Mitsubishi Galant. Manual — part 715

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-255

STEP 3. Check trunk lid lock key cylinder switch connector
F-22 for damage.
Q: Is trunk lid lock key cylinder switch connector F-22 in

good condition?
YES : Go to Step 4.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. The input signal from

the trunk lid lock key cylinder switch should be able to
be checked and the theft-alarm system should be
armed normally.

STEP 4. Check the harness wire between trunk lid lock key
cylinder switch connector F-22 and ground.
Q: Is the harness wire between trunk lid lock key cylinder

switch connector F-22 and ground in good condition?
YES : There is no action to be taken.
NO : Repair it. The input signal from the trunk lid lock key

cylinder switch should be able to be checked and the
theft-alarm system should be armed normally.

STEP 5. Check trunk lid lock key cylinder switch connector
F-22 and ETACS-ECU connector C-81 for damage.
Q: Are trunk lid lock key cylinder switch connector F-22

and ETACS-ECU connector C-81 in good condition?
YES : Go to Step 6.
NO : Repair or replace them. Refer to GROUP 00E,

Harness Connector Inspection

P.00E-2

. The input

signal from the trunk lid lock key cylinder switch
should be able to be checked and the theft-alarm
system should be armed normally.

AC003540 AC

CONNECTOR: F-22

AC003540 AC

CONNECTOR: F-22

AC003082 AJ

JUNCTION BLOCK
(FRONT VIEW)

CONNECTOR: C-81

AC003540 AC

CONNECTOR: F-22

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-256

STEP 6. Check the harness wires between trunk lid lock
key cylinder switch connector F-22 and ETACS-ECU
connector C-81.
NOTE: After checking intermediate connector C-67, check the
wires. If intermediate connector C-67 is damaged, repair or
replace it. Refer to GROUP 00E, Harness Connector
Inspection

P.00E-2

.

Q: Are the harness wires between trunk lid lock key

cylinder switch connector F-22 and ETACS-ECU
connector C-81 in good condition?
YES : Replace the ETACS-ECU. The input signal from the

trunk lid lock key cylinder switch should be able to be
checked and the theft-alarm system should be armed
normally.

NO : Repair them. The input signal from the trunk lid lock

key cylinder switch should be able to be checked and
the theft-alarm system should be armed normally.

AC003082 AJ

JUNCTION BLOCK
(FRONT VIEW)

CONNECTOR: C-81

AC003540 AC

CONNECTOR: F-22

AC003079AJ

CONNECTOR: C-67

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-257

Inspection Procedure N-14: Column switch: The taillight switch, headlight switch, passing light
switch, dimmer switch or turn-signal light switch signal is not sent to the ETACS-ECU.

CIRCUIT OPERATION
The ETACS-ECU uses the input signal from the
column switch (turn-signal light and lighting switch)
to operate various functions.

TECHNICAL DESCRIPTION (COMMENT)
The column switch (turn-signal light and lighting
switch) input signal is used to operate the following
devices or functions:

•

Light reminder tone alarm function

•

Headlight

•

Turn-signal light

•

Fog light

If the signal fails, these devices will not work
normally.

TROUBLESHOOTING HINTS

•

Malfunction of the column switch (turn-signal light
and lighting switch)

•

Malfunction of the ETACS-ECU

•

Damaged harness wires or connectors

DIAGNOSIS

Required Special Tools:

•

MB991223: Test Harness Set

STEP 1. Check the ignition switch positions.

Q: Does a diagnostic trouble code set when the ignition

switch is at any of the positions?
YES : Carry out the troubleshooting by referring to the

Diagnostic Trouble Code Chart. Refer to

P.54B-8

.

NO : Go to Step 2.

Turn-signal Light and Lighting Switch Input Circuit

AC004262

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-258

STEP 2. Check the turn-signal light and lighting switch.

Q: Is the turn-signal light and lighting switch in good

condition?
YES : Go to Step 3.
NO : Replace it. The input signal from the column switch

(turn-signal light and lighting switch) should be able to
be checked and the functions, which are described in
the "Technical Description (comment)," should work
normally.

STEP 3. Replacement of ECU
(1)Replace the column switch.
(2)The input signal from the column switch (turn-signal light

and lighting switch) should be able to be checked and the
functions, which are described in the "Technical Description
(comment)," should work normally.

Q: Is the input signal from the column switch (turn-signal

light and lighting switch) input normally?
YES : There is no action to be taken.
NO : Replace the ETACS-ECU. The input signal from the

column switch (turn-signal light and lighting switch)
should be able to be checked and the functions,
which are described in the "Technical Description
(comment)," should work normally.

SWITCH
POSITION

TESTER
CONNECTION

SPECIFIED
CONDITION

OFF

−

No continuity

Taillight switch

5

−

9

Continuity

Headlight switch

5

−

7

−

9

Continuity

Passing switch

2

−

12

Continuity

Dimmer switch

2

−

11

−

12

Continuity

Turn-signal light
switch (LH)

1

−

2

Continuity

Turn-signal light
switch (RH)

2

−

3

Continuity

AC003177

UPPER SIDE

AB