Mitsubishi Montero (2002-2004). Manual — part 664

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-353

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

GROUP 13A, Procedure 6

− Other Monitor

P.13Ab-2

.

(3) Read in the diagnostic trouble code (DTC).
Q: Are DTC P0301, P0302, P0303, P0304, P0305 and P0306

sets?
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: Are DTC P0301, P0302, P0303, P0304, P0305 and P0306

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

AK200960

1

2

B-03(GR)

B-11(GR)

B-35(GR)

B-33(GR)

B-02(GR)

B-01(GR)

CONNECTORS: B-01, B-02, B-03, B-11,

B-33, B-35

AB

HARNESS CONNECTOR:
COMPONENT SIDE

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-354

DTC P0325: Knock Sensor 1 Circuit Malfunction

WHITE

BL

ACK

BL

ACK

AK201141

2

1

B-09

MU802661

KNOCK SENSOR

1

2

POWERTRAIN
CONTROL
MODULE (PCM)

89

Knock Sensor Circuit

61
656667686970 717273
74757677787980 8182
8384

858687

8889

62

6364

D-134

(MU803804)

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-355

.

CIRCUIT OPERATION

• The knock sensor sends a signal voltage to the

PCM (terminal No. 89).

.

TECHNICAL DESCRIPTION

• The knock sensor converts the vibration of the

cylinder block into a voltage and outputs it. If
there is a malfunction of the knock sensor, the
voltage output will not change.

• The PCM checks whether the voltage output

changes.

.

DTC SET CONDITIONS

Check Conditions

• 2 seconds or more have passed since the start-

ing sequence was completed.

• Engine speed is higher than 3,000 r/min.

Judgment Criteria

• Knock sensor output voltage (knock sensor peak

voltage in each 1/3 turn of the crankshaft) has not
changed more than 0.06 V in the last consecutive
200 periods.

.

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

• Knock sensor failed.

• Open or shorted knock sensor circuit, or loose

connector.

• PCM failed.

AK201279

CONNECTOR: B-09

B-09(GR)

KNOCK
SENSOR

AB

AK201038

CONNECTOR: D-134

AD

PCM

D-134(GR)

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-356

DIAGNOSIS

Required Special Tool:

• MB991502: Scan Tool (MUT-II)

STEP 1. Check harness connector B-09 at the knock
sensor for damage.
Q: Is the harness connector in good condition?

YES : Go to Step 2.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 6.

AK200961

1

2

CONNECTOR: B-09

B-09(GR)

KNOCK
SENSOR

AB

HARNESS
CONNECTOR:
COMPONENT SIDE