Mitsubishi Eclipse. Manual — part 717

HOW TO USE TROUBLESHOOTING/ INSPECTION SERVICE POINTS

TSB Revision

GENERAL

00-11

• 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
backprobing tool. If any tool other than the
backprobing tool is used, it may cause damage to the
harness and other components. Furthermore, mea-
surement should not be carried out by touching the
backprobing 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. To do so may damage the circuits inside
the ECU.
Touch the pin directly with the test probe.

ACX00865 AB

MB991219

AC001607

SRS-ECU HARNESS
CONNECTOR

AB

ACX00867 AB

HOW TO USE TROUBLESHOOTING/ INSPECTION SERVICE POINTS

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GENERAL

00-12

CONNECTOR INSPECTION SERVICE POINTS

.

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.

.

CONNECTOR ENGAGEMENT INSPECTION

Required Special Tool:
MB991219: Inspection Harness (contained in MB991223 Test

Harness)

ACX00868AC

CONNECTOR DISCONNECTED OR
IMPROPERLY CONNECTED

STRETCHED OR BROKEN WIRES

HARNESS WIRE BREAKAGE
AT TERMINAL SECTION

LOW CONTACT
PRESSURE

GOOD

BAD

ACX00869AB

HOW TO USE TROUBLESHOOTING/ INSPECTION SERVICE POINTS

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GENERAL

00-13

Use special tool, MB991219 to inspect the engagement of the
male pins and female pins. [Pin drawing force: 1 N (0.2 pound)
or more]

HOW TO COPE WITH INTERMITTENT
MALFUNCTIONS

Most intermittent malfunctions occur under certain
conditions. If those conditions can be identified, the
cause will be easier to find.

.

TO COPE WITH INTERMITTENT MALFUNCTION;
1. Ask the customer about the malfunction
Ask what it feels like, what it sounds like, etc. Then
ask about driving conditions, weather, frequency of
occurrence, and so on.

.

2. Determine the conditions from the customer's
responses
Typically, almost all intermittent malfunctions occur
from conditions like vibration, temperature and/or
moisture change, poor connections. From the cus-
tomer's responses, it should be reasoned which con-
dition is most likely.

.

3. Use simulation test
In the cases of vibration or poor connections, use the
simulation tests below to attempt to duplicate the
customer's complaint. Determine the most likely cir-
cuit(s) and perform the simulation tests on the con-
nectors and parts of that circuit(s). Be sure to use the
inspection procedures provided for diagnostic trouble
codes and trouble symptoms.
For temperature and/or moisture condition related
intermittent malfunctions, try to change the condi-
tions of the suspected circuit components, then use
the simulation tests below.

.

4. Verify the intermittent malfunction is
eliminated
Repair the malfunctioning part and try to duplicate
the condition(s) again to verify the intermittent mal-
function has been eliminated.

ACX00870 AB

MB991219

HOW TO USE TROUBLESHOOTING/ INSPECTION SERVICE POINTS

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GENERAL

00-14

.

SIMULATION TESTS
NOTE: In case of difficulty in finding the cause of the intermit-
tent malfunction, the data recorder function in the scan tool is
effective.
For these simulation tests, shake, then gently bend, pull, and
twist the wiring of each of these examples to duplicate the inter-
mittent malfunction.

• Shake the connector up-and-down, and right-and-left.

• Shake the wiring harness up-and-down, and right-and-left.

Especially, check the splice points of wiring harnesses care-
fully. Refer to GROUP 00E, Harness Connector Inspection

P.00E-2

.

• Vibrate the part or sensor.

ACX00871 AB