Mitsubishi Evolution X. Manual — part 309

HOW TO USE TROUBLESHOOTING/ INSPECTION SERVICE POINTS

TSB Revision

GENERAL

00-11

HARNESS INSPECTION

Check for an open or short circuit in the harness
between the terminals which were faulty according to
the connector measurements. Carry out this inspec-
tion while referring to GROUP 00E, Harness Con-
nector Inspection

P.00E-2

. Here, "Check harness

between power supply and terminal xx" also includes
checking for blown fuse. For inspection service
points when there is a blown fuse, refer to "Inspec-
tion Service Points for a Blown Fuse

P.00-17

."

MEASURES TO TAKE AFTER
REPLACING THE ECU

If the trouble symptoms have not disappeared even
after replacing the ECU, repeat the inspection proce-
dure from the beginning.

AC210616

(5) Explains about technical details.

(6) Describes the conditions for that DTC
being set (stored).

(8) Start of the diagnosis procedure
for that DTC.

(10) Provides the inspection procedure
for that DTC step by step.

(7) Describes possible
cause(s)for that DTC.

AD

(9) Identifies the special tool(s)
necessary for diagnosing that DTC.

Data link
connector

Required special tool:

HOW TO USE TROUBLESHOOTING/ INSPECTION SERVICE POINTS

TSB Revision

GENERAL

00-12

CONNECTOR MEASUREMENT SERVICE POINTS

M1001013600610

Turn the ignition switch to the "LOCK" (OFF) position when
connecting and disconnecting the connectors. Turn the ignition
switch to "ON" when measuring, unless there are instructions
to the contrary.

IF INSPECTING WITH THE CONNECTOR
CONNECTED <WATERPROOF CONNECTORS>

Be sure to use special tool. Never insert a test probe from the
harness side, as this will reduce the waterproof performance
and result in corrosion.

IF INSPECTING WITH THE CONNECTOR
CONNECTED <ORDINARY (NON-WATERPROOF)
CONNECTORS>

Required Special Tool:

• MB992006: Extra Fine Probe

Inspect by inserting a test probe from the harness side. If the
connector is too small to insert a test probe (e.g. control unit
connector), do not insert it forcibly. Use special tool MB992006
(extra fine probe).

IF INSPECTING WITH THE CONNECTOR
DISCONNECTED

<When Inspecting a Female Pin>

• From front side of the connector

Required Special Tool:
MB991219: Inspection Harness (Included in MB991223,

Harness Set)

ACX00863AF

SPECIAL TOOL

Special tool

AC105598

MB992006

AG

HOW TO USE TROUBLESHOOTING/ INSPECTION SERVICE POINTS

TSB Revision

GENERAL

00-13

The inspection harness for connector pin contact pres-
sure should be used. The test probe should never be
forcibly inserted, as it may cause a defective contact.

• From back side of the connector (SRS-ECU harness side

connector)
Since the SRS-ECU harness connector is plated to improve

conductivity, observe the warning below when checking
this connector.

WARNING

Insert the backprobing tool into the connector from
the harness side, and connect the tester to the back-
probing tool. If any tool other than the backprobing
tool is used, it may cause damage to the harness and
other components. Furthermore, measurement
should not be carried out by touching the backprob-
ing tool directly against the terminals from the front
of the connector. The terminals are plated to increase
their conductivity, so that if they are touched directly
by the backprobing tool, the plating may break, which
will decrease reliability.

<When Inspecting a Male Pin>

CAUTION

At this time, be careful not to short the connector pins with
the test probes. Doing so may damage the circuits inside
the ECU.
Touch the pin directly with the test probe.

ACX00865 AB

MB991219

AC001607

SRS-ECU
harness connector

AC

ACX00867 AB

HOW TO USE TROUBLESHOOTING/ INSPECTION SERVICE POINTS

TSB Revision

GENERAL

00-14

CONNECTOR INSPECTION SERVICE POINTS

M1001013700424

VISUAL INSPECTION

• Connector is disconnected or improperly connected

• Connector pins are pulled out

• Stretched an broken wires at terminal section

• Low contact pressure between male and female terminals

• Low connection pressure due to rusted terminals or foreign

matter lodged in terminals

.

CONNECTOR PIN INSPECTION

If the connector pin stopper is damaged, the terminal connec-
tions (male and female pins) will not be perfect even when the
connector body is connected, because the pins may pull out of
the back side of the connector. Therefore, gently pull the wires
one by one to make sure that no pins pull out of the connector.

.

ACX00868AE

Good

Bad

Connector disconnected or
improperly connected

Stretched or broken wires

Low contact
pressure

Harness wire breakage
at terminal section

ACX00869AB