Mitsubishi Galant (2004+). Manual — part 1106

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-117

STEP 4. Check for short circuit to ground between intake
air temperature sensor connector B-10 (terminal No. 1) and
PCM connector B-22 (terminal No. 107).
Q: Is the harness wire in good condition?

YES : Go to Step 5.
NO : Repair it. Then go to Step 6.

AK303015

2

1

3

4

AB

B-10 (GR)

CONNECTOR: B-10

HARNESS
CONNECTOR:
COMPONENT SIDE

AK303016

104

96

94

95

93 92 91

99 98 97

103 102 101 100

108 107 106 105

113 112 111 110 109

CONNECTOR: B-22

B-22 (B)

PCM

AB

HARNESS CONNECTOR:
COMPONENT SIDE

AIR CLEANER

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-118

STEP 5. Check harness connector B-22 at PCM for
damage.
Q: Is the harness connector in good condition?

YES : Replace the PCM. Then go to Step 6.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. 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 − Procedure 6 −

Other Monitor

P.13B-5

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0112 set?

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

AK303016

104

96

94

95

93 92 91

99 98 97

103 102 101 100

108 107 106 105

113 112 111 110 109

CONNECTOR: B-22

B-22 (B)

PCM

AB

HARNESS CONNECTOR:
COMPONENT SIDE

AIR CLEANER

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-119

DTC P0113: Intake Air Temperature Circuit High Input

CAUTION

If DTC P0113 has been set, TCL related DTC
U1120 is also set. After P0113 has been diag-
nosed, don't forget to erase DTC U1120.

.

BLA

CK

AK302835

RED-BLUE

INTAKE AIR TEMPERATURE SENSOR
(INTERGATED IN MASS AIRFLOW
SENSOR)

POWERTRAIN CONTROL MODULE (PCM)

5 V

107

4

69

1

B-10

Intake Air Temperature Sensor Circuit

B-21

B-22

1

2

3

4

BLA

CK

100

99

92

91

93 94 95

96 97 98

101 102 103 104

105 106 107 108

109 110 111 112 113

52

51

53 54 55 56

57

58 59 60 61 62

63

64 65 66 67 68 69

70

71 72 73 74 75

76

77 78 79 80 81 82

83

AK303012

CONNECTOR: B-10

AC

B-10 (GR)

INTAKE AIR
TEMPERATURE
SENSOR
(INTEGRATED IN
MASS AIRFLOW
SENSOR)

AK303013

CONNECTORS: B-21, B-22

PCM

AB

AIR CLEANER

B-22 (B)

B-21 (B)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-120

CIRCUIT OPERATION

• Approximately 5 volts are applied to the intake air

temperature sensor output terminal (terminal No.
1) from the PCM (terminal No. 107) via the resis-
tor in the PCM. The ground terminal (terminal No.
4) is grounded with PCM (terminal No. 69).

• The intake air temperature sensor is a negative

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

• The intake air temperature sensor output voltage

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

.

TECHNICAL DESCRIPTION

• The intake air temperature sensor converts the

intake air temperature to a voltage.

• The PCM checks whether this voltage is within a

specified range.

.

DESCRIPTIONS OF MONITOR METHODS
Intake air 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

.