

17-8

ACCELERATOR PEDAL

REMOVAL AND INSTALLATION

M1171003000730

Pre-removal and post-installation operation
• Instrument Panel Cover Lower Removal and Installation 

(Refer to GROUP 52A, Instrument Lower Panel 

P.52A-8

). 

<MR>

AC709024

1

2

15 ± 3 N·m
11 ± 2 ft-lb

AB

Removal steps 

1.

Accelerator pedal position sensor 
connector

2.

Accelerator pedal assembly