Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 92

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-67

STEP 17. Check for harness damage between intake air
temperature sensor connector B-14 terminal 5 and ECM
connector C-60 terminal 92 <M/T> or PCM connector C-54
terminal 57 <A/T>.
Q: Is the harness wire in good condition?

YES : Go to Step 18.
NO : Repair it. Then go to Step 19.

STEP 18. Check for harness damage between intake air
temperature sensor connector B-14 terminal 6 and ECM
connector C-60 terminal 72 <M/T> or PCM connector C-54
terminal 64 <A/T>.
Q: Is the harness wire in good condition?

YES : Replace the ECM or PCM. Then go to Step 19.
NO : Repair it. Then go to Step 19.

ACX02480

CONNECTOR : B-14

AG

INTAKE AIR
TEMPERATURE
SENSOR

AK000280

C-54

C-60

ECM<M/T>
OR
PCM<A/T>

CONNECTORS:C-60<M/T>,C-54<A/T>

BB

ACX02480

CONNECTOR : B-14

AG

INTAKE AIR
TEMPERATURE
SENSOR

AK000280

C-54

C-60

ECM<M/T>
OR
PCM<A/T>

CONNECTORS:C-60<M/T>,C-54<A/T>

BB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-68

STEP 19. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to,

Procedure 6

−

Other Monitor (

P.13A-5

).

(2) Check the diagnostic trouble code (DTC).

Q: Is the DTC P0111 is output?

YES : Retry the troubleshooting.
NO : The inspection is complete.

DTC P0115: Engine Coolant Temperature Circuit High Input

AK000655

1 2

BLA

CK

YELLO

W

-GREEN

92<M/T>
57<A/T>

83<M/T>
44<A/T>

C-60<M/T>
(MU803772)

C-54<A/T>
(MU803781)

ENGINE CONTROL
MODULE(ECM)<M/T>
OR
POWERTRAIN CONTROL
MODULE(PCM)<A/T>

ENGINE COOLANT
TEMPERATURE SENSOR

B-11
(MU802406)

2

1

5V

82

78

81

80

89 90 91 92

79

87

71

74

73

72

76

75

77

85

88

83 84

86

42 43
48 49 50 51 52 53 54 55 56 57

46

45

44

58 59

60 6162 63

64 65 66

47

41

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-69

CIRCUIT OPERATION

•

5-volt voltage is applied to the engine coolant
temperature sensor output terminal (terminal 1)
from the ECM (terminal 83) <M/T> or PCM
(terminal 44) <A/T> via the resistor in the ECM
<M/T> or PCM <A/T>. The ground terminal
(terminal 2) is grounded with ECM (terminal 92)
<M/T> or (terminal 57) <A/T>.

•

The engine coolant temperature sensor is a
negative temperature coefficient type of resistor.
It has the characteristic that when the engine
coolant temperature rises the resistor decreases.

•

The engine coolant temperature sensor output
voltage increases when the resistor increases
and decreases when the resistor decreases.

TECHNICAL DESCRIPTION

•

The engine coolant temperature sensor converts
the engine coolant temperature to a voltage and
output it.

•

The ECM <M/T> or PCM <A/T> checks whether
this voltage is within a specified range.

DTC SET CONDITIONS

Check Conditions

•

Engine coolant temperature was 7

°

C (44.6

°

F) or

more immediately before the engine was stopped
at the last drive.

•

Engine coolant temperature was 7

°

C (44.6

°

F) or

more when the engine started.

Judgement Criteria

•

Engine coolant temperature fluctuates within 1

°

C

(33.8

°

F) after five minutes have passed since the

engine was started.

•

However, time is not counted if any of the
following conditions are met.

1. Intake air temperature is 60

°

C (140

°

F) or

more.

2. Volume air flow sensor output frequency is 70

Hz or less.

3. During fuel shut-off operation.

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

•

Engine coolant temperature sensor failed.

•

Open or shorted engine coolant temperature
sensor circuit, or loose connector.

•

ECM failed. <M/T>

•

PCM failed. <A/T>

DIAGNOSIS

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

ACX02478 AD

ENGINE COOLANT
TEMPERATURE
SENSOR

CONNECTOR : B-11

AK000280

C-54

C-60

ECM<M/T>
OR
PCM<A/T>

CONNECTORS:C-60<M/T>,C-54<A/T>

BB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-70

STEP 1. Using scan tool MB991502, check data list item 21:
Engine Coolant Temperature Sensor.

CAUTION

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

21, Engine Coolant Temperature Sensor.

•

The engine coolant temperature and temperature
shown with the scan tool should approximately match.

(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 (

P.00-6

).

NO : Go to Step 2.

STEP 2. Check the sensor output voltage at engine coolant
temperature sensor connector B-11 by backprobing.
(1) Do not disconnect the connector B-11.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 1 and ground by

backprobing.

•

When engine coolant temperature is 0

°

C(32

°

F),

voltage should be 3.2 and 3.8 volts.

•

When engine coolant temperature is 20

°

C(68

°

F),

voltage should be 2.3 and 2.9 volts.

•

When engine coolant temperature is 40

°

C(104

°

F),

voltage should be 1.3 and 1.9 volts.

•

When engine coolant temperature is 80

°

C(176

°

F),

voltage should be 0.3 and 0.9 volts.

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

Q: Is the voltage normal?

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

STEP 3. Check connector B-11 at the engine coolant
temperature sensor 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

). Then go to Step 14.

AKX01177

16 PIN

MB991502

AB

AK000233

B-11 CONNECTOR
HARNESS
SIDE VIEW

1 2

AB

ACX02478 AD

ENGINE COOLANT
TEMPERATURE
SENSOR

CONNECTOR : B-11