Mitsubishi Galant (2004+). Manual - part 615

GENERAL DESCRIPTION

TSB Revision

AUTOMATIC TRANSAXLE

23A-11

UPSHIFT PATTERN <F4A5A>

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.

.

DOWNSHIFT PATTERN <F4A5A>

AC306570

THICK LINE: STANDARD SHIFT PATTERN

2     3
MOVEMENT
RANGE

3     4
MOVEMENT
RANGE

50

0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

100

0.5

1.0

2.0

3.0

4.0

4.5

0 (0)

50 (31)

100 (62)

150 (93)

200 (124)

THROTTLE
OPENING 
VOLTAGE (V)

THROTTLE
OPENING (%)

VEHICLE SPEED km/h (mph)

OUTPUT SHAFT SPEED r/min

AC

1

2

2

3

3

4

AC306571

50

0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

100

0.5

1.0

2.0

3.0

4.0

4.5

0 (0)

50 (31)

100 (62)

150 (93)

200 (124)

THROTTLE
OPENING 
VOLTAGE (V)

THROTTLE
OPENING (%)

VEHICLE SPEED km/h (mph)

OUTPUT SHAFT SPEED r/min

AB

1

2

1

2 (SPORT MODE)

2

3

2

3

3

4

 (SPORT MODE)

3

4

 (SPORT MODE)

GENERAL DESCRIPTION

TSB Revision

AUTOMATIC TRANSAXLE

23A-12

TORQE CONVERTER CLUTCH CONTROL

.

4TH GEAR RANGE <F4A4B>

.

3RD GEAR RANGE <4A4B>

.

AC306494

50

0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

100

0.5

1.0

2.0

3.0

4.0

4.5

0 (0)

50 (31)

100 (62)

150 (93)

THROTTLE
OPENING 
VOLTAGE (V)

THROTTLE
OPENING (%)

VEHICLE SPEED km/h (mph)

OUTPUT SHAFT SPEED r/min

AB

LOCK-UP

DISENGAGED

PARTIAL
LOCK-UP
ZONE

AC306493

50

0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

100

0.5

1.0

2.0

3.0

4.0

4.5

0 (0)

50 (31)

100 (62)

150 (93)

THROTTLE
OPENING 
VOLTAGE (V)

THROTTLE
OPENING (%)

VEHICLE SPEED km/h (mph)

OUTPUT SHAFT SPEED r/min

AB

LOCK-UP

DISENGAGED

PARTIAL
LOCK-UP
ZONE

GENERAL DESCRIPTION

TSB Revision

AUTOMATIC TRANSAXLE

23A-13

4TH GEAR RANGE <F4A5A>

.

3RD GEAR RANGE <4A5A>

AC306573

50

0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

100

0.5

1.0

2.0

3.0

4.0

4.5

0 (0)

50 (31)

100 (62)

150 (93)

THROTTLE
OPENING 
VOLTAGE (V)

THROTTLE
OPENING (%)

VEHICLE SPEED km/h (mph)

OUTPUT SHAFT SPEED r/min

AB

LOCK-UP

DISENGAGED

PARTIAL
LOCK-UP
ZONE

DECELERATION
LOCK-UP ZONE

200 (124)

AC306572

50

0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

100

0.5

1.0

2.0

3.0

4.0

4.5

0 (0)

50 (31)

100 (62)

150 (93)

THROTTLE
OPENING 
VOLTAGE (V)

THROTTLE
OPENING (%)

VEHICLE SPEED km/h (mph)

OUTPUT SHAFT SPEED r/min

AB

LOCK-UP

DISENGAGED

PARTIAL
LOCK-UP
ZONE

200 (124)

DECELERATION
LOCK-UP ZONE

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-14

AUTOMATIC TRANSAXLE DIAGNOSIS

DIAGNOSTIC TROUBLESHOOTING FLOW

M1231013500353

INTRODUCTION TO A/T DIAGNOSIS

M1231012300226

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 causes 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: malfunction of the PCM, the 
sensors, the switches, the harness or connectors.

 

Gather information from customer.

Check the  transmission fluid.

Verify complaint.

Replace or replenish the
transmission fluid.

Communication with the scan tool
MB991958 (MUT-III sub assembly)
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

NG

OK

Communication with the scan tool
MB991958 (MUT-III sub assembly)
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

OK

OK

NG

AC210189

NG

AB