Mitsubishi Montero (2002-2004). Manual — part 655

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-317

STEP 11. 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 P0183 set?

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

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-318

DTC P0201: Injector Circuit Malfunction-Cylinder 1, DTC P0202: Injector Circuit Malfunction-Cylinder 2, DTC
P0203: Injector Circuit Malfunction-Cylinder 3, DTC P0204: Injector Circuit Malfunction- Cylinder 4, DTC P0205:
Injector Circuit Malfunction-Cylinder 5, DTC P0206: Injector Circuit Malfunction-Cylinder 6

WHITE-

BL

ACK

WHITE-

BL

ACK

RED

RED

RED

RED

RED

RED

AK201140

YELL

OW

-

BL

UE

YELL

OW

-

BL

UE

YELL

OW

-

RED

YELL

OW

-

RED

LIGHT GREEN

ORANGE

ORANGE

BL

UE

BL

UE

WHITE-

RED

WHITE-

RED

LIGHT GREEN

RED

RED

14

1 2
3 4

B-22X

3

2

4

1

MFI
RELAY

8

7

6

5

1 2 3 4

B-44

MU802609

1

1

1

1

21

1

2

1

6

POWERTRAIN
CONTROL
MODULE (PCM)

2

2

2

2

2

2

2

1

7

6

5

5

BATTERY

1 2

B-35

(MU802047)

1 2

B-11

(MU802047)

2

1

B-03

(MU802047)

INJECTOR
No. 3

INJECTOR
No. 4

INJECTOR
No. 5

INJECTOR
No. 6

1 2

B-01

(MU802047)

2

1

B-33

(MU802047)

1 2

B-02

(MU802047)

1

INJECTOR
No. 2

3

INJECTOR
No. 1

8

Injector Circuit

1

2

3

5

6 7 8 9

4

20

21 22

232425

2627

10111213

14 15

16 1718

19

D-132

(MU803802)

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-319

.

CIRCUIT OPERATION

• The injector power is supplied from the MFI relay

(terminal No. 1).

• The PCM controls the injector by turning the

power transistor in the PCM "ON" and "OFF".

.

TECHNICAL DESCRIPTION

• The amount of fuel injected by the injector is con-

trolled by the amount of continuity time the coil is
grounded by the PCM.

• A surge voltage is generated when the injectors

are driven and the current flowing to the injector
coil is shut off.

• The PCM checks this surge voltage.

.

DTC SET CONDITIONS

Check Conditions

• Engine speed is lower than 1,000 r/min.

• Throttle position sensor output voltage is lower

than 1.16 volts.

Judgment Criteria

• Injector coil surge voltage (battery positive volt-

age + 2 volts) has not been detected for 2 sec-
onds.

.

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

• Injector failed.

• Open or shorted injector circuit, or loose connec-

tor.

• PCM failed.

AK201039

MFI RELAY

B-22X

AB

CONNECTOR: B-22X

AK201038

CONNECTOR: D-132

AB

PCM

D-132(GR)

AK201056

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

AK201050

B-44(B)

AB

CONNECTOR: B-44

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DIAGNOSTIC TROUBLE CODE PROCEDURES

13Ac-320

DIAGNOSIS

Required Special Tools:

• MB991502: Scan Tool (MUT-II)

• MB991474: Test Harness

STEP 1. Using scan tool MB991502, check actuator test
item 01, 02, 03, 04, 05, 06: Injectors.

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Start the engine and run at idle.
(3) Set scan tool MB991502 to the actuator testing mode for

item 01, 02, 03, 04, 05, 06, Injectors.

(4) Warm up the engine to normal operating temperature: 80

°C

to 95

°C (176°F to 203°F).

• Does the idle state worsen when the injector is cut off?

(Does idling become unstable or does the engine stall?)

(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the actuator operating properly?

YES : It can be assumed that this malfunction is intermittent.

Refer to GROUP 00, How to Use Troubleshooting/
Inspection Service Points

P.00-6

.

NO : Go to Step 2.

STEP 2. Check harness connector B-44 at injector
intermediate connector for damage.
Q: Is the harness connector in good condition?

YES : Go to Step 3.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 17.

ACX01539

16-PIN

MB991502

AC

AK200949

3

4

7

8

1

2

5

6

B-44(B)

CONNECTOR: B-44

AB

HARNESS
CONNECTOR:
COMPONENT SIDE