Mitsubishi Colt Ralliart. Manual — part 374

TROUBLESHOOTING

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-4

TROUBLESHOOTING

PRIOR TO TROUBLESHOOTING

M1549014700798

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

• Make sure that the ETACS-ECU and the junction

block (J/B) are connected securely.

• Check that the system fuses and fusible links are

not burned out.

STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING

M1549000500984

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.

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 by using 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.

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

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TOC

TROUBLESHOOTING

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-5

5. SWS monitor data list

Select the defective function from the
function-specific diagnostic menu, and check the
service data that appears for each function item.
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.

i. When the SWS communication line is monitored:

You can determine whether the problem lies in the

input or output signal circuit system by checking
whether communication data is correct.

• The switch condition does not meet the serv-

ice data display: Input signal system related to
defective functions

• The switch condition meets the service data

display: Output signal system related to
defective functions

ii. When the door communication line is monitored:

The communication data, which the power window

main switch (power window module) transmits,
can be confirmed. Determine the cause by
changing the point where a probe is inserted.

• The switch condition does not meet the serv-

ice data display: Wiring harness wire(s) or
connector(s) between the power window main
switch and the probe-inserted point as well as
the power window main switch

• The switch condition meets the service data

display: Wiring harness wire(s) or connec-
tor(s) between each power window sub switch
and the probe-inserted point as well as the
power window sub switch

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

M1549014800762

CAUTION

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

HOW TO CONNECT THE SWS
COMMUNICATION LINE <SPECIAL TOOL
SWS MONITOR HARNESS (FOR
COLUMN-ECU) MB991812>

1. Remove the steering column cover.
2. Remove the steering column switch connector.
3. Connect special tool SWS monitor harness (for

column-ECU) MB991812.

AC103262AE

Column switch
connector

Column switch
connector at
harness side

MB991812

Main

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TROUBLESHOOTING

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-6

<WHEN CONNECTING THE DIAGNOSIS
CONNECTOR BY USING THE
INTERMEDIATE WIRES FOR SWS
MONITOR CUSTOMISATION>

1. Connect the special tool Intermediate wires

(MB991960) for SWS monitor customisation to
the special tool M.U.T.-III main harness A
(MB991910).

2. Connect the M.U.T.-III main harness A (with the

intermediate wires) to the special tool V.C.I.
(MB991824) .

3. Connect the intermediate wires for SWS monitor

customisation to the diagnosis connector and the
SWS monitor cartridge.

ECU CHECK

M1549014900703

1. Use the M.U.T.-III and the SWS monitor to check

ECUs.

2. The following ECUs can be checked by using the

M.U.T.-III and the SWS monitor.

NOTE: If a malfunction is found by the "ECU check",
proceed "Symptom Procedure" (Refer to

P.54C-29

).

SWS monitor-compatible ECUs and their conditions

NOTE:

*

: If "NG" is displayed beside the ETACS-ECU while the ignition switch is off, "NG" is also displayed

beside the column-ECU.

DATA LIST CHECK

M1549015000770

1. Use the M.U.T.-III and the SWS monitor to check

"DATA LIST." This "DATA LIST" check is applica-
ble for signals, which are transmitted and
received through the SWS communication line
and the communication lines routed from one
door to another. For the input signals which are
not applicable for the SWS monitor check, refer
to pulse check procedure

P.54C-32

.

NOTE: If a problem is found in the "DATA LIST"

check, refer to the Problems during Input Signal
Check <Service data, function diagnosis or pulse
check> (Refer to

P.54C-32

).

2. The following input signals can be checked by

using the M.U.T.-III and the SWS monitor.

AC208648

AB

MB991910

MB991824

MB991960

Diagnosis connector

MB991806
(SWSmonitor
cartridge)

Item No.

ECUs to be checked Display on

M.U.T.-III

Normal
condition

ECU conditions

Item 80

Column switch
(column-ECU)

COLUMN ECU

OK

*

All of the column switch,
power supply, earth and
interconnecting
communication line are
normal

Item 83

ETACS-ECU

ETACS ECU

OK

All of the ETACS-ECU switch,
power supply, earth and
interconnecting
communication line are
normal

−

Other SWS-related
ECUs

Other ECUs

NG

ECUs are not used

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TROUBLESHOOTING

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-7

DATA LIST REFERENCE TABLE
COLUMN SWITCH (COLUMN-ECU)

Item No. Check item

Display on
M.U.T.-III

Check condition

Normal condition

00

Headlamp
switch

HEADLAMP
SW

lighting switch: HEAD

ON

lighting switch: Other than HEAD

OFF

01

Tail lamp
switch

TAIL LAMP SW Lighting switch: TAIL

ON

Lighting itch: OFF

OFF

02

Dimmer
switch

DIMMER SW

Dimmer switch: ON

ON

Dimmer switch: OFF

OFF

03

Passing lamp
switch

PASSING SW

Passing lamp which: ON

ON

Passing lamp which: OFF

OFF

05

Windshield
intermittent
wiper switch

INT WIPER SW Wiper switch: INT

ON

Wiper switch: Other than INT

OFF

06

Windshield
low-speed
wiper switch

LO WIPER SW Wiper switch: LO

ON

Wiper switch: Other than LO

OFF

07

Windshield
high-speed
wiper switch

HI WIPER SW

Wiper switch: HI

ON

Wiper switch: Other than HI

OFF

08

Wind shield
mist wiper
switch

MIST WIPER
SW

Wiper switch: Mist

ON

Wiper switch: Other than mist

OFF

09

Windshield
washer
switch

FRONT WASH.
SW

Windshield washer switch: ON

ON

Windshield washer switch: OFF

OFF

10

Turn-signal
lamp switch
(RH)

TURN SIG. RH Turn-signal lamp switch: RH

ON

Turn-signal lamp switch: Other than RH

OFF

11

Turn-signal
lamp switch
(LH)

TURN SIG. LH Turn-signal lamp switch: LH

ON

Turn-signal lamp switch: Other than LH

OFF

13

Rear wiper
switch

REAR WIPER
SW

Rear wiper switch: INT

ON

Rear wiper switch: Other than INT

OFF

14

Rear washer
switch

REAR WASH.
SW

Rear wiper switch: Washer

ON

Rear wiper switch: Other than washer

OFF

15

With or
without
windshield
intermittent
wiper control

INT WIP KNOB Vehicles with intermittent wiper control

EQUIP

Vehicles without intermittent wiper control

NONE

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