Mitsubishi Galant (2004+). Manual - part 654

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-167

DTC SET CONDITIONS

Check Conditions, Judgement Criteria

• Transmission range switch: multiple signal. (30 

seconds)

.

OBD-II DRIVE CYCLE PATTERN
Start the engine, keep the vehicle stopped in "P," "R," 
"N," "D," "3," "2" and "L" ranges respectively for more 
than one minute, and turn "LOCK" (OFF) the ignition 
switch. Then restart the engine, and stop the vehicle 
in "P," "R," "N," "D," "3," "2" and "L" ranges respec-
tively for more than one minute.

.

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

• Malfunction of the transmission range switch cir-

cuit

• 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

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-168

STEP 1. Check the transmission range switch.

Measure the resistance between the terminals for each trans-
mission range as indicated in the table below.

NOTE: For vehicles with sport mode, four positions (P, R, N, D) 
are used.
Q: Does the resistance measure less than 2 ohms for each 

selector position?
YES : Go to Step 2.
NO :  Replace the transmission range switch. Refer to 

GROUP 23B, Transaxle 

P.23B-10

.

TRANS
MISSION 
RANGE

TERMINAL 
CONNECTION OF 
TESTER

SPECIFIED 
CONDITION

P

3 

− 8, 9 − 10

Less than 2 ohms.

R

7 

− 8

N

4 

− 8, 9 − 10

D

1 

− 8

3

5 

− 8

2

2 

− 8

L

6 

− 8

AC305881

AC305532

AC305679

<F4A4B>

<F4A5A>

AC

TRANSMISSION
RANGE SWITCH

TRANSMISSION
RANGE SWITCH

AC304078

P

R

N

D

<F4A4B>

AC

3

2

L

AC210182AC

P

R

N

D

<F4A5A>

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-169

STEP 2. Check transmission range switch connector B-110 
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 3.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

.

STEP 3. Check PCM connector B-21 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

.

AC210068

CONNECTOR: B-110

B-110 (B)

AE

TRANSMISSION
RANGE SWITCH

1

7

2

8

3

5

9

4

10

6

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

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-170

STEP 4. Measure the transmission range switch output 
voltage at PCM connector B-21 by using check harness 
special tool MB991923. ("P" position)

(1) Disconnect all the connectors from the PCM.

(2) Connect special tool MB991923 (check harness) between 

the PCM and the body-side harness connector.

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

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

AC209793AG

SPECIAL TOOL 33-PIN CONNECTOR
(PCM CONNECTOR B-21)

B-21
(GR)

55

56

54 53 52 51

57

62 61 60 59 58

63

69 68 67 66 65 64

70

75 74 73 72 71

76

82 81 80 79 78 77

83

PCM

MB991923

BODY SIDE
HARNESS