Mitsubishi Galant 9G. Manual — part 562

AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

23A-326

STEP 12. Check the shift switch assembly.
Refer to

P.23A-384

, Transaxle Control.

Q: Is the switch operating properly?

YES : Go to Step 13.
NO : Replace the shift switch assembly. Refer to

P.23A-382

, Transaxle Control.

STEP 13. Measure the switch output voltage at PCM
connector B-20 by using check harness special tool
MB991923.
(1) Disconnect all the connectors from the PCM.

AC306248AH

CONNECTOR: B-20

PCM

AIR
CLEANER

JAE

41

37

32

40

39

23

21 22

35

31

30

26

36

27

43

42

25

24

38

34

29

33

28

B-20

AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

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(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.
(4) Move the selector lever to the sport mode.

(5) Measure the voltage between terminal 39 and ground.

• The voltage should measure battery positive voltage.

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

YES : Go to Step 16.
NO : Go to Step 14.

AC209793AK

SPECIAL TOOL 23-PIN CONNECTOR
WITHOUT RED TAPE
(PCM CONNECTOR B-20)

B-20
(GR)

25

21

24 23 22

29 28 27 26

34 33 32 31 30

38 37 36 35

43 42 41 40 39

PCM

MB991923

BODY SIDE
HARNESS

AC210376

24

33

37

42

43

25

34

38

29

40

41

39

21

30

22

23

27

36

32

28

31

35

26

JAE

AC

B-20 HARNESS
CONNECTOR:
COMPONENT SIDE

AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

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STEP 14. Check PCM connector B-20 and shift switch
assembly connector C-20 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 15.
NO : Repair or replace the damaged components. Refer to

GROUP 00E, Harness Connector Inspection

P.00E-2

.

AC306248AH

CONNECTOR: B-20

PCM

AIR
CLEANER

JAE

41

37

32

40

39

23

21 22

35

31

30

26

36

27

43

42

25

24

38

34

29

33

28

B-20

AC306349AB

CONNECTOR: C-20

4

3

1

5 6

2

AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

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STEP 15. Check the harness for open circuit or short
circuit to ground between PCM connector B-20 terminal 39
and shift switch assembly connector C-20 terminal 3.
Q: Is the harness wire in good condition?

YES : Go to Step 4.
NO : Repair or replace the harness wire.

AC306248AH

CONNECTOR: B-20

PCM

AIR
CLEANER

JAE

41

37

32

40

39

23

21 22

35

31

30

26

36

27

43

42

25

24

38

34

29

33

28

B-20

AC306349AB

CONNECTOR: C-20

4

3

1

5 6

2