Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 485

AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

23A-232

STEP 4. Check connectors B-42 at input shaft speed
sensor and C-61 <2.4L Engine> or C-63 <3.0L Engine> at
PCM for damage.
Q: Are the connectors in good condition?

YES : Go to Step 5.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

.

STEP 5. Check harness for damage between input shaft
speed sensor connector B-42 terminal 2 and PCM
connector C-61 <2.4L Engine> or C-63 <3.0L Engine>
terminal 103.
Q: Is the harness wire in good condition?

YES : Go to Step 6.
NO : Repair it.

AC001835

CONNECTOR: B-42

AD

AC001657

CONNECTOR: C-61 <2.4L ENGINE> OR
C-63 <3.0L ENGINE>

PCM

AN

AC001835

CONNECTOR: B-42

AD

AC001657

CONNECTOR: C-61 <2.4L ENGINE> OR
C-63 <3.0L ENGINE>

PCM

AN

AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

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STEP 6. Replace the input shaft speed sensor.
(1) Replace the input shaft speed sensor. Refer to GROUP

23B, Transaxle

P.23B-11

.

(2) Carry out a test drive.
(3) Read in the A/T diagnostic trouble code.

Q: Is the A/T diagnostic trouble code "52" is output?

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

STEP 7. Replace the underdrive clutch retainer.
(1) Replace the underdrive clutch retainer. Refer to GROUP

23B, Underdrive Clutch and Input Shaft

P.23B-54

.

(2) Carry out a test drive.
(3) Read in the diagnostic trouble code (DTC).

Q: Is the A/T diagnostic trouble code "52" is output?

YES : The A/T diagnostic trouble code may have set due to

external radio frequency (RFI), possibility caused by
cellular phone activity, after market components
installed on the vehicle, etc.

NO : The inspection is complete.

STEP 8. Replace the valve body.
(1) Replace the valve body. Refer to GROUP 23B, Transaxle

P.23B-11

.

(2) Carry out a test drive.
(3) Read in the A/T diagnostic trouble code.

Q: Is the A/T diagnostic trouble code "52" is output?

YES : Go to Step 9.
NO : The inspection is complete.

STEP 9. Replace the PCM.
(1) Replace the PCM.
(2) Carry out a test drive.
(3) Read in the A/T diagnostic trouble code.

Q: Is the A/T diagnostic trouble code "52" is output?

YES : Replace the torque converter. Refer to GROUP 23B,

Transaxle Assembly

P.23B-69

.

NO : The inspection is complete.

AC001835

INPUT SHAFT
SPEED SENSOR

AC

AC001836AB

AC001860 AB

VALVE
BODY
ASSEMBLY

AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

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DTC 53: Torque Converter Clutch is Stuck On

DTC SET CONDITIONS
If the torque converter clutch remains engaged for a
continuous period of ten seconds when the PCM is
attempting to disengage the torque converter clutch,
it is judged that the torque converter clutch is stuck
on and diagnostic trouble code number "53" is
output.

TROUBLESHOOTING HINTS (The most likely

causes for this code to be set:)

•

Malfunction of the torque converter clutch
solenoid valve

•

Damaged harness, connector

•

Malfunction of the PCM

DIAGNOSIS

Required Special Tool:
MB991502: Scan Tool (MUT-II)

STEP 1. Using scan tool MB991502, check data list item 52:
Amount of Torque Converter Clutch Slippage.

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 and run at constant speed of 50km/h

(31mph). (Gear range: 3rd gear)

(3) Set scan tool MB991502 to data reading mode for item 52:

Amount of Torque Converter Clutch Slippage.

•

Driving at constant speed of 50 km/h (31 mph), the
display should be "

−

10 to 10 r/min."

•

The display should be "

−

300 to

−

100 r/min" or "100 to

300 r/min" when the accelerator pedal is released (50
km/h (31 mph) and less).

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

Q: Is the sensor operating properly?

YES : This malfunction is 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 2.

STEP 2. Using scan tool MB991502, check actuator test
item 06: Torque Converter Clutch Solenoid Valve.
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to "ON" position.
(3) Set scan tool MB991502 to actuator test mode for item 06:

Torque Converter Clutch Solenoid Valve.

•

An operation sound should be heard from solenoid
valve when the torque converter clutch solenoid valve is
operated.

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

Q: Is the solenoid valve operating properly?

YES : Go to Step 3.
NO : Replace the torque converter clutch solenoid valve.

Refer to GROUP 23B, Valve Body

P.23B-69

.

AC001252

MB991502

16 PIN

AB

AC001252

MB991502

16 PIN

AB

AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

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STEP 3. Using scan tool MB991502, check data list item 52:
Amount of Torque Converter Clutch Slippage. (Second
check)
(1) Connect scan tool MB991502 to the data link connector.
(2) Start the engine and run at constant speed of 50km/h

(31mph). (Gear range: 3rd gear)

(3) Set scan tool MB991502 to data reading mode for item 52:

Amount of Torque Converter Clutch Slippage.

•

Driving at constant speed of 50km/h (31mph), the
display should be "

−

10 to 10 r/min."

•

The display should be "

−

300 to

−

100 r/min" or "100 to

300 r/min" when the accelerator pedal is released (50
km/h (31 mph) and less).

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

Q: Is the sensor operating properly?

YES : This malfunction is 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 4.

STEP 4. Replace the valve body.
(1) Replace the valve body. Refer to GROUP 23B, Transaxle

P.23B-11

.

(2) Carry out a test drive.
(3) Read in the A/T diagnostic trouble code.

Q: Is the A/T diagnostic trouble code "53" is output?

YES : Go to Step 5.
NO : The inspection is complete.

STEP 5. Replace the PCM.
(1) Replace the PCM.
(2) Carry out a test drive.
(3) Read in the A/T diagnostic trouble code (DTC).

Q: Is the A/T diagnostic trouble code "53" is output?

YES : Replace the Torque Converter. Refer to GROUP 23B,

Transaxle Assembly

P.23B-69

.

NO : The inspection is complete.

AC001252

MB991502

16 PIN

AB

AC001860 AB

VALVE
BODY
ASSEMBLY