Mitsubishi Galant. Manual — part 704

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-211

Inspection Procedure N-8: The driver's or front passenger's door lock key cylinder switch is not sent
to the ETACS-ECU.

AC004241

Driver's or Front Passenger's Door Lock Key Cylinder Switch Input Circuit

AC003079AK

CONNECTOR
BLOCK (LH)

CONNECTOR: C-68

AC003415 AD

CONNECTOR: C-72

CONNECTOR
BLOCK (RH)

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-212

CIRCUIT OPERATION
The ETACS-ECU uses the input signals from the
driver's and front passenger's door lock key cylinder
switch to operate the following devices or functions.

TECHNICAL DESCRIPTION (COMMENT)
The driver's and front passenger's door lock key
cylinder switch input signals is used to operate the
following devices or functions:

•

Central door locking system

•

Theft-alarm system <vehicles with theft-alarm
system>

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

TROUBLESHOOTING HINTS

•

Malfunction of the driver's or front passenger's
door lock key cylinder switch

•

Malfunction of the ETACS-ECU

•

Damaged harness wires or connectors

DIAGNOSIS

Required Special Tools:

•

MB991223: Test Harness Set

•

MB991502: Scan Tool (MUT-II)

•

MB991529: Diagnostic Trouble Code Check Harness

STEP 1. Check the location of malfunction.

Q: Which door key switch signal is not input?

Driver's door : Go to Step 2.
Front passenger's door : Go to Step 8.

STEP 2. Check the driver's door lock key cylinder switch.

Q: Is the driver's door lock key cylinder switch in good

condition?
YES : Go to Step 3.
NO : Replace it. The input signal from the driver's door lock

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

AC003082 AJ

JUNCTION BLOCK
(FRONT VIEW)

CONNECTOR: C-81

AC003086AD

DOOR

CONNECTORS: E-06, E-14

E-14

E-06

SWITCH
POSITION

TESTER
CONNECTION

SPECIFIED
CONDITION

LOCK

2

−

3

Continuity

Neutral (OFF)

−

No continuity

UNLOCK

1

−

2

Continuity

AC000500

1

2

3

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-213

STEP 3. Check the driver's door lock key cylinder switch
ground circuit at driver's door lock key cylinder switch
connector E-14.
(1)Disconnect driver's door lock key cylinder switch connector

E-14 and measure at the harness side.

(2)Measure the resistance between terminal 2 and ground.

Q: Is the resistance less than 2 ohm?

YES : Go to Step 6.
NO : Go to Step 4.

STEP 4. Check driver's door lock key cylinder switch
connector E-14 for damage.
Q: Is driver's door lock key cylinder switch connector E-14

in good condition?
YES : Go to Step 5.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. The input signal from

the driver's door lock key cylinder switch should be
able to be checked and the functions, which are
described in the "Technical Description (comment),"
should work normally.

1

2

3

AC002175 AD

CONNECTOR E-14
(HARNESS SIDE)

AC003086AE

DOOR

CONNECTOR: E-14

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-214

STEP 5. Check the harness wires between driver's door
lock key cylinder switch connector E-14 and ground.
NOTE: After checking intermediate connector C-68, check the
wires. If intermediate connector C-68 is damaged, repair or
replace it. Refer to GROUP 00E, Harness Connector
Inspection

P.00E-2

.

Q: Are the harness wires between driver's door lock key

cylinder switch connector E-14 and ground in good
condition?
YES : There is no action to be taken.
NO : Repair them. The input signal from the driver's door

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

STEP 6. Check the driver's door lock key cylinder switch
connector E-14 and ETACS-ECU connector C-81 for
damage.
Q: Are driver's door lock key cylinder switch connector E-

14 and ETACS-ECU connector C-81 in good condition?
YES : Go to Step 7.
NO : Repair or replace them. Refer to GROUP 00E,

Harness Connector Inspection

P.00E-2

. The input

signal from the driver's door lock key cylinder switch
should be able to be checked and the functions,
which are described in the "Technical Description
(comment)," should work normally.

AC003086AE

DOOR

CONNECTOR: E-14

AC003079AK

CONNECTOR
BLOCK (LH)

CONNECTOR: C-68

AC003082 AJ

JUNCTION BLOCK
(FRONT VIEW)

CONNECTOR: C-81

AC003086AE

DOOR

CONNECTOR: E-14