Mitsubishi Montero (2002-2004). Manual - part 584

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-33

STEP 14. Check for harness damage 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 18.
NO :  Repair it. Then go to Step 18.

STEP 15. Check connector B-48 at barometric pressure 
sensor for damage.
Q: Is the connector in good condition?

YES : Go to Step 16.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 18.

AK200937

3

4

5

1

2

6

7

AB

HARNESS 
CONNECTOR: 
COMPONENT SIDE

CONNECTOR: B-48

B-48(B)

AK201166

61

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76

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85

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81

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88

89

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)

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-34

STEP 16. Check connector D-135 at PCM for damage.
Q: Is the connector in good condition?

YES : Go to Step 17.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 18.

STEP 17. Check for short circuit to ground and harness 
damage between barometric pressure sensor connector B-
48 (terminal No. 2) and PCM connector D-135 (terminal No. 
100).
Q: Is the harness wire in good condition?

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

18.

NO :  Repair it. Then go to Step 18.

AK200947

91

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CONNECTOR: D-135

HARNESS CONNECTOR: 
COMPONENT SIDE

AB

PCM

D-135(GR)

AK200937

3

4

5

1

2

6

7

AB

HARNESS 
CONNECTOR: 
COMPONENT SIDE

CONNECTOR: B-48

B-48(B)

AK200947

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CONNECTOR: D-135

HARNESS CONNECTOR: 
COMPONENT SIDE

AB

PCM

D-135(GR)

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-35

STEP 18. 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 P0107 set?

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

DTC P0108: Barometric Pressure Circuit High Input

AK201127

GREEN-YELLO

W

GREEN-WHITE

SKY B

ULE

BAROMETRIC PRESSURE SENSOR
(INCORPORATED IN VOLUME AIRFLOW 
 SENSOR)

1

97

5 V

100

88

2

5

POWERTRAIN CONTROL MODULE (PCM)

1 2 3 4 5 6 7

B-48

Barometric Pressure 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)

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-36

.

CIRCUIT OPERATION

• A 5-volt voltage is supplied to the barometric 

pressure sensor power terminal (terminal No. 1) 
from the PCM (terminal No. 97). The ground ter-
minal (terminal No. 5) is grounded with PCM (ter-
minal No. 88).

• A voltage that is proportional to the atmospheric 

pressure is sent to the PCM (terminal No. 100) 
from the barometric pressure sensor output ter-
minal (terminal No. 2).

.

TECHNICAL DESCRIPTION

• The barometric pressure sensor outputs a volt-

age which corresponds to the barometric pres-
sure.

• The PCM checks whether this voltage is within a 

specified range.

.

DTC SET CONDITIONS

Check Conditions

• 2 seconds or more have passed since the start-

ing sequence was completed.

• Battery positive voltage is higher than 8 volts.

Judgement Criteria

• Barometric pressure sensor output signal has 

continued to be approximately 113 kPa (16 psi) or 
higher (approximately 4,000 ft below sea level) 
for 10 seconds.

.

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

• Barometric pressure sensor failed.

• Open or shorted barometric pressure sensor cir-

cuit, or loose connector.

• PCM failed.

AK200940

BAROMETRIC
PRESSURE
SENSOR

AB

CONNECTOR: B-48

B-48(B)

AK201038AK

CONNECTORS: D-134, D-135

PCM

D-134(GR) D-135(GR)