Mitsubishi Eclipse. Manual - part 801

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-213

STEP 2. Using scan tool MB991958, read the A/T 
diagnostic trouble code.
(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 54 set? (DTC 54 may be set along with multiple 

DTCs).
YES : Refer to 

P.23A-279

 DTC 54: A/T Control Relay 

System.

NO :  Go to Step 3.

STEP 3. Using scan tool MB991958, read the A/T 
diagnostic trouble code.
(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 36 set?

YES : Go to Step 8.
NO :  Go to Step 4.

AC303127

AB

MB991911

16-PIN

MB991827

MB991824 

AC303127

AB

MB991911

16-PIN

MB991827

MB991824 

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-214

STEP 4. Measure the low-reverse solenoid valve resistance 
at A/T control solenoid valve assembly connector B-40.
(1) Disconnect connector B-40 and measure at the solenoid 

valve side.

(2) Measure the resistance between solenoid valve assembly 

connector B-40 terminals 6 and 10.

Resistance value: 2.7

−3.4 Ω [at 20°C (68°F)]

Q: Is the measured resistance 2.7

−3.4 Ω [at 20°C (68°F)]?

YES : Go to Step 6.
NO :  Go to Step 5.

STEP 5. Measure the solenoid valve resistance at the 
low-reverse solenoid valve assembly inside the transaxle.
(1) Disconnect connector B-40-5 and measure at the solenoid 

valve side.

(2) Measure the resistance between low-reverse solenoid 

valve terminals 1 and 2.

Resistance value: 2.7

−3.4 Ω [at 20°C (68°F)]

Q: Is the measured resistance 2.7

−3.4 Ω [at 20°C (68°F)?

YES : Replace the harness wire between A/T control 

solenoid valve assembly connector B-40 and the 
solenoid valves.

NO :  Replace the low-reverse solenoid valve. Refer to 

GROUP 23B, Valve Body 

P.23B-74

.

ACX02479

CONNECTOR: B-40

AK

B-40

AC001960 AN

B-40 HARNESS CONNECTOR:
A/T CONTROL SOLENOID VALVE
ASSEMBLY SIDE

AC002219

CONNECTOR: B-40-5

CH

B-40-5

VALVE BODY
ASSEMBLY

2

1

2

1

AC201141BE

B-40-5 HARNESS CONNECTOR:
LOW-REVERSE
SOLENOID VALVE SIDE

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-215

STEP 6. Check A/T control solenoid valve assembly 
connector B-40 and 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 connectors and terminals in good condition?

YES : Go to Step 7.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

.

STEP 7. Check the harness for an open or short circuit to 
ground between A/T control solenoid valve assembly 
connector B-40 terminal 6 and PCM connector C-61 <2.4L 
Engine> or C-63 <3.0L Engine> terminal 129.
Q: Is the harness wire in good condition?

YES : Replace the PCM.
NO :  Repair or replace the harness wire.

ACX02479

CONNECTOR: B-40

AK

B-40

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>

ACX02479

CONNECTOR: B-40

AK

B-40

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-216

STEP 8. Measure the supply voltage at A/T control 
solenoid valve assembly connector B-40.
(1)  Disconnect solenoid valve assembly harness connector 

B-40.

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

(3) Measure the voltage between harness connector B-40 

terminal 10 and ground.

• The voltage should equal 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 11.
NO :  Go to Step 9.

STEP 9. Check A/T control relay connector A-17X in the 
engine component relay box and A/T control solenoid 
valve assembly connector B-40 for loose, corroded or 
damaged terminals, or terminals pushed back in the 
connector.
Q: Are the connectors 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

.

ACX02479

CONNECTOR: B-40

AK

B-40

AC001966 AO

B-40 HARNESS
CONNECTOR:
COMPONENT SIDE

AC102447AF

BATTERY

CONNECTOR: A-17X

A-17X

FRONT OF VEHICLE

ACX02479

CONNECTOR: B-40

AK

B-40