Mitsubishi Lancer Evolution X. Manual - part 306

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI)

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STEP 1. Using scan tool MB991958, check data list item 53: 
Fuel Tank 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) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to the data reading mode for item 

53, Fuel Tank Temperature Sensor.

• Approximately the same as the ambient air temperature 

when the engine is cooled.

(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 Malfunctions 

P.00-15

.

NO :  Go to Step 2.

STEP 2. Check harness connector D-22 at the fuel tank 
temperature sensor for damage.
Q: Is the harness connector in good condition?

YES : Go to Step 3. 
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 6.

STEP 3. Check the fuel tank temperature sensor.
(1) Disconnect the fuel tank temperature sensor connector 

D-22.

(2) Measure the resistance between terminal No. 1 and No. 3 

of the fuel tank temperature sensor.

Standard value:

0.5 − 12.0 kΩ

Q: Is the measured resistance between 0.5 and 12.0 kΩ?

YES : Go to Step 4.
NO :  Replace the fuel tank temperature sensor. Then go to 

Step 6.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

1

2 3

4

5

AK203165

Fuel tank temperature
sensor connector

AC

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI)

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STEP 4. Check harness connector B-10 at ECM for 
damage.
Q: Is the harness connector in good condition?

YES : Go to Step 5.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 6.

STEP 5. Check for short circuit to ground between fuel 
tank temperature sensor connector D-22 (terminal No. 3) 
and ECM connector B-10 (terminal No. 115).
NOTE: Check harness after checking intermediate connector 
C-47. If the intermediate connector is damaged, repair or 
replace it. Refer to GROUP 00E, Harness Connector Inspec-
tion 

P.00E-2

. Then go to Step 6.

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-11

 or GROUP 42C, ID Codes 

Registration Judgment Table <Vehicles with WCM> 

P.42C-9

. Then go to Step 6.

NO :  Repair it. Then go to Step 6.

STEP 6. 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 23 

P.13A-9

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0182 set?

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

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI)

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DTC P0183: Fuel Tank Temperature Sensor Circuit High Input

1

2 3

4

5

AK604240

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

8

7

6

5

4

3

11

21

20

19

18

17

16

15

14

13

12

9

22

1

10

AC

FUEL TANK TEMPERATURE  SENSOR  CIRCUIT

6

3

2

1

BLA

CK

D-22

(MU802058)

115

FUEL TANK TEMPERATURE
SENSOR (INTEGRATED IN FUEL
PUMP MODULE)

5 V

WHITE-BLA

CK

WHITE-BLA

CK

B-10

C-47

FROM
COMBNATION
METER

ENGINE
CONTROL
MODULE

AK704235 AB

Connector: B-10

ECM

B-10 (GR)

AK704252

Connector: C-47

C-47

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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.

CIRCUIT OPERATION

• 5-volt voltage is applied to the fuel tank tempera-

ture sensor output terminal (terminal No. 3) from 
the ECM (terminal No. 115) via the resistor in the 
ECM.

• The fuel tank temperature sensor output voltage 

increases when the resistance increases and 
decreases when the resistance decreases. The 
ground terminal (terminal No. 1) is grounded to 
the vehicle body.

.

TECHNICAL DESCRIPTION

• The fuel tank temperature sensor converts the 

fuel tank temperature to a voltage.

• The ECM detects the fuel tank temperature with 

this output voltage.

.

DESCRIPTIONS OF MONITOR METHODS

Fuel tank temperature sensor 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

.

AK704253 AB

Fuel pump module (incorporating 
fuel level sensor (main) and 
fuel tank temperature sensor)

Connector: D-22

D-22 (GR)