Mitsubishi Galant 9G. Manual - part 532

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-206

STEP 7. Check the harness for an open or short circuit to 
ground between PCM connector B-21 terminal 65 and A/T 
control solenoid valve assembly connector B-108 terminal 
3.
Q: Is the harness wire in good condition?

YES : Replace the PCM.
NO :  Repair or replace the harness wire.

AC306248AC

B-21 
(B)

CONNECTOR: B-21

PCM

AIR
CLEANER

73

80

54

67

60

71 72

77 78 79

64

51

59

58

65

52

66

53

75

74

76

81 82

83

63

JAE

62

68

61

55

69

56

70

57

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-207

STEP 8. Measure the supply voltage at A/T control 
solenoid valve assembly connector B-108.
(1)  Disconnect solenoid valve assembly harness connector 

B-108.

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

(3) Measure the voltage between harness connector B-108 

terminal 9 and ground.

• The voltage should equal battery positive voltage.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage battery positive voltage?

YES : Go to Step 11.
NO :  Go to Step 9.

STEP 9. Check A/T control relay connector B-16X in the 
engine component relay box and 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 connectors and terminals in good condition?

YES : Go to Step 10.
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

AC210680

2

5

6

10

4

9

3

8

1

7

AB

B-108 HARNESS 
CONNECTOR: 
COMPONENT SIDE

AC306354

RELAY BOX

AB

CONNECTOR: B-16X

2

1

3

4

FRONT OF
VEHICLE

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-208

STEP 10. Check the harness for an open circuit or short 
circuit to ground between A/T control relay connector 
B-16X terminal 4 in the engine component relay box and 
A/T control solenoid valve assembly connector B-108 
terminal 9.
Q: Is the harness wire in good condition?

YES : Go to Step 11.
NO :  Repair or replace the harness wire.

AC306354

RELAY BOX

AB

CONNECTOR: B-16X

2

1

3

4

FRONT OF
VEHICLE

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-209

STEP 11. Check PCM connector B-21 and 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 connectors and terminals in good condition?

YES : Go to Step 12.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

.

AC306248AC

B-21 
(B)

CONNECTOR: B-21

PCM

AIR
CLEANER

73

80

54

67

60

71 72

77 78 79

64

51

59

58

65

52

66

53

75

74

76

81 82

83

63

JAE

62

68

61

55

69

56

70

57

AC306322

CONNECTOR: B-108

B-108 (GR)

AC

TRANSMISSION
RANGE SWITCH

2

7

1

8

3

9

4

6

10

5