Mitsubishi Montero (2002-2004). Manual - part 579

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-13

STEP 6. Measure the sensor supply voltage at volume 
airflow sensor harness side connector B-48.
(1) Disconnect the connector B-48 and measure at the harness 

side.

(2) Turn the ignition switch to the "ON" position.

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

•  Voltage should be between 4.8 and 5.2 volts.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 4.8 and 5.2 volts?

YES : Go to Step 9.
NO :  Go to Step 7.

STEP 7. Check connector D-134 at PCM for damage.
Q: Is the harness connector in good condition?

YES : Go to Step 8.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 13.

AK200937

3

4

5

1

2

6

7

AB

HARNESS 
CONNECTOR: 
COMPONENT SIDE

CONNECTOR: B-48

B-48(B)

AKX01406 AJ

B-48 HARNESS CONNECTOR: 
COMPONENT SIDE

1

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3

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7

AK201166

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CONNECTOR: D-134

AB

PCM

D-134(GR)

HARNESS CONNECTOR: 
COMPONENT SIDE

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-14

STEP 8. Check for short circuit to ground between volume 
airflow sensor connector B-48 (terminal No. 3) and PCM 
connector D-134 (terminal No. 63).
Q: Is the harness wire in good condition?

YES : Replace the PCM. Then go to Step 13.
NO :  Repair it. Then go to Step 13.

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

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-15

STEP 9. Check the continuity at volume airflow sensor 
harness side connector B-48.
(1) Disconnect the connector B-48 and measure at the harness 

side.

(2) Check for the continuity between terminal No. 5 and 

ground.

• Should be less than 2 ohms.

Q: Is the continuity normal?

YES : Go to Step 12.
NO :  Go to Step 10.

STEP 10. Check connector D-134 at PCM 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 13.

AK200937

3

4

5

1

2

6

7

AB

HARNESS 
CONNECTOR: 
COMPONENT SIDE

CONNECTOR: B-48

B-48(B)

AKX01409

1

2

3

4

5

6

7

B-48 HARNESS CONNECTOR: 
COMPONENT SIDE

AL

AK201166

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76

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85

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87

80

72

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81

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88

89

CONNECTOR: D-134

AB

PCM

D-134(GR)

HARNESS CONNECTOR: 
COMPONENT SIDE

TSB Revision

DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-16

STEP 11. Check for open circuit and harness damage 
between volume airflow 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 13.
NO :  Repair it. Then go to Step 13.

STEP 12. Check connector D-134 at PCM for damage.
Q: Is the connector in good condition?

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

13.

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

Connector Inspection 

P.00E-2

. Then go to Step 13.

AK200937

3

4

5

1

2

6

7

AB

HARNESS 
CONNECTOR: 
COMPONENT SIDE

CONNECTOR: B-48

B-48(B)

AK201166

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62

63

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76

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87

80

72

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81

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88

89

CONNECTOR: D-134

AB

PCM

D-134(GR)

HARNESS CONNECTOR: 
COMPONENT SIDE

AK201166

61

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80

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89

CONNECTOR: D-134

AB

PCM

D-134(GR)

HARNESS CONNECTOR: 
COMPONENT SIDE