Mitsubishi Lancer Evolution IX. Manual — part 186

SPECIAL TOOLS

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-3

MB991813

A: MB991806
B: MB991812
C: MB991822

SWS monitor kit

A: SWS monitor

cartridge

B: SWS monitor

harness (for
column-ECU)

C: Probe harness

SWS communication line check
(ECU check and service data)

MB991529

Diagnosis code check
harness

Input signal check by using a
voltmeter

MB991223

a. MB991219
b. MB991220
c. MB991221
d. MB991222

Harness set

a. Check harness
b. LED harness
c. LED harness

adapter

d. Probe

Continuity check and voltage
measurement at harness wire or
connector

a. For checking connector pin

contact pressure

b. For checking power supply

circuit

c. For checking power supply

circuit

d. For connecting a locally

sourced tester

MB992006

Extra fine probe

Continuity check and voltage
measurement at harness wire or
connector

Tool

Number

Name

Use

B991813

A

B

C

MB991529

MB991223

a

d

c

b

DO NOT USE

BA

MB992006

TROUBLESHOOTING

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-4

TROUBLESHOOTING

PRIOR TO TROUBLESHOOTING

M1549014700505

Before carrying out troubleshooting, check the fol-
lowing two items.

• Make sure that the ETACS-ECU, the junction

block (J/B), the front-ECU and the engine com-
partment relay box are connected securely.

• Check that the system fuses and fusible links are

not burned out.

STANDARD FLOW OF DIAGNOSTIC
TROUBLESHOOTING

M1549000500694

1. Gather information about the problem from the

customer.

2. Verify that the condition described by the

customer exists.

NOTE: If an error occurs in the SWS communica-
tion line, the ECU isolated from the communica-
tion line performs a fail-safe or backup operation,
so the problem may not match the one shown in
the Trouble Symptom Chart. However, the cause
of the failure can be tracked down by performing
the following troubleshooting with the SWS moni-
tor.

MB991896

Adapter harness for
door communication

Door communication line check
(service data)

Tool

Number

Name

Use

MB991896

AC211883

OK

OK

OK

NG

NG

NG

AB

1.

2.

3.

Check that the ETACS-ECU is applicable for the

vehicle specifications.

If the ECU is not applicable for them,

replace it with correct one.

Check the power supply circuit for the ECU

communication lines and repair if necessary.

4.

5.

7.

6.

Gather information about the problem
from the customer.

Verify that the condition described
by the customer exists.

ECU check on the SWS monitor

Confirming version number and destination

Check the data list by using the SWS monitor.

Check of output signal circuit system

Check of input signal circuit system

TROUBLESHOOTING

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-5

3. Confirming version number and destination

Check whether the SWS version number (0) and
destination (EU W/O DRL) meet the vehicle
specifications. If they are different, replace the
ETACS-ECU with a correct one.

4. ECU check on the SWS monitor

Check whether the communication status of the
input- or output-signal-side ECU associated with
the defective function is normal.

• If "OK " is displayed for all related ECUs, they

communicate with each other normally and the
input or output signal circuit system may be
defective. Therefore, check SWS monitor service
data.

• If "NG" is displayed for any of the related ECUs,

something may be wrong with the ECU for which
"NG" appears, its power supply or earthing sys-
tem, or a wiring harness or connector between
the SWS monitor and the ECU. Check the wiring
harness and connectors associated with the ECU
and examine the ECU itself.

5. Check the data list by using the SWS monitor.

Select the defective function from the
function-specific diagnostic menu, and check the
service data that appears for each function item.
This allows you to check whether the transmission
data is normal or not. You can judge which circuit
is the cause of the trouble, input circuit or output
circuit.
NOTE: In addition to the function-specific diag-
nostic menu, a service data menu is available for
SWS monitor service data to check all items for
each ECU.

• The switch condition does not meet the service

data display: Input signal system related to defec-
tive functions

• The switch condition meets the service data dis-

play: Output signal system related to defective
functions

6. Check of input signal circuit system

Check relevant switch, sensor, input signal-side
ECU and their wiring harness and connector.

7. Check of output signal circuit system

Check an output signal-side ECU, electrical load
components and their wiring harness and
connector.

HOW TO CONNECT THE SWS MONITOR

M1549014800524

CAUTION

Always turn the ignition switch to the "LOCK"
(OFF) position before connecting or disconnect-
ing the SWS monitor and the M.U.T.-II/III.

HOW TO CONNECT THE SWS
COMMUNICATION LINE

1. Connect M.U.T.-II/III to the diagnostic connector.
2. Remove the steering column cover.
3. Remove the steering column switch connector.

4. Connect special tool SWS monitor harness (for

column-ECU) MB991812 to the column switch
connector and column switch harness connector.

HOW TO ESTABLISH COMMUNICATION
BETWEEN DOORS

1. Connect special tool SWS monitor harness (for

column-ECU) MB991812 to special tool adapter
harness for door communication MB991896.

2. Connect special tool Probe harness MB991822 to

special tool adapter harness for door
communication MB991896 assembled in step 1.

AC103262AE

Column switch
connector

Column switch
connector at
harness side

MB991812

AC103783AC

MB991812

MB991896

MB991822

TROUBLESHOOTING

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-6

3. Confirm that all the harnesses are connected.

Then insert the probe of special probe harness
MB991822 to each female connector terminal on
special tool adapter harness for door
communication MB991896 by backprobing.
NOTE: For the connectors and their terminal
numbers on the door communication line for the
probe to insert, refer to the reference table.

Reference table of connectors and their

terminal numbers on door

communication line

Insert the probe of the probe harness to each female
connector terminal on the door communication line
by backprobing.

<LH DRIVE VEHICLES>

Connector name

Connector number

Terminal No.

Intermediate connector Instrument panel wiring

harness and front door wiring
harness (LH) combination

C-17 [Front door wiring harness
(LH) side]

7

Instrument panel wiring
harness and front door wiring
harness (RH) combination

C-110 [Front door wiring harness
(RH) side]

8

Instrument panel wiring
harness and floor wiring
harness (RH) combination

C-113 (Instrument panel wiring
harness side)

20

Instrument panel wiring
harness and floor wiring
harness (LH) combination

C-127 (Instrument panel wiring
harness side)

2

Floor wiring harness (RH) and
rear door wiring harness (RH)
combination

D-04 [Floor wiring harness (RH)
side]

7

Floor wiring harness (LH) and
rear door wiring harness (LH)
combination

D-15 [Floor wiring harness (LH)
side]

7

Power window main switch

E-05

11

Front power window sub switch

E-14

6

Rear power window sub switch (LH)

E-08

6

Rear power window sub switch (RH)

E-17

6