Mitsubishi Lancer (4A9 engine). Manual — part 2

AC509265

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 reassembly.

Operating procedures,
cautions, etc. on removal,
installation, disassembly and
reassembly 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.

AF

BRAKE CALIPER ASSEMBLY

35A-21

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 compo-
nent parts or on the page following the component
parts page. The symbols do not always have accomp-
anying text to support that symbol.

: Grease
(Multi-purpose grease unless there is a brand
or type specified)
: Sealant or adhesive
: Automatic transmission fluid, brake fluid, power
steering fluid or air conditioning compressor oil
: Engine oil or gear oil
: Adhesive tape or butyl rubber tape

HOW TO USE THIS MANUAL

GENERAL

00-5

HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS

GENERAL

00-6

HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE

POINTS

CONTENTS OF TROUBLESHOOTING

M1001013300868

CAUTION

During diagnosis, a diagnosis code associated
with other system may be set when the ignition
switch is turned on with connector(s) discon-
nected. On completion, confirm all systems for
diagnosis code(s). If diagnosis code(s) are set,
erase them all.

WARNING

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-ECU, and activates
the radiator fan to prevent overheating as
fail-safe.

Troubleshooting of electronic control systems for
which the M.U.T.-III can be used follows the basic
outline described below. Even in systems for which
the M.U.T.-III cannot be used, some of these sys-
tems still follow this outline.

1. STANDARD FLOW OF DIAGNOSIS 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.

HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS

GENERAL

00-7

Diagnosis method

AC311722

Gathering information
from the customer.

Check trouble symptom.

Reoccurs

Does not reoccur

CAN bus diagnosis chart*

CAN bus diagnosis*

Read the diagnosis code.

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 CHART
FOR DIAGNOSIS CODES
(Refer to applicable group).

How to treat past
trouble*

Refer to the INSPECTION CHART
FOR TROUBLE SYMPTOMS
(Refer to applicable group).

INTERMITTENT MALFUNCTIONS

*

Diagnosis code
displayed.
(Current trouble)*

Diagnosis code
displayed.
(Current trouble)*

No diagnosis
code.

No diagnosis
code.

Diagnosis code
displayed.
(Past trouble)*

Diagnosis code
displayed.
(Past trouble)*

No diagnosis code
or communication
with MUT-III not
possible

Diagnosis code
displayed.

OK

NG

2

1

3

3

3

3

4

4

5

• *

1

: For how to diagnose CAN bus lines, refer to GROUP 54C .

• *

2

: For the CAN bus diagnosis chart, refer to GROUP 54C .

• *

3

: When the M.U.T.-III detects a diagnosis 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.00-15

.

• *

5

: For how to cope with intermittent malfunctions, refer to

P.00-14

.

2. SYSTEM OPERATION AND SYMPTOM
VERIFICATION TESTS

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

3. DIAGNOSIS FUNCTION

Details specific to individual systems are described.

4. DIAGNOSIS CODE CHART

Diagnostic trouble codes and diagnostic items are
shown.

5. DIAGNOSIS CODE PROCEDURES

Indicates the inspection procedures corresponding to
each diagnosis code (Refer to How to Use Inspection
Procedures

P.00-10

).

6. TROUBLE SYMPTOM CHART

If there are trouble symptoms even though the
M.U.T.-III does not find any diagnosis codes, Inspec-
tion procedures for each trouble symptom will be
found by means of this chart.

HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS

GENERAL

00-8

7. SYMPTOM PROCEDURES

Indicates the inspection procedures corresponding to
each symptom classified in the Symptom Chart
(Refer to How to Use Inspection Procedures

P.00-

10

).

8. SERVICE DATA REFERENCE TABLE

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

9. ACTUATOR TEST TABLE

The Actuator Test item numbers, inspection items,
and judgment values have been provided in this
chart as reference information.

10. CHECK AT ECU TERMINALS

Terminal numbers for the ECU connectors, inspec-
tion items, and judgment values have been provided
in this chart as reference information.

11. INSPECTION PROCEDURE BY USING
AN OSCILLOSCOPE

When there are inspection procedures using an
oscilloscope, these are described here.

DIAGNOSIS FUNCTION

M1001013400917

The diagnosis function retrieves diagnosis code and
service data by M.U.T.-III and enables the perform-
ance of the actuator test.

• DIAGNOSIS CODE

• Data list output

• Actuator test

• Diagnosis deletion using M.U.T.-III

• Freeze frame data

• Status indication by diagnosis code

• ECU information display

NOTE: If a diagnosis code is set, the "status indica-
tion by diagnosis code" informs users whether a
mechanical problem currently exists (current trouble)
or whether it existed before but normal operation has
been restored (past trouble).

HOW TO READ DIAGNOSIS CODE

CAUTION

Before connecting or disconnecting the M.U.T.-
III, turn the ignition switch to the "LOCK" (OFF)
position.

AC608435

MB991827

MB991824

MB991910

AB

Diagnosis connector

<LH drive vehicles>

AC700191

MB991827

MB991824

AB

Diagnosis connector

<RH drive vehicles>

MB991910

Connect the M.U.T.-III to the 16-pin diagnosis con-
nector, and read the diagnosis code.