Mitsubishi Outlander XL. Manual — part 401

STEP 6. Check the spark plugs.
Refer to GROUP 16, Ignition System - On-vehicle service -
Spark Plug Check P.16c-4.

Q:Are there any abnormalities?

YES:

Replace the spark plug. Then confirm that the

malfunction symptom is eliminated.

NO:

Go to Step 7.

STEP 7. Check the ignition coil.

(1)

Remove the intake manifold.

(2)

Refer to GROUP 16, Ignition System - On-vehicle service -
Ignition Coil Check P.16c-3.

Q:Are there any abnormalities?

YES:

Replace the ignition coil. Then confirm that the

malfunction symptom is eliminated.

NO:

Go to Step 8.

STEP 8. Check the compression pressure.
Refer to GROUP 11A, On-vehicle service - Compression
Pressure Check P.11A-17.

Q:Is the compression pressure normal?

YES:

Go to Step 9.

NO:

Repair it. Then confirm that the malfunction symptom

is eliminated.

STEP 9. Check the positive crankcase ventilation valve.
Refer to GROUP 17, Emission Control System - Positive
Crankcase Ventilation Check P.17c-8.

Q:Is the positive crankcase ventilation valve?

YES:

Go to Step 10.

NO:

Repair it. Then confirm that the malfunction symptom

is eliminated.

STEP 10. Check the purge control system.
Refer to GROUP 17, Emission Control System - Purge Control
System Check (Purge Flow Check) P.17c-11.

Q:Is the purge control system normal?

YES:

Check the following items, and repair or replace the

defective items.

a
.

Check if the injectors are clogged.

Then confirm that the malfunction symptom is eliminated.

NO:

Repair it. Then confirm that the malfunction symptom

is eliminated.

INSPECTION PROCEDURE 18: Transient, Mass Emission Tailpipe Test Failure.

M11310100299USA0000010000

COMMENT

｠

The test is failed when the air/fuel ratio is not
controlled to the ideal air/fuel ratio. This occurs due

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-799

SYMPTOM PROCEDURES

to the feedback control by heated oxygen sensor
signals, insufficient EGR flow rate, or deteriorated
catalyst.

NOTE:

If the three-way catalyst temperature is

low when checking the exhaust gas, the three-way
catalyst cannot sufficiently clean the emissions.
Warm up the engine sufficiently before checking
the exhaust, and check immediately.

TROUBLESHOOTING HINTS (The most likely
causes for this case:)

｠

Malfunction of air/fuel ratio control system.

｠

Malfunction of the EGR system.

｠

Deteriorated catalyst.

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. Check the exhaust gas with the engine at normal
operating temperature.

Q:Was the exhaust gas checked with engine warmed

sufficiently?

YES:

Go to Step 2.

NO:

Check it again after enough warm up.

STEP 2. Check the following items.

(1)

Check the following items.

a
.

Check all vacuum hoses and connectors.

b
.

Check electrical wires and connectors for obvious
problems.

Q:Are they normal?

YES:

Go to Step 3.

NO:

Repair or replace it. Then confirm that the

malfunction symptom is eliminated.

STEP 3. Check the driveability.

Q:Is the driveability normal?

YES:

Go to Step 4.

NO:

Refer to Trouble Symptom Chart P.13Ab-49.

13Ab-800

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

SYMPTOM PROCEDURES

STEP 4. Using scan tool MB991958, read the diagnostic
trouble code (DTC).

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)

Turn the ignition switch to the "ON" position.

(3)

Read the DTC.

(4)

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

Q:Is any DTC set?

YES:

Refer to Diagnostic Trouble Code Chart P.13Ab-44.

NO:

Go to Step 5.

STEP 5. Check the ignition timing.
Refer to GROUP 11A, On-vehicle Service - Ignition Timing
Check P.11A-14.

Q:Is the ignition timing normal?

YES:

Go to Step 6.

NO:

Check that the crankshaft position sensor and timing

belt cover are in the correct position. Then confirm that
the malfunction symptom is eliminated.

STEP 6. Using scan tool MB991958, check data list.

(1)

Turn the ignition switch to the "ON" position.

(2)

Check the following items in the data list. Refer to Data List
Reference Table P.13Ab-837.

a
.

Item 06: Engine Coolant Temperature Sensor.

b
.

Item 05: Intake Air Temperature Sensor.

c
.

Item AC: Heated Oxygen Sensor Bank 1, Sensor 1 (right
front)

d
.

Item AE: Heated Oxygen Sensor Bank 2, Sensor 1 (left
front)

e
.

Item BB: Barometric Pressure Sensor

(3)

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

Q:Are they operating properly?

YES:

Go to Step 7.

NO:

Repair or replace it. Then confirm that the

malfunction symptom is eliminated.

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-801

SYMPTOM PROCEDURES

STEP 7. Using scan tool MB991958, check data list item AD:
Heated oxygen sensor bank 1, sensor 2 (right rear).

(1)

Start the engine and run at idle.

(2)

Set scan tool MB991958 to the data reading mode for item
AD, Heated Oxygen Sensor bank 1, sensor 2 (right rear).

a
.

Transaxle: "L" range

b
.

Drive with wide open throttle

c
.

Engine: 3,500 r/min

｠

The output voltages should be between 0.6 and 1.0
volt.

(3)

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

Q:Is the sensor operating properly?

YES:

Go to Step 8.

NO:

Refer to, P0137 - Heated Oxygen Sensor Circuit Low

Voltage (bank 1, sensor 2) P.13Ab-217, DTC P0138 - Heated
Oxygen Sensor Circuit High Voltage (bank 1, sensor 2) P.
13Ab-222, DTC P0139 - Heated Oxygen Sensor Circuit Slow
Response (bank 1, sensor 2) P.13Ab-226, DTC P0140 - Heated
Oxygen Sensor Circuit No Activity Detected (bank 1,
sensor 2) P.13Ab-230.

STEP 8. Using scan tool MB991958, check data list item AF:
Heated oxygen sensor bank 2, sensor 2 (left rear).

(1)

Start the engine and run at idle.

(2)

Set scan tool MB991958 to the data reading mode for item
AF, Heated Oxygen Sensor bank 2, sensor 2 (left rear).

a
.

Transaxle: "L" range

b
.

Drive with wide open throttle

c
.

Engine: 3,500 r/min

｠

The output voltage should be between 0.6 and 1.0 volt.

(3)

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

Q:Is the sensor operating properly?

YES:

Go to Step 9.

NO:

Refer to, P0157 - Heated Oxygen Sensor Circuit Low

Voltage (bank 2, sensor 2) P.13Ab-275, DTC P0158 - Heated
Oxygen Sensor Circuit High Voltage (bank 2, sensor 2) P.
13Ab-280, DTC P0159 - Heated Oxygen Sensor Circuit Slow
Response (bank 2, sensor 2) P.13Ab-284, DTC P0160 - Heated
Oxygen Sensor Circuit No Activity Detected (bank 2,
sensor 2) P.13Ab-288.

STEP 9. Check the EGR system.
Refer to GROUP 17, Emission Control System - General
Description (EGR System) P.17c-13.

Q:Is the EGR system normal?

YES:

Go to Step 10.

13Ab-802

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

SYMPTOM PROCEDURES