Mitsubishi Eclipse. Manual - part 774

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-105

STEP 9. Check the harness for open circuit between 
crankshaft position sensor connector B-20 terminal 2 and 
PCM connector C-54 <2.4L Engine> or C-55 <3.0L Engine> 
terminal 45.
Q: Is the harness wire in good condition?

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

STEP 10. Check PCM connector C-54 <2.4L Engine> or 
C-55 <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 11.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

.

AC004926AC

CONNECTOR: B-20
<2.4L ENGINE>

B-20

AC004927AC

CONNECTOR: B-20
<3.0L ENGINE>

B-20

AC001657

CONNECTOR: C-54 <2.4L ENGINE> OR
C-55 <3.0L ENGINE>

PCM

BA

C-54 <2.4L ENGINE> OR C-55 <3.0L ENGINE>

AC001657

CONNECTOR: C-54 <2.4L ENGINE> OR
C-55 <3.0L ENGINE>

PCM

BA

C-54 <2.4L ENGINE> OR C-55 <3.0L ENGINE>

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-106

STEP 11. Check the harness for a short circuit to ground 
between crankshaft position sensor connector B-20 
terminal 2 and PCM connector C-54 <2.4L Engine> or C-55 
<3.0L Engine> terminal 45.
Q: Is the harness wire in good condition?

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

AC004926AC

CONNECTOR: B-20
<2.4L ENGINE>

B-20

AC004927AC

CONNECTOR: B-20
<3.0L ENGINE>

B-20

AC001657

CONNECTOR: C-54 <2.4L ENGINE> OR
C-55 <3.0L ENGINE>

PCM

BA

C-54 <2.4L ENGINE> OR C-55 <3.0L ENGINE>

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-107

STEP 12. Measure the power supply voltage at crankshaft 
position sensor connector B-20.
(1) Disconnect connector B-20 and measure at the harness 

side.

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

(3) Measure the voltage between terminal 3 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 15.
NO :  Go to Step 13.

STEP 13. Check MFI relay connector A-18X in the engine 
component relay box 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 14.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

.

AC004926AC

CONNECTOR: B-20
<2.4L ENGINE>

B-20

AC004927AC

CONNECTOR: B-20
<3.0L ENGINE>

B-20

ACX02112

B-20 HARNESS
CONNECTOR:
COMPONENT SIDE

AK

AC102447AE

BATTERY

CONNECTOR: A-18X

A-18X

FRONT OF VEHICLE

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-108

STEP 14. Check the harness for open circuit or short 
circuit to ground between MFI relay connector A-18X 
terminal 4 in the engine component relay box and 
crankshaft position sensor connector B-20 terminal 3.
Q: Is the harness wire in good condition?

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

AC102447AE

BATTERY

CONNECTOR: A-18X

A-18X

FRONT OF VEHICLE

AC004926AC

CONNECTOR: B-20
<2.4L ENGINE>

B-20

AC004927AC

CONNECTOR: B-20
<3.0L ENGINE>

B-20