Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 447

AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

23A-79

STEP 8. Check the A/T fluid temperature sensor at A/T
control solenoid valve assembly connector B-40.
(1) Disconnect connector B-40 and measure at the sensor

side.

(2) Measure the resistance between terminal 1 and 2.

•

When A/T fluid temperature is 0

°

C (32

°

F), resistance

should be between 16.7 and 20.5 ohm.

•

When A/T fluid temperature is 20

°

C (68

°

F), resistance

should be between 7.3 and 8.9 ohm.

•

When A/T fluid temperature is 40

°

C (104

°

F), resistance

should be between 3.4 and 4.2 ohm.

•

When A/T fluid temperature is 80

°

C (176

°

F), resistance

should be between 1.9 and 2.2 ohm.

•

When A/T fluid temperature is 100

°

C (212

°

F),

resistance should be between 0.57 and 0.69 ohm.

Q: Is the resistance normal?

YES : Go to Step 9.
NO : Replace the A/T fluid temperature sensor. Refer to

GROUP 23B, Transaxle

P.23B-11

.

STEP 9. Check the power supply voltage at A/T control
solenoid valve assembly connector B-40.
(1) Disconnect connector B-40 and measure at the harness

side.

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

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

•

Voltage should be between 4.5 and 4.9 volts.

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

Q: Is the voltage normal?

YES : Go to Step 10.
NO : Repair it because of harness open circuit between A/

T control solenoid valve assembly connector B-40
terminal 1 and PCM connector C-61 <2.4L Engine> or
C-63 <3.0L Engine> terminal 124.

ACX02479

CONNECTOR: B-40

AE

ACX02103

HARNESS
CONNECTOR: B-40

AD

ACX02479

CONNECTOR: B-40

AE

ACX02103

HARNESS
CONNECTOR: B-40

AD

AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

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STEP 10. Check the continuity at A/T control solenoid
valve assembly connector B-40.
(1) Disconnect connector B-40 and measure at the harness

side.

(2) Check for the continuity between terminal 2 and ground.

•

Should be less than 2 ohm.

Q: Is the continuity normal?

YES : Go to Step 11.
NO : Repair it because of harness open circuit or damage

between A/T control solenoid valve assembly
connector B-40 terminal 2 and PCM connector C-54
<2.4L Engine> or C-55 <3.0L Engine> terminal 57.

STEP 11. Check harness for damage between A/T control
solenoid valve assembly connector B-40 terminal 1 and
PCM connector C-54 <2.4L Engine> or C-55 <3.0L Engine>
terminal 124.
Q: Is the harness wire in good condition?

YES : Repair it because of harness damage between A/T

control solenoid valve assembly connector B-40
terminal 2 and PCM connector C-64 <2.4L Engine> or
C-65 <3.0L Engine> terminal 57.

NO : Repair it.

ACX02479

CONNECTOR: B-40

AE

ACX02105

HARNESS
CONNECTOR: B-40

AD

ACX02479

CONNECTOR: B-40

AE

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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DTC 16: A/T Fluid Tenperature Sensor System (Short Circuit)

A/T Fluid Temperature Sensor System Circuit
Refer to

P.23B-11

.

CIRCUIT OPERATION
Refer to

P.23B-11

.

DTC SET CONDITIONS
If the A/T fluid temperature sensor output detects the
voltage which corresponds to 200

°

C (392

°

F) or more

than one second, there is an short circuit in the A/T
fluid temperature sensor and diagnostic trouble code
number "16" is output.

TROUBLESHOOTING HINTS (The most likely

causes for this code to be set:)

•

Malfunction of the A/T fluid temperature sensor
circuit

•

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 15:
A/T Fluid Temperature 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 15:

A/T Fluid Temperature Sensor.

•

At cool condition: Almost equal to the ambient
temperature (atmospheric temperature)

•

At warm condition: 70 to 80

°

C (158

°

F to 176

°

F)

(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.

AC001252

MB991502

16 PIN

AB

AUTOMATIC TRANSAXLE DIAGNOSIS

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AUTOMATIC TRANSAXLE

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STEP 2. Check the sensor output voltage at PCM
connector C-61 <2.4L Engine> or C-63 <3.0L Engine> by
backprobing.
(1) Do not disconnect connector C-61 <2.4L Engine> or C-63

<3.0L Engine>.

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

(3) Measure the voltage between terminal 124 and ground by

backprobing.

•

When A/T fluid temperature is 20

°

C (68

°

F), voltage

should be between 3.8 and 4.0 volts.

•

When A/T fluid temperature is 40

°

C (104

°

F), voltage

should be between 3.2 and 3.4 volts.

•

When A/T fluid temperature is 80

°

C (176

°

F), voltage

should be between 1.7 and 1.9 volts.

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

Q: Is the voltage normal?

YES : Go to Step 3.
NO : Go to Step 5.

STEP 3. Check connector C-61 <2.4L Engine> or C-63
<3.0L Engine> at PCM for damage.
Q: Is the connector in good condition?

YES : Go to Step 4.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

.

AC001657

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

PCM

AN

AC001792

C-61 <2.4L ENGINE> OR
C-63 <3.0L ENGINE>
CONNECTOR HARNESS
SIDE VIEW

AD

AC001657

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

PCM

AN