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Mitsubishi Eclipse. Manual - part 758

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-41

LINE PRESSURE ADJUSTMENT

M1231001700338

1. Drain the transmission fluid.

NOTE: The hydraulic pressure test must be performed
before attempting any adjustments.

2. Remove the valve body cover.
3. Turn the adjusting screw shown in the illustration to adjust

the line pressure to the standard value. The pressure
increases when the screw is turned counterclockwise.
NOTE: When adjusting the line pressure, adjust to the mid-
dle of the standard value range.

Standard value: 1.01

− 1.05 MPa (147 − 152 psi)

4. Install the valve body cover. Pour in one quart transmission

fluid.

5. Repeat the hydraulic pressure test. (Refer to

P.23A-28

Readjust the line pressure if necessary.

DIAGNOSTIC TROUBLE CODE CHART

M1231007900299

AC006153AB

ADJUSTING
SCREW

A/T DTC
NO.

MFI DTC
NO.

DIAGNOSIS ITEM

REFERENCE
PAGE

−

TP sensor system

Short circuit

P.23A-43

−

Open circuit

P.23A-54

−

Sensor out of adjustment

P.23A-64

P0713

Transmission fluid temperature sensor
system

Open circuit

P.23A-77

P0712

Short circuit

P.23A-87

−

Crankshaft position sensor system

Open circuit

P.23A-96

P0715

Input shaft speed sensor system

Short circuit/open circuit

P.23A-117

P0720

Output shaft speed sensor system

Short circuit/open circuit

P.23A-131

−

Stoplight switch system

Short circuit

P.23A-146

P0705

Transmission range switch system

Open circuit

P.23A-155

P0705

Short circuit

P.23A-192

P0753

Low-reverse solenoid valve system

Short circuit/open circuit

P.23A-209

P0758

Underdrive solenoid valve system

Short circuit/open circuit

P.23A-219

P0763

Second solenoid valve system

Short circuit/open circuit

P.23A-228

P0768

Overdrive solenoid valve system

Short circuit/open circuit

P.23A-237

P0743

Torque converter clutch solenoid system Short circuit/open circuit

P.23A-246

P0731

1st gear incorrect ratio

P.23A-255

P0732

2nd gear incorrect ratio

P.23A-255

P0733

3rd gear incorrect ratio

P.23A-255

P0734

4th gear incorrect ratio

P.23A-255

P0736

Reverse gear incorrect ratio

P.23A-255

P0741

Torque converter clutch solenoid system Defective system

P.23A-270

P0742

Clutch stuck on

P.23A-275

AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

23A-42

NOTE: The MFI diagnostic trouble codes are the codes which are set when item "MFI" is selected on scan
tool MB991958 (MUT-III sub assembly). However, the codes above indicate failure in the automatic transmis-
sion.

SYMPTOM CHART

M1231008000255

P1751

A/T control relay system

Short circuit to ground/
open circuit

P.23A-279

−

"N" range light system <Vehicles with
sport mode>

Open circuit

P.23A-292

A/T DTC
NO.

MFI DTC
NO.

DIAGNOSIS ITEM

REFERENCE
PAGE

SYMPTOMS

INSPECTION
PROCEDURE NO.

REFERENCE PAGE

Communication with
scan tool is not
possible

Communication with
all systems is
impossible

2.4L Engine

Group 13A, diagnosis

P.13A-737

3.0L Engine

Group 13B, diagnosis

P.13B-908

Communication with
the PCM only is
impossible

2.4L Engine

Group 13A, diagnosis

P.13A-740

3.0L Engine

Group 13B, diagnosis

P.13B-911

Driving impossible

Engine does not crank

P.23A-298

Does not move forward

P.23A-300

Does not move backward

P.23A-303

Does not move (forward or backward)

P.23A-305

Malfunction when
moving selector into
gear

Engine stalls when moving selector lever
from "N" to "D" or "N" to "R"

P.23A-307

Shift shock when shifting from "N" to "D"
and long delay

P.23A-308

Shift shock when shifting from "N" to "R"
and long delay

P.23A-312

Shift shock when shifting from "N" to "D"
or "N" to "R" and long delay

P.23A-315

Malfunction when
shifting

Shift shock and slipping

P.23A-316

Does not shift
properly

Early or late shifting in all gears

P.23A-319

Early or late shifting in some gears

P.23A-321

Does not shift

No diagnostic trouble codes

P.23A-323

Malfunction while
driving

Poor acceleration

P.23A-326

Vibration

P.23A-328

Vehicle shifts differently with A/C engaged

P.23A-331

Transaxle won't downshift under load with auto-cruise engaged 16

P.23A-343

Vehicle speed signal system

P.23A-352

Shift switch assembly system <Vehicles with sport mode>

P.23A-359

AUTOMATIC TRANSAXLE DIAGNOSIS

TSB Revision

AUTOMATIC TRANSAXLE

23A-43

DIAGNOSTIC TROUBLE CODE PROCEDURES

DTC 11: TP Sensor System (Short Circuit)

CIRCUIT OPERATION

• When the throttle valve shaft rotates from the idle

position to the fully opened position, the resis-
tance between the TP sensor output terminal (ter-
minal 3) and ground terminal (terminal 1)
increases according to the degree of rotation.

• With the ignition switch in the "ON" position, volt-

age at pin 78 increases from approximately 0.7
volt at closed throttle, to approximately 5 volts at
wide open throttle.

DTC SET CONDITIONS
If the PCM output voltage is greater than 4.8 volts
when the engine is idling, the output is judged to be
too high and DTC 11 is set.

TROUBLESHOOTING HINTS (The most likely
causes for this code to be set:)

• Malfunction of the TP sensor circuit

• Damaged harness, connector

• Malfunction of the PCM

AC004681AD

TP Sensor System Circuit

AC001831AF

CONNECTOR: B-07

<2.4L ENGINE>

<3.0L ENGINE>

B-07

AC001657

CONNECTORS: C-54 <2.4L ENGINE> OR
C-55 <3.0L ENGINE>, C-57 <2.4L ENGINE>
OR C-59 <3.0L ENGINE>

PCM

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

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

AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

23A-44

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

STEP 1. Using scan tool MB991958, check data list item 11:
TP Sensor.

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) Set scan tool MB991958 to data reading mode for item 11:

TP Sensor.

• With the throttle valve in idle position, voltage should be

between 535 and 735 mV.

• With the throttle valve in full-open position, voltage

should be between 4,500 and 5,500 mV.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 535 and 735 mV at

idle, and between 4,500 and 5,500 mV in the full-open
position?
YES : It can be assumed that 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.

AC303127

MB991911

16-PIN

MB991827

MB991824

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