Mitsubishi Eclipse. Manual - part 835

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-349

STEP 7. Check auto-cruise control-ECU connector C-20 at 
for looser, 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

.

STEP 8. Check auto-cruise control-ECU connector C-20 
and inter mediate 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 9.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

.

AC001741

CONNECTOR: C-20

AU

C-20

AC001741

CONNECTOR: C-20

AU

C-20

AC106611AB

CONNECTOR: C-28

C-28

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-350

STEP 9. Check harness for short circuit to ground between 
PCM connector C-57 <2.4L Engine> or C-59 <3.0L Engine> 
terminal 75 and auto-cruise control-ECU connector C-20 
terminal 3.
Q: Is the harness wire in good condition?

YES : Go to Step 10.
NO :  Repair or replace the harness wire.

AC001657

CONNECTOR: C-57 <2.4L ENGINE> OR 
C-59 <3.0L ENGINE>

AZ

PCM

C-57 <2.4L ENGINE> OR C-59 <3.0L ENGINE>

AC001741

CONNECTOR: C-20

AU

C-20

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-351

STEP 10. Using scan tool MB991958, check data list item 
66: Overdrive Off Signal (Auto-cruise control-ECU Signal).

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) Start the engine and prepare to test drive the vehicle. 

(Operate the auto-cruise)

(3) Set scan tool MB991958 to data reading mode for item 66: 

Overdrive Off Signal (Auto-cruise control-ECU Signal).

• When driving at level road, the display should be "OFF."

• When driving at uphill road, the display should be "ON."

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?

YES : It can be assumed that this malfunction can be 

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-352

INSPECTION PROCEDURE 17: Vehicle Speed Signal System

AC102736AB

Vehicle Speed Signal System Circuit