Mitsubishi Outlander XL. Manual — part 49

Classifications of major maintenance / service points

When there are major points relative to maintenance and servicing procedures (such as essential maintenance
and service points, maintenance and service standard values, information regarding the use of special tools, etc.).
These are arranged together as major maintenance and service points and explained in detail.

<<A>> : Indicates that there are essential points for removal or disassembly.
>>A<< : Indicates that there are essential points for installation or assembly.

Operating procedures,
cautions, etc. on removal,
installation, disassembly and
assembly are described

The title of the page
(following the page on which
the diagram of component
parts is presented) indicating
the locations of lubrication and
sealing procedures.

Indicates (by symbols) where
lubrication is necessary.

Symbols for lubrication, sealants and adhesives

Symbols are used to show the locations for lubrication
and for application of sealants and adhesives.
These symbols are included in the diagram of
component parts or on the page following the
component parts page. The symbols do not always
have accompanying text to support that symbol.

Adhesive tape or butyl rubber tape

Grease
(Multi-purpose grease unless there is a
brand or type specified)

Sealant or adhesive
Brake fluid or automatic transmission fluid

Engine oil, gear oil or air conditioning
compressor oil

Grease: repair kit grease

ZC6012880000

GENERAL <BODY AND CHASSIS>

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HOW TO USE THIS MANUAL

TROUBLESHOOTING GUIDELINES

M10001000088USA0000010001

VERIFY THE COMPLAINT

｠

Make sure the customer's complaint and the service
writer's work order description are understood
before starting work.

｠

Make sure the correct operation of the system is
understood. Read the service manual description to
verify normal system operation.

｠

Operate the system to see the symptoms. Look for
other symptoms that were not reported by the
customer, or on the work order, that may be related
to the problem.

DETERMINE POSSIBLE CAUSES

Compare the confirmed symptoms to the diagnostic
symptom indexes to find the right diagnosis
procedure.
If the confirmed symptoms cannot be found on any
symptom index, determine other possible causes.

｠

Analyze the system diagrams and list all possible
causes for the problem symptoms.

｠

Rank all these possible causes in order of
probability, based on how much of the system they
cover, how likely they are to be the cause, and how
easy they will be to check. Be sure to take
experience into account. Consider the causes of
similar problems seen in the past. The list of causes
should be ranked in order from general to specific,
from most-likely to least-likely, and from easy-to-
check to hard-to-check.

FIND THE PROBLEM

After the symptoms have been confirmed, and
probable causes have been identified, the next step

is to make step-by-step checks of the suspected
system components, junctions, and links in logical
order.
Use the diagnostic procedures in the service manual
whenever possible. Follow these procedures carefully
to avoid missing an important step in the diagnosis
sequence. It might be the skipped step that leads to
the solution of the problem.
If the service manual doesn't have step-by-step
procedures to help diagnose the problem, make a
series of checks based on the ranked list of probable
causes. Troubleshooting checks should be made in
the order that the list of causes was ranked:

｠

general to specific

｠

most-likely to least-likely

｠

easy-to-check to hard-to-check

REPAIR THE PROBLEM

When the step-by-step troubleshooting checks find a
fault, perform the proper repairs. Make sure to fix the
root cause of the problem, not just the symptom. Just
fixing the symptom, without fixing the root cause, will
cause the symptom to eventually return.

VERIFY THE REPAIR

After repairs are made, recheck the operation of the
system to confirm that the problem is eliminated. Be
sure to check the system thoroughly. Sometimes new
problems are revealed after repairs have been made.

HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS

TROUBLESHOOTING CONTENTS

M10001000133USA0000010001

The SRS-ECU adopts the rollover specification
that the curtain airbag and seat belt pre-tensioner
operate at the occurrence of rollover. Therefore,
do not tilt the vehicle to the right and left with the
IG ON or tilt the SRS-ECU to the right and left with
the IG ON and the harness installed.

During diagnosis, a diagnostic trouble code
associated with other system may be set when the

00-6

GENERAL <BODY AND CHASSIS>

TROUBLESHOOTING GUIDELINES

ignition switch is turned "ON" with connector(s)
disconnected. On completion, confirm all
systems for diagnostic trouble code(s). If
diagnostic trouble code(s) are set, erase them all.

Since the radiator fan rotates during CAN bus line
diagnostics, make sure that no one is servicing
the engine compartment before diagnosing the
CAN bus line. Since the CAN communication

stops when diagnosing the CAN bus line, the
ETACS-ECU detects the time-out of the engine
control module, and activates the radiator fan to
prevent overheating as fail-safe.
Troubleshooting of electronic control systems for
which scan tool MB991958 can be used follows the
basic outline described below. Even in systems for
which scan tool MB991958 cannot be used, some of
these systems still follow this outline.

1. STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING

Troubleshooting sections are based on the diagnostic
flow as below. If the diagnostic flow is different from
that given below, or if additional explanation is

required, the details of such differences or additions
will also be listed.

Diagnostic method

ZC604018

Gathering information
from the customer.

Check trouble symptom.

Reoccurs

Does not reoccur

CAN bus diagnosis chart*

CAN bus diagnosis*

Read the diagnosis code.

After taking note of the
malfunction code, erase the
diagnosis code memory.

Recheck trouble symptom.

Read the diagnosis codes.

How to treat past
trouble*

Refer to the INSPECTION CHA RT
FOR DI AGNOSIS CODES
(Re fer to applica ble g roup) .

How to treat past
trouble*

Refer to the INSPECTION CHA RT
FOR T ROUBLE SYMP TOMS
(Re fer to applica ble g roup) .

INTERMITTENT MALFUNCTIONS

Diagnosis code
displayed.
(Current trouble)*

No diagnosis
code.

Diagnosis code
displayed.
(Past trouble)*

No diagnosis
code or
communication
with scan tool
MB991958 not
possible

Diagnosis code
displayed.

Coding data check*

0000

｠

*1: For how to diagnose CAN bus lines, refer to
GROUP 54D P.54D-10.

｠

*2: For the CAN bus diagnosis chart, refer to
GROUP 54D P.54D-17.

GENERAL <BODY AND CHASSIS>

00-7

HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS

｠

*3: When scan tool MB991958 detects a diagnostic
trouble code, its display informs users whether a
mechanical problem currently exists or whether it
existed before. The message for the former state
identifies it as an "Active" and the message for the
latter identifies it as a "Stored".

｠

*4: For how to treat past trouble, refer to P.
00-17.

｠

*5: For how to cope with intermittent malfunctions,
refer to P.00-15.

｠

*6: For coding data, refer to P.00-34.

2. SYSTEM OPERATION AND SYMPTOM

VERIFICATION TESTS

If verification of the symptom(s) is difficult, procedures
for checking operation and verifying symptoms are
shown.

3. DIAGNOSTIC FUNCTION

The following trouble code diagnosis are shown.

｠

How to read diagnostic trouble codes

｠

How to erase diagnostic trouble codes

｠

Input inspection service points

4. DIAGNOSTIC TROUBLE CODE CHART

If the scan tool displays a diagnostic trouble code, find
the applicable inspection procedure according to this
chart.

5. SYMPTOM CHART

If there are symptoms, even though the scan tools
show that no DTCs are set, inspection procedures for
each symptom will be found by using this chart.

6. DIAGNOSTIC TROUBLE CODE

PROCEDURES

Indicates the inspection procedures corresponding to
each diagnostic trouble code. (Refer to P.00-9).

7. SYMPTOM PROCEDURES

Indicates the inspection procedures corresponding to
each symptom listed in the Symptom Chart. (Refer
to P.00-9).

8. SERVICE DATA REFERENCE TABLE

Inspection items and normal judgment values have
been provided in this chart as reference information.

9. CHECK AT ECU TERMINALS

Terminal numbers for the ECU connectors, inspection
items, and standard values have been provided in this
chart as reference information.

TERMINAL VOLTAGE CHECKS

Connect a needle-nosed wire probe to a voltmeter
probe.

Short-circuiting the positive (+) probe between a
connector terminal and ground could damage the
vehicle wiring, the sensor, the ECU, or all three.
Use care to prevent this!

Insert the needle-nosed wire probe into each of the
ECU connector terminals from the wire side, and
measure the voltage while referring to the check
chart.

NOTE:

Measure voltage with the ECU connectors

connected.You may find it convenient to pull out
the ECU to make it easier to reach the connector
terminals.Checks don't have to be carried out in
the order given in the chart.

If voltage readings differ from normal condition
values, check related sensors, actuators, and
wiring. Replace or repair as needed.

After repair or replacement, recheck with the
voltmeter to confirm that the repair has corrected
the problem.

TERMINAL RESISTANCE AND CONTINUITY
CHECKS

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

Disconnect the ECU connector.

If resistance and continuity checks are performed
on the wrong terminals, damage to the vehicle
wiring, sensors, ECU, and/or ohmmeter may
occur. Use care to prevent this!

Measure the resistance and check for continuity
between the terminals of the ECU harness-side
connector while referring to the check chart.

NOTE:

Checks don't have to be carried out in

the order given in the chart.

If the ohmmeter shows any deviation from the
Normal Condition value, check the corresponding
sensor, actuator and related electrical wiring, then
repair or replace.

After repair or replacement, recheck with the
ohmmeter to confirm that the repair has corrected
the problem.

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GENERAL <BODY AND CHASSIS>

HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS

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Mitsubishi Outlander XL. Manual — part 49

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