Mitsubishi Montero (2002-2004). Manual — part 577

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-5

STEP 3. Check connector B-48 at volume airflow sensor
and connector D-133 at PCM for damage.
Q: Is the connector in good condition?

YES : Go to Step 4.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 9.

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HARNESS
CONNECTOR:
COMPONENT SIDE

CONNECTOR: B-48

B-48(B)

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CONNECTOR: D-133

HARNESS CONNECTOR:
COMPONENT SIDE

PCM

D-133(GR)

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DIAGNOSTIC TROUBLE CODE PROCEDURES

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STEP 4. Check for short circuit to ground between volume
airflow sensor connector B-48 (terminal No. 7) and PCM
connector D-133 (terminal No. 37).
Q: Is the harness wire in good condition?

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

9.

NO : Repair it. Then go to Step 9.

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HARNESS
CONNECTOR:
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CONNECTOR: B-48

B-48(B)

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CONNECTOR: D-133

HARNESS CONNECTOR:
COMPONENT SIDE

PCM

D-133(GR)

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DIAGNOSTIC TROUBLE CODE PROCEDURES

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STEP 5. Measure the reset signal voltage at volume airflow
sensor connector B-48 by backprobing.
(1) Do not disconnect the connector B-48.
(2) Start the engine and run at idle.

(3) Measure the voltage between terminal No. 7 and ground by

backprobing.

• When the engine idling, voltage should be 1.0 volt or

less.

• When the engine speed is 3,000 r/min, voltage should

be between 6.0 and 9.0 volts.

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

YES : Go to Step 8.
NO : Go to Step 6.

STEP 6. Check connector B-48 at volume airflow sensor
and connector D-133 at PCM for damage.
Q: Is the connector in good condition?

YES : Go to Step 7.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 9.

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HARNESS
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CONNECTOR: B-48

B-48(B)

AKX01515

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AKX01515

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B-48 HARNESS
CONNECTOR:
HARNESS SIDE

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CONNECTOR: B-48

B-48(B)

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CONNECTOR: D-133

HARNESS CONNECTOR:
COMPONENT SIDE

PCM

D-133(GR)

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DIAGNOSTIC TROUBLE CODE PROCEDURES

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STEP 7. Check for open circuit and harness damage
between volume airflow sensor connector B-48 (terminal
No. 7) and PCM connector D-133 (terminal No. 37).
Q: Is the harness wire in good condition?

YES : Replace the PCM. Then go to Step 9.
NO : Repair it. Then go to Step 9.

STEP 8. Replace the volume airflow sensor.
(1) Replace the volume airflow sensor.
(2) Carry out a test drive with the drive cycle pattern. Refer to

GROUP 13A, Procedure 6

− Other Monitor

P.13Ab-2

.

(3) Check the diagnostic trouble code (DTC).
Q: Is DTC P0101 set?

YES : Replace the PCM. Then go to Step 9.
NO : The inspection is complete.

STEP 9. 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 P0101 set?

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

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HARNESS
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CONNECTOR: B-48

B-48(B)

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CONNECTOR: D-133

HARNESS CONNECTOR:
COMPONENT SIDE

PCM

D-133(GR)

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CONNECTOR: B-48

B-48(B)