Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 472

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-180

STEP 2. Using scan tool MB991502, check data list item 29:
Vehicle Speed Sensor.

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Start the engine.
(3) Set scan tool MB991502 to data reading mode for item 29:

Vehicle Speed Sensor.

•

Check that the speedometer and MUT-II display speed
match when driving at a vehicle speed of 40 km/h (25
mph).

(4) Turn the ignition switch to "LOCK" (OFF) position.

Q: Is the sensor operating properly?

YES : 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 : Go to Step 3.

AC001252

MB991502

16 PIN

AB

AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

23A-181

STEP 3. Using the oscilloscope, check the waveform at
PCM connector C-57 <2.4L Engine> or C-59 <3.0L Engine>.
(1) Do not disconnect connector C-57<2.4L Engine> or C-59

<3.0L Engine>.

(2) Connect an oscilloscope probe to PCM connector C-

57<2.4L Engine> or C-59 <3.0L Engine> terminal 80 by
backprobing.

(3) Start the engine.

(4) Check the waveform.

•

The waveform should show a pattern similar to the
illustration when running the vehicle.

(5) Turn the ignition switch to "LOCK" (OFF) position.

Q: Is the waveform normal?

YES : Go to Step 5.
NO : Go to Step 4.

AC001657

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

AK

PCM

AC001954

OSCILLO-
SCOPE

PROBE

C-57 <2.4L ENGINE> OR
C-59 <3.0L ENGINE>
CONNECTOR HARNESS
SIDE VIEW

AD

ACX02131

NORMAL WAVEFORM

(V)

AC

AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

23A-182

STEP 4. Check connectors C-57 <2.4L Engine> or C-59
<3.0L Engine> at PCM and C-28 at intermediate connector
for damage.
Q: Are the connectors in good condition?

YES : Repair it because of harness open circuit or damage

between PCM connector C-57 <2.4L Engine> or C-59
<3.0L Engine> terminal 80 and intermediate
connector C-28 terminal 29.

NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

.

STEP 5. Check connector C-57 <2.4L Engine> or C-59
<3.0L Engine> at PCM for damage.
Q: Is the connector in good condition?

YES : Go to Step 6.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

.

AC001657

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

AK

PCM

AC001741 AJ

CONNECTOR: C-28

AC001657

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

AK

PCM

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-183

STEP 6. Using scan tool MB991502, check data list item 29:
Vehicle Speed Sensor.

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Start the engine.
(3) Set scan tool MB991502 to data reading mode for item 29,

Vehicle Speed Sensor.

•

Check that the speedometer and MUT-II display speed
match when driving at a vehicle speed of 40 km/h (25
mph).

(4) Turn the ignition switch to "LOCK" (OFF) position.

Q: Is the sensor operating properly?

YES : 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.

AC001252

MB991502

16 PIN

AB