Mitsubishi Galant 9G. Manual - part 496

 

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Mitsubishi Galant 9G. Manual - part 496

 

 

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-62

STEP 2. Measure the sensor output voltage at the A/T 
control solenoid valve assembly connector B-108 by 
backprobing.
(1) Do not disconnect connector B-108.
(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal 1 and ground by 

backprobing.

• When transmission fluid temperature is 20°C (68°F), 

voltage should measure between 3.8 and 4.0 volts.

• When transmission fluid temperature is 40°C (104°F), 

voltage should measure between 3.2 and 3.4 volts.

• When transmission fluid temperature is 80°C (176°F), 

voltage should measure between 1.7 and 1.9 volts.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage within the specified range?

YES : Go to Step 6.
NO :  Go to Step 3.

STEP 3. Check A/T control solenoid valve assembly 
connector B-108 for loose, corroded or damaged 
terminals, or terminals pushed back in the connector.
Q: Are the connector and terminals in good condition?

YES : Go to Step 4.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

.

AC306322

CONNECTOR: B-108

B-108 (GR)

AC

TRANSMISSION
RANGE SWITCH

2

7

1

8

3

9

4

6

10

5

5

2

1

7

3

8

4

9

6

10

AC200996

B-108  HARNESS
CONNECTOR: 
HARNESS SIDE

AG

AC306322

CONNECTOR: B-108

B-108 (GR)

AC

TRANSMISSION
RANGE SWITCH

2

7

1

8

3

9

4

6

10

5

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-63

STEP 4. Check the sensor output voltage at A/T control 
solenoid valve assembly connector B-108.
(1) Disconnect connector B-108 and measure at the harness 

side.

(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal 1 and ground.

• The voltage should measure between 4.5 and 4.9 volts.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 4.5 and 4.9 volts?

YES : Go to Step 5.
NO :  Go to Step 7.

AC306322

CONNECTOR: B-108

B-108 (GR)

AC

TRANSMISSION
RANGE SWITCH

2

7

1

8

3

9

4

6

10

5

2

5

6

10

4

9

3

8

1

7

AC201006AE

B-108 HARNESS
CONNECTOR: 
COMPONENT SIDE

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-64

STEP 5. Check the transmission fluid temperature sensor 
at A/T control solenoid valve assembly connector B-108.
(1) Disconnect connector B-108 and measure at the sensor 

side.

(2) Measure the resistance between terminal 1 and 2.

• When transmission fluid temperature is 0°C (32°F), 

resistance should be between 16.7 and 20.5 k

Ω.

• When transmission fluid temperature is 20°C (68°F), 

resistance should be between 7.3 and 8.9 k

Ω.

• When transmission fluid temperature is 40°C (104°F), 

resistance should be between 3.4 and 4.2 k

Ω.

• When transmission fluid temperature is 60°C (140°F), 

resistance should be between 1.9 and 2.2 k

Ω.

• When transmission fluid temperature is 80°C (176°F), 

resistance should be between 1.0 and 1.2 k

Ω.

• When transmission fluid temperature is 100°C (212°F), 

resistance should be between 0.57 and 0.69 k

Ω.

Q: Is the measured resistance within the specified range?

YES : Go to Step 6.
NO :  Replace the transmission fluid temperature sensor. 

Refer to GROUP 23B, Transaxle 

P.23B-10

.

AC306322

CONNECTOR: B-108

B-108 (GR)

AC

TRANSMISSION
RANGE SWITCH

2

7

1

8

3

9

4

6

10

5

2

7

1

8

3

9

4

6

10

5

AC210626AB

B-108 HARNESS 
CONNECTOR: 
TRANSMISSION FLUID 
TEMPERATURE 
SENSOR SIDE 

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-65

STEP 6. Using scan tool MB991958, check data list item 15: 
Transmission Fluid Temperature 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 the data reading mode.

• Item 15: Transmission Fluid Temperature Sensor.

• When the engine is cool: Almost equal to the ambi-

ent temperature (atmospheric temperature)
NOTE: Set scan tool MB991958 to the data reading 
mode for item number 13, Intake Air Temperature 
(IAT) Sensor and note the temperature measure-
ment. When the engine is cool, the temperature 
should be almost equal to the ambient temperature 
(atmospheric temperature), and the IAT sensor mea-
surement should be approximately the same as the 
Transmission Fluid Temperature Sensor.

• When the engine is warm: 70 − 80°C (158 − 176°F).

(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.00-14

.

NO :  Replace the PCM.

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

 

 

 

 

 

 

 

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