Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 467

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-160

STEP 41. Check the Park/Neutral position switch.

Check for continuity between terminals for each selector
position.

NOTE: For vehicles with sport mode, four positions (P, R, N, D)
are used.

Q: Is the switch operating properly?

YES : Go to Step 42.
NO : Replace the Park/Neutral position switch. Refer to

GROUP 23B, Transaxle

P.23B-11

.

STEP 42. Check connector B-41 at the Park/Neutral
position switch for damage.
Q: Is the connector in good condition?

YES : Go to Step 43.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

.

ITEMS

TERMINAL
CONNECTION OF
TESTER

SPECIFIED
CONDITION

P

3

−

8, 9

−

10

Less than 2 ohm.

R

7

−

8

N

4

−

8, 9

−

10

D

1

−

8

3

5

−

8

2

2

−

8

L

6

−

8

AC004672

DIPSTICK

PARK/NEUTRAL
POSITION (PNP)
SWITCH

AC

AC001846

P

R

N

D

3

2

L

AB

AC001844

CONNECTOR: B-41

DIPSTICK

AB

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-161

STEP 43. Check the switch output voltage at PCM
connector C-61 <2.4L Engine> or C-63 <3.0L Engine> by
backprobing.
(1) Do not disconnect connector C-61 <2.4L Engine> or C-63

<3.0L Engine>.

(2) Turn the ignition switch to "ON" position.
(3) Move the selector lever to "L" position.

(4) Measure the voltage between terminal 110 and ground by

backprobing.

•

Voltage should be battery positive voltage.

(5) Turn the ignition switch to "LOCK" (OFF) position.

Q: Is the voltage normal?

YES : Go to Step 12.
NO : Go to Step 44.

STEP 44. Check connectors C-61 <2.4L Engine> or C-63
<3.0L Engine> at PCM for damage.
Q: Are the connectors in good condition?

YES : Repair it because of the harness open circuit or short

circuit to ground between the Park/Neutral position
switch connector B-41 terminal 6 and PCM connector
C-61 <2.4L Engine> or C-63 <3.0L Engine> terminal
110.

NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

.

AC001657

CONNECTOR: C-61 <2.4L ENGINE> OR
C-63 <3.0L ENGINE>

PCM

AN

AC001946

C-61 <2.4L ENGINE> OR
C-63 <3.0L ENGINE>
CONNECTOR HARNESS
SIDE VIEW

AD

AC001657

CONNECTOR: C-61 <2.4L ENGINE> OR
C-63 <3.0L ENGINE>

PCM

AN

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-162

STEP 45. Check connectors C-63 at PCM and C-65 at shift
switch assembly for damage.
Q: Are the connectors in good condition?

YES : Repair it because of harness short circuit to ground

between shift switch assembly connector C-65
terminal 4 and PCM connector C-63 terminal 109.

NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

.

DTC 28: Park/Neutral Position Switch System (Short Circuit)

Park/Neutral Position Switch System Circuit
Refer to

P.23A-135

.

CIRCUIT OPERATION
Refer to

P.23A-135

.

DTC SET CONDITIONS
If the PCM detects more than one kind of park/
neutral position switch input signals for continuous
period of thirty seconds, it is judged that there is a
short circuit in the Park/Neutral position switch and
diagnostic trouble code number "28" is output.

TROUBLESHOOTING HINTS (The most likely

causes for this code to be set:)

•

Malfunction of the Park/Neutral position switch

•

Malfunction of the ignition switch

•

Damaged harness, connector

•

Malfunction of the PCM

DIAGNOSIS

Required Special Tool:
MB991502: Scan Tool (MUT-II)

AC001657

CONNECTOR: C-63

PCM

AO

AC001741

CONNECTOR: C-65

AL

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-163

STEP 1. Check the Park/Neutral position switch.

Check for continuity between terminals for each selector
position.

NOTE: For vehicles with sport mode, four positions (P, R, N, D)
are used.

Q: Is the switch operating properly?

YES : Go to Step 2.
NO : Replace the Park/Neutral position switch. Refer to

GROUP 23B, Transaxle

P.23B-11

.

STEP 2. Check connector B-41 at the Park/Neutral position
switch for damage.
Q: Is the connector in good condition?

YES : Go to Step 3.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

.

ITEMS

TERMINAL
CONNECTION OF
TESTER

SPECIFIED
CONDITION

P

3

−

8, 9

−

10

Less than 2 ohm.

R

7

−

8

N

4

−

8, 9

−

10

D

1

−

8

3

5

−

8

2

2

−

8

L

6

−

8

AC004672

DIPSTICK

PARK/NEUTRAL
POSITION (PNP)
SWITCH

AC

AC001846

P

R

N

D

3

2

L

AB

AC001844

CONNECTOR: B-41

DIPSTICK

AB