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Mitsubishi Eclipse. Manual - part 767

AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

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DTC 15 (P0713): Transmission Fluid Temperature Sensor System (Open Circuit)

CIRCUIT OPERATION

• The PCM (terminal 124) applies 5 volts to the

transmission fluid temperature sensor output ter-
minal (terminal 1).

• The transmission fluid temperature sensor circuit

is grounded to the PCM (terminal 57).

• When the transmission fluid temperature is cold,

the transmission fluid temperature sensor resis-
tance is high. When the transmission fluid tem-
perature is hot, the transmission fluid
temperature sensor resistance is low.

DESCRIPTIONS OF MONITOR METHODS
If transmission fluid temperature is below specified
value even after driving test for more than specified
period, PCM judges that transmission fluid tempera-
ture sensor has a failure.

MONITOR EXECUTION
Continuous

AC102446AD

Transmission Fluid Temperature Sensor System Circuit

ACX02479

CONNECTOR: B-40

B-40

AC001657

CONNECTORS: C-54 <2.4L ENGINE> OR
C-55 <3.0L ENGINE>, C-61 <2.4L ENGINE>
OR C-63 <3.0L ENGINE>

PCM

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

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

AUTOMATIC TRANSAXLE DIAGNOSIS

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MONITOR EXECUTION CONDITIONS (Other
monitor and Sensor)

Other Monitor (There is no temporary DTC stored

in memory for the item monitored below)

• DTC23 (P0720): Output shaft speed sensor mal-

function

Sensor (The sensor below is determined to be

normal)

• Output shaft speed sensor

LOGIC FLOW CHARTS (Monitor Sequence)

Good

Malfunction

Timer start

Engine speed

OPG-B

: Output speed (output

shaft speed sensor)

Timer hold

Timer accumulate

START

> 1,000 r/min and

OPG-B

> 1,000 r/min

Continuous failure
for 1 sec.

Transmission fluid
temperature sensor
voltage > 4.5 V

Timer > 10 min.

END

> 1,000 r/min and

OPG-B

> 1,000 r/min

AC205204

Yes

AUTOMATIC TRANSAXLE DIAGNOSIS

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DTC SET CONDITIONS

Check Conditions

• Engine speed: 1,000 r/min or more.

• Output speed: 1,000 r/min or more.

• Accumulated time in above condition: 10 min-

utes.

Judgement Criteria

• Transmission fluid temperature sensor voltage:

4.5 volts or more. (1 second)

OBD-II DRIVE CYCLE PATTERN
Start the engine, drive at 60 km/h (37 mph) or more
for 15 minutes in total, and turn OFF the ignition
switch. Then restart the engine, and drive at 60 km/h
(37 mph) or more for 15 minutes in total.

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

• Malfunction of the transmission fluid temperature

sensor circuit

• Damaged harness or connector

• Malfunction of the PCM

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 15:
Transmission Fluid Temperature 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) Start the engine.
(3) Set scan tool MB991958 to the data reading mode for item

15: Transmission Fluid Temperature Sensor.

• When the engine is cool: Almost equal to the ambient

temperature (atmospheric temperature)
NOTE: Set scan tool MB991958 to data reading mode
for item number 13, Intake Air Temperature (IAT) Sensor
and note the temperature measurement. When the
engine is cool, the temperature should be almost equal
to the ambient temperature (atmospheric temperature),
and the IAT sensor measurement should be approxi-
mately the same as the Transmission Fluid Temperature
Sensor.

• When the engine is warm: 70 to 80°C (158 to 176°F)

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?

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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STEP 2. Measure the sensor output voltage at the A/T
control solenoid valve assembly connector B-40 by
backprobing.
(1) Do not disconnect connector B-40.
(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal 1 and ground by

backprobing.

• When transmission fluid temperature is 20°C (68°F),

voltage should measure between 3.8 and 4.0 volts.

• When transmission fluid temperature is 40°C (104°F),

voltage should measure between 3.2 and 3.4 volts.

• When transmission fluid temperature is 80°C (176°F),

voltage should measure between 1.7 and 1.9 volts.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage within the specified range?

YES : Go to Step 6.
NO : Go to Step 3.

STEP 3. Measure the ground voltage at the A/T control
solenoid valve assembly connector B-40 by backprobing.
(1) Do not disconnect connector B-40.
(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal 2 and ground by

backprobing.

• The voltage should measure 0.5 volt or less.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage 0.5 volt or less?

YES : Go to Step 4.
NO : Go to Step 7.

ACX02479

CONNECTOR: B-40

B-40

AC200996AH

B-40 HARNESS
CONNECTOR:
HARNESS SIDE

ACX02479

CONNECTOR: B-40

B-40

AC201005AH

B-40 HARNESS
CONNECTOR:
HARNESS SIDE

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