Mitsubishi Evolution X. Manual - part 280

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-97

STEP 7. Check for harness damage between intake air 
temperature sensor 2 connector B-16 (terminal No. 1) and 
ECM connector B-10 (terminal No. 98).
NOTE: Check harness after checking intermediate connector 
A-13. If intermediate connector is damaged, repair or replace it. 
Repair to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Then go to Step 8.

Q: Is the harness wire in good condition?

YES : Replace the ECM. When the ECM is replaced, 

register the ID code. Refer to GROUP 42B, ID Code 
Registration Necessity Judgment Table <Vehicles 
with KOS> 

P.42B-12

 or GROUP 42C, ID Codes 

Registration Judgment Table <Vehicles with WCM> 

P.42C-9

. Then go to Step 8.

NO :  Repair it. Then go to Step 8.

STEP 8. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to 

Diagnostic Function 

− OBD-II Drive Cycle − Pattern 7 

P.13A-9

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0096 set?

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

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-98

DTC P0097: Intake Air Temperature Circuit Low Input (sensor 2)

.

CIRCUIT OPERATION

• Approximately 5 volts are applied to the intake air 

temperature sensor 2 output terminal (terminal 
No. 1) from the ECM (terminal No. 98) via the 
resistor in the ECM. The ground terminal (termi-
nal No. 2) is grounded with ECM (terminal No. 
97).

• The intake air temperature sensor 2 is a negative 

temperature coefficient type of resistor. When the 
intake air temperature rises, the resistance 
decreases.

• The intake air temperature sensor 2 output volt-

age increases when the resistance increases and 
decreases when the resistance decreases.

.

TECHNICAL DESCRIPTION

• The intake air temperature sensor 2 converts the 

intake air temperature to a voltage.

• The ECM checks whether this voltage is within a 

specified range.

.

AK704399

71 72 73 74 75 76 77 78 79 80 81 82

83 84 85 86 87 88 89 90 91 92 93 94

95 96 97 98 99

100 101 102 103 104

112 113 114

109

108

107

110 111

115 116

106

105

118

117

2

1

2

8

7

6

5

4

3

11

21

20

19

18

17

16

15

14

13

12

9

22

1

10

AB

97

98

INTAKE AIR TEMPERATURE
SENSOR 2

ENGINE CONTROL MODULE

2

1

16

17

5 V

INTAKE AIR TEMPERATURE SENSOR 2 CIRCUIT

GREEN-

RED

GREEN-

RED

BLA

CK-

YELO

W

BLA

CK-

YELO

W

B-16

A-13

(MU802409)

B-10

AK704235 AB

Connector: B-10

ECM

B-10 (GR)

AK704400

AB

Connector: B-16

B-16 (B)

Intake air temperature
sensor 2

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-99

DESCRIPTIONS OF MONITOR METHODS

Intake air temperature sensor 2 output voltage is out 

of specified range.

.

MONITOR EXECUTION

Continuous

.

MONITOR EXECUTION CONDITIONS 
(Other monitor and Sensor)

Other Monitor (There is no temporary DTC stored 

in memory for the item monitored below)

• Not applicable

Sensor (The sensor below is determined to be 

normal)

• Not applicable

.

DTC SET CONDITIONS
Logic Flow Chart

.

Check Condition

• 2 seconds or more have passed since the engine 

starting sequence was completed.

Judgement Criterion

• Intake air temperature sensor 2 output voltage 

has continued to be 0.2 volt or lower [correspond-
ing to an intake air temperature of 115

° C (239° F) 

or higher] for 2 seconds.

.

Output voltage < 0.2V

Output voltage > 4.6V

End

No

No

No

Malfunction

Good

No

AK604315

Start

Yes

Yes

Yes

Yes

Continuous

failure for 2secs

Monitoring
conditions

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-100

FAIL-SAFE AND BACKUP FUNCTION

• Control as if the intake air temperature in the 

intake manifold is 25 

° C.

.

OBD-II DRIVE CYCLE PATTERN

Refer to Diagnostic Function 

− OBD-II Drive Cycle − 

Pattern 23 

P.13A-9

.

.

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

• Intake air temperature sensor 2 failed.

• Shorted intake air temperature sensor 2 circuit, or 

connector damage.

• ECM failed. 

DIAGNOSIS

STEP 1. Check harness connector B-16 at the intake air 
temperature sensor 2 for damage.
Q: Is the harness connector in good condition?

YES : Go to Step 2.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 5.

STEP 2. Check the intake air temperature sensor 2.
(1) Disconnect the intake air temperature sensor 2 connector 

B-16.

(2) Measure the resistance between intake air temperature 

sensor 2 side connector terminal No. 1 and No. 2.

• There should be continuity. (0.23 − 18 kΩ)

Q: Is the measured resistance between 0.23 and 18 k

Ω?

YES : Go to Step 3.
NO :  Replace the intake air temperature sensor 2. Then go 

to Step 5..

STEP 3. Check for short circuit to ground between intake 
air temperature sensor 2 connector B-16 (terminal No. 1) 
and ECM connector B-10 (terminal No. 98).
NOTE: Check harness after checking intermediate connector 
A-13. If intermediate connector is damaged, repair or replace it. 
Repair to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Then go to Step 5.

Q: Is the harness wire in good condition?

YES : Go to Step 4.
NO :  Repair it. Then go to Step 5.

AK704080

2

1

AB

Intake air temperature
sensor 2 connector