Mitsubishi Eclipse. Manual - part 751

GENERAL DESCRIPTION

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AUTOMATIC TRANSAXLE

23A-13

<3.0L ENGINE (VEHICLES WITH VARIABLE INDUCTION SYSTEM) > UPSHIFT PATTERN

NOTE: Within 2 -to- 3 and 3 -to- 4 movement ranges, the PCM adjusts shift points according to the driving
conditions by memorizing the accelerator pedal stroke and braking timing.

<3.0L ENGINE (VEHICLES WITH VARIABLE INDUCTION SYSTEM) > DOWNSHIFT PATTERN

AC106504

THROTTLE OPENING (%)

100

0 (0)

50 (31)

100 (62)

150 (93)

VEHICLE SPEED [km/h (mph)]

1,000

2,000

3,000

4,000

5,000

6,000

7,000

OUTPUT SHAFT SPEED (r/min)

THICK LINE: STANDARD SHIFT PATTERN

→ 3

MOVEMENT
RANGE

→4

MOVEMENT
RANGE

200 (124)

AC106505

THROTTLE OPENING (%)

100

0 (0)

50 (31)

100 (62)

150 (93)

VEHICLE SPEED [km/h (mph)]

1,000

2,000

3,000

4,000

5,000

6,000

7,000

OUTPUT SHAFT SPEED (r/min)

200 (124)

(SPORT MODE)

AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

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AUTOMATIC TRANSAXLE DIAGNOSIS

DIAGNOSTIC TROUBLESHOOTING FLOW

M1231013500320

INTRODUCTION TO A/T DIAGNOSIS

M1231012300204

The automatic transaxle can exhibit any of the follow-
ing symptoms: noise or vibration is generated, trans-
mission fluid leaks, the vehicle does not move
forward or backward. The cases of these symptoms
could come from: Incorrect mounting, the transmis-
sion fluid may be low, or a component of the
transaxle may be faulty.

The following items are suspected as causes for the
INVECS-II troubles: malfunctions of the PCM, the
sensors, the switches, the harness or connectors.

Gather information from customer.

Check the automatic transmission
fluid.

Verify complaint.

Replace or replenish the automatic
transmission fluid.

Communication with the scan tool
(MUT-II) not possible in Symptom
Chart.

Read the diagnostic trouble code.

Erase the diagnostic trouble code.

Check symptom.

Perform the repair.

Road test

Recheck diagnostic trouble codes
which were read before road test.

To DIAGNOSTIC TROUBLE CODE
CHART

To SYMPTOM CHART

Search for cause.

Repair

Confirmation test (road test)

INTERMITTENT MALFUNCTIONS
(Refer to GROUP 00, How to Use
Troubleshooting/Inspection
Service Points.)

Completed

Communication with the scan
tool (MUT-II) not possible

Diagnostic trouble code
displayed.

No diagnostic trouble code
displayed.

Abnormality exists (no diagnostic
trouble code)

Abnormality exists
(diagnostic trouble
code present)

No abnormality

No diagnostic trouble code
displayed.

Diagnostic trouble code
displayed.

Found

Not found

AC102288

Communication with the scan
tool (MUT-III) not possible

Communication with the scan tool
(MUT-III) not possible in Symptom
Chart.

AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

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A/T DIAGNOSTIC TROUBLESHOOTING STRATEGY

M1231007600168

Use these steps to plan your diagnostic strategy. If
you follow them carefully, you will find most A/T
faults.
1. Gather as much information as possible about the

complaint from the customer.

2. Verify that the condition described by the

customer exists.

3. Check the vehicle for any A/T Diagnostic Trouble

Code (DTC).

4. If you cannot verify the condition and there are no

DTC, the malfunction is intermittent. For
information on how to cope with intermittent
malfunctions, refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points

− How

to Cope with Intermittent Malfunction

P.00-6

5. If you can verify the condition but there are no

DTC, or the system cannot communicate with the
scan tool, refer to Symptom Chart

P.23A-42

6. If there is a DTC, record the number of the code,

then erase the code from memory using the scan
tool.

7. Reconfirm the symptom using the Road Test.
8. If DTC is set again, go to Inspection Chart for

Diagnostic Trouble Codes.

9. If DTC is not set again, the malfunction is

intermittent. For information on how to cope with
intermittent malfunctions, refer to GROUP 00,
How to Use Troubleshooting/Inspection Service
Points

− How to Cope with Intermittent

Malfunction

P.00-6

10.After repairs are completed, conduct a Road Test

duplicating the complaint set conditions to confirm
the malfunction has been eliminated.

DIAGNOSTIC FUNCTION

M1231022500038

CHECK "N" RANGE LIGHT <VEHICLES WITH
SPORT MODE>

The "N" range light flashes once per second if there is an
abnormality in any of the items in the table below which are
related to the A/T system. Check for diagnostic trouble codes if
the "N" range light is flashing once per second.

"N" range light flashing items

• Input shaft speed sensor

• Output shaft speed sensor

• Each solenoid valve

• Gear incorrect ratio

• A/T control relay system

CAUTION

If the "N" range light is flashing twice per second, it means
that the transmission fluid temperature is too high. Stop
the vehicle in a safe place and wait until the "N" range light
switches off.

ON-BOARD DIAGNOSTICS

The powertrain control module (PCM) monitors its
input/output signals (some signals all the time and
others under specified conditions). When an irregular
signal is initially monitored, the PCM decides that a
malfunction has occurred and records the occur-
rence as a diagnostic trouble code. There are 24
<Vehicles without sport mode> or 25 <Vehicles with
sport mode> diagnostic items. The diagnostic results
can be read with scan tool. Diagnostic trouble codes
are kept in memory by direct battery feed. The codes

are retained in memory even if the ignition switch is
in the "LOCK" (OFF) position. DTCs are erased after
the battery terminals and the PCM connector are dis-
connected. In addition, the diagnostic trouble code
can also be erased by scan tool.
NOTE: If a sensor is disconnected when the ignition
switch is in the "ON" position, a diagnostic trouble
code is stored in memory. In this case, erase the
DTC using scan tool.
The 24 <Vehicles without sport mode> or 25 <Vehi-
cles with sport mode> diagnostic items are displayed
in numeric order.

AC001816

AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

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HOW TO CONNECT THE SCAN TOOL (MUT-III)

Required Special Tools:
MB991958: Scan Tool (MUT-III Sub Assembly)

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

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B

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 MB991911 to special tool MB991824.
5. Connect special tool MB991911 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.
NOTE: Disconnecting scan tool MB991958 is the reverse of the
connecting sequence, making sure that the ignition switch is at
the "LOCK" (OFF) position.

HOW TO READ AND ERASE DIAGNOSTIC
TROUBLE CODES

Required Special Tool:
MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B

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.

NOTE: If the battery voltage is low, diagnostic trouble codes
will not be set. Check the battery if scan tool MB991958
does not display.
NOTE: If the battery is disconnected or if the powertrain
control module connector is disconnected, the diagnostic
trouble codes will be erased. Do not disconnect the battery
or powertrain control module before the diagnostic trouble
codes have been read.

AC303127

MB991911

16-PIN

MB991827

MB991824

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