Mitsubishi Eclipse. Manual - part 822

 

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Mitsubishi Eclipse. Manual - part 822

 

 

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-297

STEP 8. Check the harness for open circuit, short circuit to 
ground and damage between combination meter 
connector C-43 terminal 9 and PCM connector C-61 <2.4L 
Engine> or C-63 <3.0L Engine> terminal 121.
Q: Is the harness wire in good condition?

YES : Go to Step 9.
NO :  Repair or replace the harness wire.

AC001729AW

CONNECTOR: C-43

C-43

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-298

STEP 9. Using scan tool MB991958, read the A/T 
diagnostic trouble code.

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 for A/T diagnostic trouble code.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC 56 set?

YES : Replace the PCM.
NO :  The procedure is complete.

SYMPTOM PROCEDURES

INSPECTION PROCEDURE 1: Engine does not Crank

.

COMMENT
If the engine does not crank when the selector lever 
is placed in the "P" or "N" position, the cause is prob-
ably a malfunction of the transmission range switch 
system, transaxle control cable assembly, engine 
system, torque converter or transaxle oil pump.

.

TROUBLESHOOTING HINTS (The most likely 
causes for this case:)

• Malfunction of the transmission range switch

• Malfunction of the transaxle control cable assem-

bly

• Malfunction of the engine system

• Malfunction of the torque converter

• Malfunction of the transaxle oil pump

• Malfunction of the PCM

DIAGNOSIS

Required Special Tool:

•  MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B

AC303127

AB

MB991911

16-PIN

MB991827

MB991824 

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-299

STEP 1. Using scan tool MB991958, read the A/T 
diagnostic trouble code.

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 for A/T diagnostic trouble code.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC 27 or 28 set?

YES <DTC 27 set> : Refer to 

P.23A-155

, DTC 27: 

Transmission Range Switch System (Open Circuit).

YES <DTC 28 set> : Refer to 

P.23A-192

, DTC 28: 

Transmission Range Switch System (Short Circuit).

NO :  Go to Step 2.

STEP 2. Check the transaxle control cable assembly.
Move the selector lever to each position. The manual control 
lever position of the transmission range switch should match 
the selector lever position.
Q: Is the manual control lever position correct?

YES : Go to Step 3.
NO :  Repair the transaxle control cable. Refer to 

P.23A-408

, Transmission Range Switch and Control 

Cable Adjustment. Retest the system to verify the 
repair.

STEP 3. Check the engine.
Refer to GROUP 13A <2.4L Engine>, Diagnosis 

− Trouble 

Symptom Chart 

− Starting 

P.13A-28

 or GROUP 13B <3.0L 

Engine>, Diagnosis 

− Trouble Symptom Chart − Starting 

P.13B-27

.

Q: Is the inspection result good?

YES : Go to Step 4.
NO :  Repair or replace the appropriate engine 

components.

AC303127

AB

MB991911

16-PIN

MB991827

MB991824 

AC001856

P

R

N

D

3

2

L

TRANSMISSION 
RANGE SWITCH

MANUAL
CONTROL
LEVER

AD

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-300

STEP 4. Check the torque converter.
(1) Remove the starter.
(2) Turn the torque converter and check for a binding or 

sticking condition. Check the ring gear for damaged or 
missing teeth.
NOTE: Since the torque converter drives the oil pump, turn-
ing the torque converter also checks for a binding oil pump. 
If either of these components are damaged the transaxle 
will need to be removed for inspection.

Q: Dose the torque converter turn freely without any 

missing or damaged teeth?
YES : Go to Step 5.
NO :  Replace the torque converter. Refer to GROUP 23B, 

Transaxle 

P.23B-10

.

STEP 5. Repair or replace the starter.
Q: Is the symptom eliminated?

YES : The procedure is complete.
NO :  Go to Step 6.

STEP 6. Replace the oil pump.
Replace the oil pump (Oil pump cannot be repaired). Refer to 
GROUP 23B, Transaxle 

P.23B-10

. Confirm that the malfunc-

tion symptom is eliminated.
Q: Is the symptom eliminated?

YES : The procedure is complete.
NO :  Go to Step 7.

STEP 7. Replace the PCM.
Q: Dose the engine crank when the selector lever is placed 

in the "P" or "N" position?
YES : The procedure is complete.
NO :  Start over at Step 1.

INSPECTION PROCEDURE 2: Does not Move Forward

.

COMMENT
If the engine is idling and the selector lever is shifted 
from "N" to "D", "2" or "L" range and the vehicle does 
not drive forward then the cause is due to line pres-
sure defect, under drive clutch or valve body mal-
function.

.

TROUBLESHOOTING HINTS (The most likely 
causes for this case:)

• Abnormal line pressure

• Malfunction of the underdrive solenoid valve

• Malfunction of the underdrive clutch

• Malfunction of the valve body

• Malfunction of the PCM

AC001857

AC001858

 

 

 

 

 

 

 

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