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Mitsubishi Colt Ralliart. Manual - part 384

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-44

Step 6. Connector check: B-133 ETACS-ECU
connector and B-135 column switch connector

Q: Is the check result normal?

YES :

Go to Step 7.

NO :

Repair the defective connector.

Step 7. Check the wiring harness from B-133
ETACS-ECU connector terminal Nos. 54 and 63 to
B-134 column switch connector terminal Nos. 3
and 2.

• Check the communication lines for open circuit.

Q: Is the check result normal?

YES :

Go to Step 8.

NO :

Repair the wiring harness.

Step 8. ECU check by using the SWS monitor

• Ignition switch: OFF

ECU TO BE CHECKED

• ETACS ECU

OK: "OK" is displayed on the "ETACS ECU"
menu.

Q: Is the check result normal?

YES :

The trouble can be an intermittent

malfunction (Refer to GROUP 00

− How to

use Troubleshooting/inspection Service
Points

− How to Cope with Intermittent

Malfunction

P.00-13

NO :

Replace the ETACS-ECU.

AC313826AC

B-133 (GR)

Connector: B-133

Harness side

Junction block (Rear view)

AC401044AC

Connector: B-135

Harness side

AC313827

Connectors: B-133, B-134

B-133 (GR)

B-133

B-134

13 12

7 6 5

2 1

16 15

Junction block (Rear view)

Harness side

Junction block side

Main

Index

Group

TOC

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-45

BUZZER

INSPECTION PROCEDURE B-1: Lamp reminder buzzer function does not work normally.

CAUTION

Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.

COMMENTS ON TROUBLE SYMPTOM

The ETACS-ECU operates this function in accord-
ance with the input signals below.

• Ignition switch (IG1)

• Front door switch (RH)

• Tail lamp switch

• Headlamp switch

If this function does not work normally, these input
signal circuit(s) or the ETACS-ECU may be defec-
tive.

POSSIBLE CAUSES

• Malfunction of the front door switch (RH)

• Malfunction of the column switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSTIC PROCEDURE

Step 1. ECU check by using the SWS monitor
Check that the power supply and earth lines to the
ETACS-ECU and the column switch (column-ECU)
and the SWS communication lines are normal.

• Ignition switch: OFF

ECU TO BE CHECKED

• ETACS ECU

• COLUMN ECU

OK: "OK" are displayed for all the items

Q: Is the check result normal?

"OK" is displayed for all the items :

Go to Step 2.

"NG" is displayed on the "ETACS ECU" menu. :

Refer to Inspection Procedure A-3
"Communication with the ETACS-ECU is
not possible

P.54C-41

"NG" is displayed on the "COLUMN ECU" menu. :

Refer to Inspection Procedure A-2
"Communication with the column switch
(column-ECU) is not possible

P.54C-37

ETACS-ECU

INPUT SIGNAL

· DRIVER'S DOOR SWITCH

· TAIL LAMP SWITCH

· IGNITION SWITCH (IG1)

· HEADLAMP SWITCH

Lamp Reminder Tone Alarm Function

Main

Index

Group

TOC

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-46

Step 2. Function diagnosis by using the SWS
monitor
Check the SWS communication signal, which are
related to the lamp reminder function.

<Selected item> BUZZER - LGT MONI. ALRM

• Ignition switch: OFF (key removed)

• lighting switch: TAIL or HEAD

• Driver's door: open

OK: Normal conditions are displayed for all
the items.

Q: Is the check result normal?

Normal conditions are displayed for all the items. :

Go to Step 3.

Normal condition is not displayed for item No.00 or
No.01 :

Refer to inspection procedure N-4

"Column switch (lighting and turn-signal
lamp switch) signal is not received

P.54C-208

Normal condition is not displayed for item No.30 :

Refer to inspection procedure N-2 "The
ignition switch (IG1) signal is not received

P.54C-203

Normal condition is not displayed for item No.32 :

Refer to inspection procedure N-3 "The
driver's door switch signal is not received

P.54C-205

Normal condition is not displayed for item No.43 :

Replace the ETACS-ECU.

Step 3. Retest the system.
The lamp reminder buzzer function should work nor-
mally.

Q: Is the check result normal?

YES :

The trouble can be an intermittent

malfunction (Refer to GROUP 00

− How to

use Troubleshooting/inspection Service
Points

− How to Cope with Intermittent

Malfunction

P.00-13

NO :

Replace the ETACS-ECU.

Item No.

Item name

Normal condition

Item 00

HEADLAMP
SW

ON when the
lighting switch is at
HEAD

Item 01

TAIL LAMP SW ON when the

lighting switch is at
TAIL

Item 30

IG SW(IG1)

OFF

Item 32

DR DOOR SW ON

Item 43

BUZZER

Main

Index

Group

TOC

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-47

INSPECTION PROCEDURE B-2: Door-ajar warning buzzer function does not work.

CAUTION

Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.
NOTE: If the CAN bus diagnostics is carried out, the
door-ajar warning function is triggered.

COMMENTS ON TROUBLE SYMPTOM

The ETACS-ECU operates this function in accord-
ance with the input signals below.

• Ignition switch (IG1)

• All of the door switches

• Vehicle speed signal

If this function does not work normally, these input
signal circuit(s) or the ETACS-ECU may be defec-
tive. Note that this function can be disabled/enabled
by the customise function (default setting; enabled).
In order to change the setting, the SWS monitor is
required.

POSSIBLE CAUSES

• Malfunction of the CAN bus line

• Malfunction of the door switches

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSTIC PROCEDURE

Step 1. Customise function by using the SWS
monitor
Use the SWS monitor customisation function to con-
firm that "DOOR WARN BUZ" is set to "W.FUNC-
TION".

Q: Is the check result normal?

YES :

Go to Step 2.

NO :

Use the SWS monitor customisation
function to set "DOOR WARN BUZ" to
"W.FUNCTION" (Refer to

P.54C-240

Step 2. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.

Q: Is the check result normal?

YES :

Go to Step 3.

NO :

Repair the CAN bus line (Refer to GROUP
54D, Diagnosis

P.54D-13

Step 3. M.U.T.-III other system diagnosis code
Check whether the combination meter-related diag-
nosis code is set.

Q: Is the diagnosis code set?

YES :

Diagnose the combination meter (Refer to

GROUP 54A

− Troubleshooting

P.54A-31

NO :

Go to Step 4.

Door-Ajar Warning Buzzer Function

ETACS-
ECU

SPEED SIGNAL

COMBINATION
METER

CAN COMMUNICATION LINE
(CAN_L LINE)

CAN COMMUNICATION LINE
(CAN_H LINE)

INPUT SIGNAL

· DOOR SWITCHES
· IGNITION SWITCH (IG1)
· TAILGATE SWITCH

Main

Index

Group

TOC

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