Mitsubishi Eclipse. Manual - part 839

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-365

STEP 4. Using scan tool MB991958, check data list item 67: 
Select Switch, item 68: Shift Switch (Up), item 69: Shift 
Switch (Down).

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) Check the following items in the data list.

a. item 67: Select Switch
b. item 68: Shift Switch (Up)

c. item 69: Shift Switch (Down)

NOTE: The switches above are displayed, depending on 
the selector lever condition as shown in the table.

(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.

STEP 5. Check the shift switch assembly.
Refer to 

P.23A-420

, Transaxle Control.

Q: Is the switch operating properly?

YES : Go to Step 6.
NO :  Replace the shift switch assembly. Refer to 

P.23A-418

, Transaxle Control.

SELECTOR LEVER 
OPERATION

DATA LIST ITEM

67

68

69

D range

OFF

OFF

OFF

Sport mode

ON

OFF

OFF

Upshift and hold the 
selector lever

ON

ON

OFF

Downshift and hold the 
selector lever

ON

OFF

ON

AC303127

AB

MB991911

16-PIN

MB991827

MB991824 

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-366

STEP 6. Measure the power supply voltage at shift switch 
assembly connector C-65.
(1) Disconnect connector C-65 and measure at the harness 

side.

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

(3) Measure the voltage between terminal 6 and ground.

• The voltage should measure battery positive voltage.

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

YES : Go to Step 4.
NO :  Go to Step 7.

AC001741

CONNECTOR: C-65

AS

C-65

1

3

4

5

2

6

AC203801AC

C-65 HARNESS 
CONNECTOR: 
COMPONENT SIDE

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-367

STEP 7. Check shift switch assembly connector C-65 and 
intermediate connector C-28 for looser, corroded or 
damaged terminals, or terminals pushed back in the 
connector.
Q: Are the connectors 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

.

AC001741

CONNECTOR: C-65

AS

C-65

AC106611AB

CONNECTOR: C-28

C-28

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-368

STEP 8. Check the harness for open circuit or short circuit 
to ground between shift switch assembly connector C-65 
terminal 6 and intermediate connector C-28 terminal 2.
Q: Is the harness wire in good condition?

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

AC001741

CONNECTOR: C-65

AS

C-65

AC106611AB

CONNECTOR: C-28

C-28