Mitsubishi Outlander XL. Manual — part 276

ZK604078

M

1

2

16

15 14 13 12 11 10 9 8 7 6 5 4 3

2

1

32

31 30 29 28 27 26 25 24 23 22 21 20 19 18

17

48

47 46 45 44 43 42 41 40 39 38 37 36 35 34

33

64

63 62 61 60 59 58 57 56 55 54 53 52 51 50

49

B-101, B-103, B-104,
harness connector:
component side

AA00

B-10 Harness
connector:
component side

(3)

Measure the resistance between the right bank injector
connector B-101, B-103, B-104 and the ECM connector
B-10.

a

.

Connector B-101 (terminal No. 2) and connector B-10
(terminal No. 2) at No. 1 cylinder injector.

b
.

Connector B-103 (terminal No. 2) and connector B-10
(terminal No. 18) at No. 3 cylinder injector.

c
.

Connector B-104 (terminal No. 2) and connector B-10
(terminal No.50) at No. 5 cylinder injector.

｠

Should be less than 2 ohms.

Q:Is the harness wire in good condition?

YES:

Go to Step 12.

NO:

Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection P.00E-2. Then go to Step 16.

STEP 12. Check for exhaust leaks.

Q:Are there any abnormalities?

YES:

Repair it. Then go to Step 16.

NO:

Go to Step 13.

STEP 13. Check for intake system vacuum leak.

Q:Are there any abnormalities?

YES:

Repair it. Then go to Step 16.

NO:

Go to Step 14.

STEP 14. Check for entry of foreign matter (water, kerosene,
etc.) into fuel.

Q:Are there any abnormalities?

YES:

Replace the fuel. Then go to Step 16.

NO:

Go to Step 15.

STEP 15. Replace the right bank injector.

(1)

Replace the right bank injector.

(2)

Carry out a test drive with the drive cycle pattern. Refer to
Diagnostic Function - OBD-II Drive Cycle - Pattern 22 P.
13Ab-8.

(3)

Check the diagnostic trouble code (DTC).

Q:Is DTC P0171 set?

YES:

Replace the ECM. When the ECM is replaced, register

the ID code. Refer to GROUP 42B, ID Code Registration
Judgment Table <Vehicles with KOS> P.42B-12or GROUP
42C, ID Code Registration Judgment Table <Vehicles with
WCM> P.42C-8. Then go to Step 16.

NO:

The inspection is complete.

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-299

DIAGNOSTIC TROUBLE CODE PROCEDURES

STEP 16. Test the OBD-II drive cycle.

(1)

Carry out a test drive with the drive cycle pattern. Refer to
Diagnostic Function - OBD-II Drive Cycle - Pattern 22 P.
13Ab-8.

(2)

Check the diagnostic trouble code (DTC).

Q:Is DTC P0171 set?

YES:

Retry the troubleshooting.

NO:

The inspection is complete.

DTC P0172: System too Rich (bank 1)

M11310100203USA0000010000

Fuel Trim Circuit

｠

Refer to DTC P0201- Injector Circuit - Cylinder 1 P.
13Ab-332, P0203- Injector Circuit - Cylinder 3 P.
13Ab-347, P0205- Injector Circuit - Cylinder 5 P.
13Ab-362.

CIRCUIT OPERATION

｠

Refer to DTC P0201- Injector Circuit - Cylinder 1 P.
13Ab-332, P0203- Injector Circuit - Cylinder 3 P.
13Ab-347, P0205- Injector Circuit - Cylinder 5 P.
13Ab-362.

TECHNICAL DESCRIPTION

｠

If a malfunction occurs in the fuel system, the fuel
trim value becomes too small.

｠

The ECM checks whether the fuel trim value is
within a specified range.

DESCRIPTIONS OF MONITOR METHODS
Right bank air/fuel learning value (long time fuel trim)
and air/fuel feedback integral value (short time fuel
trim) are too rich.

MONITOR EXECUTION

Continuous

MONITOR EXECUTION CONDITIONS (Other
monitor and Sensor)

Other Monitor (There is no temporary DTC stored in
memory for the item monitored below)

｠

Misfire monitor

Sensor (The sensor below is determined to be
normal)

｠

Mass airflow sensor

｠

Engine coolant temperature sensor

｠

Intake air temperature sensor

｠

Barometric pressure sensor

｠

Throttle position sensor

13Ab-300

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

DIAGNOSTIC TROUBLE CODE PROCEDURES

DTC SET CONDITIONS

Logic Flow Chart

K

L rn

: Long-te rm trim

K

I

: Sho rt-te rm trim

K0

: Maxi m um limit of long-te rm trim

K1

: Maxi m um limit of sho rt-te rm trim

K2

: Mini m um limit of long-te rm trim

K3

: Mini m um limit of sho rt-te rm trim

Start

Monitoring

conditions

End

No

No

No

No

No

No

Yes

Yes

Yes

Yes

Yes

Yes

K

L rn

> K0

Malfunction

Good

K

L rn

< K

2

K

I

< K

3

K

I

> K

1

Conti nuous failur e

for 2sec s

ZK603728 AA00

Check Conditions

｠

Under the closed loop air/fuel ratio control.

｠

Engine coolant temperature is higher than 76°C
(169°F).

｠

Mass airflow sensor output is 12 g/sec or more.

Judgement Criterion

｠

Long-term fuel trim has continued to be lower than
-12.5 percent for 5 seconds.

or

｠

Short-term fuel trim has continued to be lower than
-7.4 percent for 5 seconds.

Check Conditions

｠

Under the closed loop air/fuel ratio control.

｠

Engine coolant temperature is higher than 76°C
(169°F).

｠

Mass airflow sensor output is 12 g/sec or less.

Judgement Criterion

｠

Long-term fuel trim has continued to be lower than
-12.5 percent for 5 seconds.

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-301

DIAGNOSTIC TROUBLE CODE PROCEDURES

or

｠

Short-term fuel trim has continued to be lower than
-12.5 percent for 5 seconds.

Check Conditions

｠

Engine coolant temperature is higher than 76°C
(169°F).

｠

Under the closed loop air/fuel ratio control.

Judgement Criterion

｠

Long-term fuel trim has continued to be -12.5
percent for 2 seconds.

or

｠

Short-term fuel trim has continued to be -50.0
percent for 2 seconds.

OBD-II DRIVE CYCLE PATTERN

Refer to Diagnostic Function - OBD-II Drive Cycle -
Pattern 22 P.13Ab-8.

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

｠

Mass airflow sensor failed.

｠

Injector (Number 1, 3, 5) failed.

｠

Incorrect fuel pressure.

｠

Engine coolant temperature sensor failed.

｠

Intake air temperature sensor failed.

｠

Manifold absolute pressure sensor failed.

｠

ECM failed.

DIAGNOSIS

Required Special Tools:

｠

MB991958: Scan Tool (M.U.T.-III Sub Assembly)

｠

MB991824: V.C.I.

｠

MB991827: USB Cable

｠

MB991910: Main Harness A

STEP 1. Using scan tool MB991958, check data list item 10:
Mass Airflow Sensor.

ZC501967

AC404789

ZC5019680000

MB991824

MB991827

MB991910

Data link

connector

To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991958.

(1)

Connect scan tool MB991958 to the data link connector.

(2)

Start the engine and run at idle.

(3)

Set scan tool MB991958 to the data reading mode for item
10, Mass Airflow Sensor.

(4)

Warm up the engine to normal operating temperature: 80°C
to 95°C (176°F to 203°F).

｠

When idling, between 1,350 and 1,670 millivolts.

｠

When 2,500 r/min, between 1,620 and 2,020 millivolts.

(5)

Turn the ignition switch to the "LOCK" (OFF) position.

Q:Is the sensor operating properly?

YES:

Go to Step 2.

NO:

Refer to DTC P0101 - Mass Airflow Circuit Range/

Performance Problem P.13Ab-108, DTC P0102 - Mass Airflow
Circuit Low Input P.13Ab-115, DTC P0103 - Mass Airflow
Circuit High Input P.13Ab-121.

STEP 2. Using scan tool MB991958, check data list item 5:
Intake Air Temperature Sensor.

(1)

Turn the ignition switch to the "ON" position.

(2)

Set scan tool MB991958 to the data reading mode for item
5, Intake Air Temperature Sensor.

13Ab-302

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

DIAGNOSTIC TROUBLE CODE PROCEDURES