Mitsubishi Galant (2004+). Manual - part 630

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-71

AC306223

A-13 (GR)

AB

CONNECTOR: A-13

1

4

7

8

2 3

5

13

14

17

15

12

16

11

10

9

6

AC306248AE

B-22 
(B)

CONNECTOR: B-22

PCM

AIR
CLEANER

JAE

94

98

107

103

112

91

100

109

101102

106

110

105

111

97

92

96

93

104

113

108

95

99

AC305354

TRANSMISSION
RANGE SWITCH

B-109 (GR)

AC   

CONNECTOR: B-109

1

3

2

AC305231

CONNECTOR: C-01

AS

33

22

11

28

17

16

15

14

13

12

25

2324

2627

3

1 2

4 5

21

20

19

18

29 30

32

31

7

6

8

10

9

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-72

.

CIRCUIT OPERATION

• The input shaft speed sensor generates 0 ⇔ 5 

volts pulse signal when the input shaft rotates. 
The pulse signal frequency increases with a rise 
in input shaft speed.

• The input shaft speed sensor is connected to the 

PCM (terminals 111 and 113) via the input shaft 
speed sensor connector (terminals 1 and 2).

• The PCM detects the input shaft speed by the 

signal input to terminal 111.

• The input shaft speed sensor generates the pulse 

signal as the teeth of the underdrive clutch 
retainer pass the magnetic tip of the sensor.

.

DESCRIPTIONS OF MONITOR METHODS

• If there is no detection pulse from input shaft 

speed sensor (turbine rotation) even during driv-
ing test at more than specified speed, PCM 
judges that input shaft speed sensor has a fail-
ure.

.

MONITOR EXECUTION

• Continuous

.

MONITOR EXECUTION CONDITIONS (Other 
monitor and Sensor)

Other Monitor (There is no temporary DTC stored 

in memory for the item monitored below)

• DTC 23 (P0720): Output shaft speed sensor mal-

function

Sensor (The sensor below is determined to be 

normal)

• Output shaft speed sensor

.

AC207134

C-214

C-215

CONNECTORS: C-214, 215

AO

1

3 4

2

6

5

C-214

C-215

6

1

7

2

9

8

10

3

5

12

11

4

1314

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-73

LOGIC FLOW CHARTS (Monitor Sequence)

.

DTC SET CONDITIONS

Check Conditions

• Transmission range switch position: D, 3, 2 or L.

• Output speed: 1,000 r/min or more.

• Transmission fluid temperature sensor voltage: 

4.5 volts or less.

Judgement Criteria

• Input shaft speed sensor signal: no signal 

change. (4 seconds)

• If DTC 22 (P0715) is set consecutively four times, 

the transaxle is locked into 3rd gear or 2nd gear 
as a fail-safe measure, and the "N" range light 
flashes once per second.

.

OBD-II DRIVE CYCLE PATTERN
Start the engine, shift to 3rd gear or higher, and drive 
at 40 km/h (25 mph) or more for 10 seconds.

.

AC205224

N

E

 : 

Engine speed

START

Yes

No

Transmission fluid 
temperature sensor 
voltage < 4.5 V

Transmission range 
switch position is in 
D, 3, 2 or L range

Shift stage is 1st or 2nd
and N

E

 < 2,600 r/min

N

OPG-B

 > 1,000 r/min

Yes

No

Yes

No

Yes

No

Pulses of input shaft speed 
sensor are not inputted

Continuous failure for 4 secs.

Good

Malfunction

END

Yes

No

Yes

No

N

OPG-B 

: Output speed

            (output shaft speed sensor)

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-74

TROUBLESHOOTING HINTS (The most likely 
causes for this code to be set are:)

• Malfunction of the input shaft speed sensor

• Malfunction of the underdrive clutch retainer

• Damaged harness or connector

• Malfunction of the PCM

DIAGNOSIS

Required Special Tool:

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

• MB991824: V.C.I.

• MB991827: MUT-III USB Cable

• MB991910: MUT-III Main Harness A

STEP 1. Using scan tool MB991958, check data list item 22: 
Input Shaft Speed Sensor.

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) Connect scan tool MB991958 to the data link connector.
(2) Start the engine.

(3) Set scan tool MB991958 to data reading mode.

• Item 22: Input Shaft Speed Sensor.

• When driving at constant speed of 50 km/h (31 

mph), the display should be "1,400 

− 1,700 r/min" 

(Gear range: 3rd gear).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?

YES : It can be assumed that this malfunction is intermittent. 

Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

− How to 

Cope with Intermittent Malfunction 

P.00-6

.

NO :  Go to Step 2.

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827