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Mitsubishi Outlander XL. Manual - part 278

｠

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 higher than
+12.5 percent for 5 seconds.

｠

Short-term fuel trim has continued to be higher than
+17.6 percent for 5 seconds.

Check Conditions

｠

Engine coolant temperature is higher than 100°C
(212°F) when the engine is started.

｠

Intake air temperature is higher than 60°C (140°F)
when the engine is started.

｠

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 higher than
+12.5 percent for 5 seconds.

｠

Short-term fuel trim has continued to be higher than
+17.6 percent for 5 seconds.

Check Conditions

｠

Engine coolant temperature is higher than 100°C
(212°F) when the engine is started.

｠

Intake air temperature is higher than 60°C (140°F)
when the engine is started.

｠

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 higher than
+12.5 percent for 5 seconds.

｠

Short-term fuel trim has continued to be higher than
+22.3 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.

｠

Short-term fuel trim has continued to be +25.0
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 2, 4, 6) failed.

｠

Incorrect fuel pressure.

｠

Air drawn in from gaps in gasket, seals, etc.

｠

Engine coolant temperature sensor failed.

｠

Intake air temperature sensor failed.

｠

Manifold absolute pressure sensor failed.

｠

Exhaust leak.

｠

Use of incorrect or contaminated fuel.

｠

Harness damage.

｠

Connector damage.

｠

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

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-307

DIAGNOSTIC TROUBLE CODE PROCEDURES

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.

｠

The intake air temperature and temperature shown with the
scan tool should approximately match.

(3)

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

Q:Is the sensor operating properly?

YES:

Go to Step 3.

NO:

Refer to DTC P0111 - Intake Air Temperature Circuit

Range/Performance Problem P.13Ab-143, DTC P0112 - Intake
Air Temperature Circuit Low Input P.13Ab-148, DTC P0113 -
Intake Air Temperature Circuit High Input P.13Ab-152.

STEP 3. Using scan tool MB991958, check data list item 6:
Engine Coolant Temperature Sensor.

(1)

Turn the ignition switch to the "ON" position.

(2)

Set scan tool MB991958 to the data reading mode for item
6, Engine Coolant Temperature Sensor.

｠

The engine coolant temperature and temperature shown
with the scan tool should approximately match.

(3)

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

Q:Is the sensor operating properly?

YES:

Go to Step 4.

NO:

Refer to DTC P0116 - Engine Coolant Temperature

Circuit Range/Performance Problem P.13Ab-158, DTC P0117 -
Engine Coolant Temperature Circuit Low Input P.13Ab-163,

13Ab-308

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

DIAGNOSTIC TROUBLE CODE PROCEDURES

DTC P0118 - Engine Coolant Temperature Circuit High
Input P.13Ab-168.

STEP 4. Using scan tool MB991958, check data list item 8:
Manifold Absolute Pressure Sensor.

(1)

Connect scan tool MB991958 to the data link connector.

(2)

Turn the ignition switch to the "ON" position.

(3)

Set scan tool MB991958 to the data reading mode for item
8, Manifold Absolute Pressure Sensor.

｠

When altitude is 0 m (0 foot), 101 kPa (29.8 in.Hg).

｠

When altitude is 600 m (1,969 feet), 95 kPa (28.1 in.Hg).

｠

When altitude is 1,200 m (3,937 feet), 88 kPa (26.0 in.Hg).

｠

When altitude is 1,800 m (5,906 feet), 81 kPa (23.9 in.Hg).

(4)

Start the engine.

｠

When the engine is idling, 16 - 36 kPa (4.7 - 10.6 in.Hg).

｠

When the engine is suddenly revved, manifold absolute
pressure varies.

(5)

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

Q:Is the sensor operating properly?

YES:

Go to Step 5.

NO:

Refer to DTC P0106 - Manifold Absolute Pressure

Circuit Range / Performance Problem P.13Ab-126DTC P0107 -
Manifold Absolute Pressure Circuit Low Input P.13Ab-132,
DTC P0108 -Manifold Absolute Pressure Circuit High
Input P.13Ab-138.

STEP 5. Check the fuel pressure.
Refer to On-vehicle Service - Fuel Pressure Test P.13Aa-17.

Q:Is the fuel pressure normal?

YES:

Go to Step 6.

NO:

Repair it. Then go to Step 13.

STEP 6. Check for harness connector B-115, B-116, B-120
at the left bank injector and harness connector B-10 at ECM
for damage.

Q:Is the harness connector in good condition?

YES:

Then go to Step 7.

NO:

Repair it. Refer to GROUP 00E, Harness Connector

Inspection P.00E-2. Then go to Step 13.

STEP 7. Check the left bank injector.

(1)

Disconnect the left bank injector connector B-115, B-116,
B-120.

ZK603186AA00

Injector side
connector

1 2

(2)

Measure the resistance between injector side connector
terminal No. 1 and No. 2.

｠

Standard value: 10.5 and 13.5 Ω [at 20°C (68°F)]

Q:Is the measured resistance between 10.5 and 13.5 ohms

[at 20°C (68°F)]?

YES:

Go to Step 8.

NO:

Replace the injector. Then go to Step 13.

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-309

DIAGNOSTIC TROUBLE CODE PROCEDURES

STEP 8. Check for harness between the left bank injector
connector B-115, B-116, B-120 and the ECM connector B-10.

(1)

Disconnect the left bank injector connector B-115, B-116,
B-120 and the ECM connector B-10.

(2)

Measure the resistance between the left bank injector
connector B-115, B-116, B-120 and the ECM connector
B-10.

ZK604082

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

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

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

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

B-115, B-116,B-120
harness connector:
component side

AA00

B-10 Harness
connector:
component side

　｠

Should be less than 2 ohms.

a
.

Connector B-115 (terminal No. 2) and connector B-10
(terminal No. 51) at No. 6 cylinder injector.

b
.

Connector B-116 (terminal No. 2) and connector B-10
(terminal No.19) at No. 4 cylinder injector.

c
.

Connector B-120 (terminal No. 2) and connector B-10
(terminal No. 3) at No. 2 cylinder injector.

Q:Is the harness wire in good condition?

YES:

Go to Step 9.

NO:

Repair it. Refer to GROUP 00E, Harness Connector

Inspection P.00E-2. Then go to Step 13.

STEP 9. Check for exhaust leak.

Q:Are there any abnormalities?

YES:

Repair it. Then go to Step 13.

NO:

Go to Step 10.

STEP 10. Check for intake system vacuum leak.

Q:Are there any abnormalities?

YES:

Repair it. Then go to Step 13.

NO:

Go to Step 11.

STEP 11. Check for entry of foreign matter (water, kerosene,
etc.) into fuel.

Q:Are there any abnormalities?

YES:

Replace the fuel. Then go to Step 13.

NO:

Go to Step 12.

STEP 12. Replace the left bank injector.

(1)

Replace the left 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 P0174 set?

13Ab-310

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

DIAGNOSTIC TROUBLE CODE PROCEDURES

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