Mitsubishi Galant 9G. Manual — part 446

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.

AC305917

ACCELERATOR PEDAL
ASSEMBLY
[BUILT-IN ACCELERATOR PEDAL
POSITION (APP) SENSOR]

STOPPER

ENGINE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-4

SYMPTOM CHART

M1171002200292

SYMPTOM PROCEDURES

INSPECTION PROCEDURE 1: Throttle Valve Will Not Fully Open or Close

COMMENT

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

TROUBLESHOOTING HINTS (THE MOST
LIKELY CAUSES FOR THIS CASE:)

• Malfunction of the throttle body.

• Malfunction of the accelerator pedal position

(APP) sensor.

• Malfunction of the PCM.

SYMPTOM

INSPECTION PROCEDURE

REFERENCE PAGE

Throttle Valve Will Not Fully Open or Close

P.17-4

Accelerator Pedal Operation Not Smooth (Over
Acceleration)

P.17-6

ENGINE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-5

DIAGNOSIS

Required Special Tools:

• MB991958: Scan Tool (MUT-III Sub Assembly)

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

• MB991827: MUT-III USB Cable

• MB991910: MUT-III Main Harness A

STEP 1. Using scan tool MB991958, read the diagnostic
trouble code (DTC).

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 MUT-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 13A, MFI Diagnosis

− Diagnostic Function − How

to Read and Erase Diagnostic Trouble Code

P.13A-6

)

<2.4L engine> or (Refer to GROUP 13B, MFI Diagnosis

−

Diagnostic Function

− How to Read and Erase Diagnostic

Trouble Code

P.13B-6

) <3.8L engine>.

(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-33

) <2.4L engine> or (Refer to GROUP 13B,

MFI Diagnosis

− Diagnostic Trouble Code Chart

P.13B-34

) <3.8L engine>. 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.

AC305412

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

Была ли эта страница вам полезна?

Да!Нет

3 посетителя считают эту страницу полезной.

Mitsubishi Galant 9G. Manual — part 446

Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.