Mitsubishi Montero (2002-2004). Manual — part 586

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-41

STEP 7. Measure the ground voltage at barometric
pressure sensor connector B-48 by backprobing.
(1) Do not disconnect the connector B-48.
(2) Turn the ignition switch to the "ON" position.

(3) Measure the voltage between terminal No. 5 and ground by

backprobing.

• Voltage should be 0.5 volt or less.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?

YES : Go to Step 10.
NO : Go to Step 8.

STEP 8. Check connector B-48 at the barometric pressure
sensor and connector D-134 at PCM for damage.
Q: Is the connector in good condition?

YES : Go to Step 9.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 12.

AK200937

3

4

5

1

2

6

7

AB

HARNESS
CONNECTOR:
COMPONENT SIDE

CONNECTOR: B-48

B-48(B)

AKX01517

6 7

1 2 3 4 5

AJ

B-48 HARNESS
CONNECTOR:
HARNESS SIDE

AK200937

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4

5

1

2

6

7

AB

HARNESS
CONNECTOR:
COMPONENT SIDE

CONNECTOR: B-48

B-48(B)

AK201166

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CONNECTOR: D-134

AB

PCM

D-134(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-42

STEP 9. Check for open circuit between barometric
pressure sensor connector B-48 (terminal No. 5) and PCM
connector D-134 (terminal No. 88).
Q: Is the harness wire in good condition?

YES : Replace the PCM. Then go to Step 12.
NO : Repair it. Then go to Step 12.

STEP 10. Check connector B-48 at barometric pressure
sensor for damage.
Q: Is the connector in good condition?

YES : Go to Step 11.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 12.

AK200937

3

4

5

1

2

6

7

AB

HARNESS
CONNECTOR:
COMPONENT SIDE

CONNECTOR: B-48

B-48(B)

AK201166

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CONNECTOR: D-134

AB

PCM

D-134(GR)

HARNESS CONNECTOR:
COMPONENT SIDE

AK200937

3

4

5

1

2

6

7

AB

HARNESS
CONNECTOR:
COMPONENT SIDE

CONNECTOR: B-48

B-48(B)

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-43

STEP 11. Check connector D-134 and D-135 at PCM for
damage.
Q: Is the connector in good condition?

YES : Replace the volume airflow sensor. Then go to Step

12.

NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 12.

STEP 12. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to

GROUP 13A, Procedure 6

− Other Monitor

P.13Ab-2

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0108 set?

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

AK201564

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AB

D-134 HARNESS CONNECTOR:
COMPONENT SIDE

D-135 HARNESS CONNECTOR:
COMPONENT SIDE

CONNECTOR: D-134, D-135

PCM

D-134(GR)

D-135(GR)

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-44

DTC P0111: Intake Air Temperature Circuit Range/Performance Problem

.

CIRCUIT OPERATION

• Approximately 5 volts are applied to the intake air

temperature sensor output terminal (terminal No.
6) from the PCM (terminal No. 99) via the resistor
in the PCM. The ground terminal (terminal No. 5)
is grounded with PCM (terminal No. 88).

• 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.

.

SKY B

ULE

AK201128

RED-BLUE

INTAKE AIR TEMPERATURE SENSOR
(INCORPORATED IN VOLUME AIRFLOW
SENSOR)

POWERTRAIN CONTROL MODULE (PCM)

5 V

99

5

88

6

1 2 3 4 5 6 7

B-48

Intake Air Temperature Sensor Circuit

9192

939495

96979899

100

105

113114

115116117

118119120

106

107108109

110111112

101102103

104

D-135

(MU803805)

61
656667686970 717273
74757677787980 8182
8384

858687

8889

62

6364

D-134

(MU803804)

AK200940AC

CONNECTOR: B-48

INTAKE AIR
TEMPERATURE
SENSOR

B-48(B)

AK201038AK

CONNECTORS: D-134, D-135

PCM

D-134(GR) D-135(GR)