Mitsubishi Galant 9G. Manual — part 531

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-202

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 actuator test
item 02: Underdrive Solenoid Valve.

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) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to the actuator test mode.

• Item 02: Underdrive Solenoid Valve.

• An audible clicking or buzzing should be heard when

the underdrive solenoid valve is energized.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the solenoid valve 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 Malfunctions

P.00-14

.

NO : Go to Step 2.

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

23A-203

STEP 2. Using scan tool MB991958, read the A/T
diagnostic trouble code.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Check for A/T diagnostic trouble code.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC 54 set? (DTC 54 may be set along with multiple

DTCs).
YES :
Refer to

P.23A-267

DTC 54: A/T Control Relay

System.

NO : Go to Step 3.

STEP 3. Using scan tool MB991958, read the A/T
diagnostic trouble code.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Check for A/T diagnostic trouble code.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Are DTC 33 and DTC 34 set? (Multiple DTCs may be set).

YES : Go to Step 8.
NO : Go to Step 4.

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

23A-204

STEP 4. Measure the underdrive solenoid valve resistance
at A/T control solenoid valve assembly connector B-108.
(1) Disconnect connector B-108 and measure at the solenoid

valve side.

(2) Measure the resistance between solenoid valve assembly

connector B-108 terminals 3 and 9.

Resistance value: 2.7

3.4 [at 20°C (68°F)]

Q: Is the measured resistance 2.7

3.4 [at 20°C (68°F)]?

YES : Go to Step 6.
NO : Go to Step 5.

STEP 5. Measure the solenoid valve resistance at the
underdrive solenoid valve assembly inside the transaxle.
(1) Disconnect connector B-108-1 and measure at the solenoid

valve side.

(2) Measure the resistance between Underdrive solenoid valve

terminals 1 and 2.

Resistance value: 2.7

3.4 [at 20°C (68°F)]

Q: Is the measured resistance 2.7

3.4 [at 20°C (68°F)?

YES : Replace the harness wire between A/T control

solenoid valve assembly connector B-108 and the
solenoid valves.

NO : Replace the Underdrive solenoid valve. Refer to

GROUP 23B, Valve Body

P.23B-80

.

AC306322

CONNECTOR: B-108

B-108 (GR)

AC

TRANSMISSION
RANGE SWITCH

2

7

1

8

3

9

4

6

10

5

AC210677

2

7

1

8

3

9

4

6

10

5

AB

B-108 HARNESS CONNECTOR:
A/T CONTROL SOLENOID VALVE
ASSEMBLY SIDE

AC002219

CONNECTOR: B-108-1

BX

B-108-1

VALVE BODY
ASSEMBLY

2

1

AC201141

B-108-1 HARNESS CONNECTOR:
UNDERDRIVE
SOLENOID VALVE SIDE

BA

AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

23A-205

STEP 6. 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 7.
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

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Текст

Политика конфиденциальности