Mitsubishi Eclipse. Manual - part 789

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-165

STEP 5. Using scan tool MB991958, check data list item 61: 
Transmission Range Switch.

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 "ON" position.
(3) Set scan tool MB991958 to data reading mode for item 61: 

Transmission Range Switch.

• Move the selector lever to "P," "R," "N," "D," "3," "2," "L" 

and sport mode positions and confirm that the selected 
selector lever positions match the positions shown on 
the scan tool MB991958. (Vehicles with sport mode is 
indicated as "D" on the scan tool).

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

P.00-6

.

NO :  Replace the PCM.

AC303127

AB

MB991911

16-PIN

MB991827

MB991824 

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-166

STEP 6. Check the transmission range switch.
Measure the resistance between the terminals for each selec-
tor position 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 7.
NO :  Replace the transmission range switch. Refer to 

GROUP 23B, Transaxle 

P.23B-10

.

STEP 7. Check transmission range switch connector B-41 
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 8.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

.

SELECTOR 
POSITION

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

AC004672

DIPSTICK

TRANSMISSION
RANGE SWITCH

AK

AC005865

P

R

N

D

3

2

L

AB

AC001844

CONNECTOR: B-41

DIPSTICK

AK

B-41

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-167

STEP 8. Measure the transmission range 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 the "ON" position.
(3) Move the selector lever to the "P" position.

(4) Measure the voltage between terminal 101 and ground by 

backprobing.

• The voltage should measure battery positive voltage.

(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Does the voltage measure battery positive voltage?

YES : Go to Step 13.
NO :  Go to Step 9.

STEP 9. Check PCM connector C-61 <2.4L Engine> or C-63 
<3.0L Engine> 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 10.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

.

AC001657

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

PCM

BC

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

AC001903AO

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

HARNESS CONNECTOR:
HARNESS SIDE

AC001657

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

PCM

BC

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

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-168

STEP 10. Check harness for open circuit or short circuit to 
ground between transmission range switch connector 
B-41 terminal 3 and PCM connector C-61 <2.4L Engine> or 
C-63 <3.0L Engine> terminal 101.
Q: Is the harness wire in good condition?

YES <Vehicles without sport mode> : Go to Step 5.
YES <Vehicles with sport mode> : Go to Step 11.
NO :  Repair or replace the harness wire.

STEP 11. Check intermediate connector C-27 and 
combination meter connector C-43 for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector. <Vehicles with sport mode>
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

.

AC001844

CONNECTOR: B-41

DIPSTICK

AK

B-41

AC001657

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

PCM

BC

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

AC001741

CONNECTOR: C-27

AR

C-27

AC001729AW

CONNECTOR: C-43

C-43