Mitsubishi Galant. Manual — part 700

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-195

STEP 4. Check the harness wires between fog light switch
connector C-25 and ground.
NOTE: After checking joint connector C-56, check the wires. If
joint connector C-56 is damaged, repair or replace it. Refer to
GROUP 00E, Harness Connector Inspection

P.00E-2

.

Q: Are the harness wires between fog light switch

connector C-25 and ground in good condition?
YES : There is no action to be taken.
NO : Repair them. The fog light switch input signal should

be able to be checked and the fog lights should work
normally.

STEP 5. Check fog light switch connector C-25 and
ETACS-ECU connector C-82 for damage.
Q: Are fog light switch connector C-25 and ETACS-ECU

connector C-82 in good condition?
YES : Go to Step 6.
NO : Repair or replace them. Refer to GROUP 00E,

Harness Connector Inspection

P.00E-2

. The fog light

switch input signal should be able to be checked and
the fog lights should work normally.

AC003089 AK

CONNECTORS: C-25, C-56

C-25

C-56

AC003089 AL

CONNECTOR: C-25

AC003082AC

JUNCTION BLOCK
(FRONT VIEW)

CONNECTOR: C-82

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-196

STEP 6. Check the harness wire between fog light switch
connector C-25 and ETACS-ECU connector C-82.
Q: Is the harness wire between fog light switch connector

C-25 and ETACS-ECU connector C-82 in good
condition?
YES : Replace the ETACS-ECU. The fog light switch input

signal should be able to be checked and the fog lights
should work normally.

NO : Repair it. The fog light switch input signal should be

able to be checked and the fog lights should work
normally.

Inspection Procedure N-6: The driver's seat belt switch is not sent to the ETACS-ECU.

AC003089 AL

CONNECTOR: C-25

AC003082AC

JUNCTION BLOCK
(FRONT VIEW)

CONNECTOR: C-82

Driver's Seat Belt Switch input Circuit

AC004238

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-197

CIRCUIT OPERATION
The ETACS-ECU operates various functions
according to the input signals from the driver's seat
belt switch.

TECHNICAL DESCRIPTION (COMMENT)
The driver's seat belt switch input signal is used to
operate the following functions; seat belt tone alarm
function, seat belt warning light. If the input signal is
an error, these functions will not work normally.

TROUBLESHOOTING HINTS

•

Malfunction of the driver's inner seat belt (driver's
seat belt 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

AC003079AJ

CONNECTOR: C-67

AC003082AC

JUNCTION BLOCK
(FRONT VIEW)

CONNECTOR: C-82

AC003084 AC

CONNECTOR: D-25

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-198

STEP 1. Check the driver's seat belt switch.

Q: Is the driver's seat belt switch in good condition?

YES : Go to Step 2.
NO : Replace the driver's inner seat belt. The driver's seat

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

STEP 2. Check the driver's seat belt switch ground circuit
at driver's seat belt switch connector D-25.
(1)Disconnect driver's seat belt switch connector D-25 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 5.
NO : Go to Step 3.

STEP 3. Check driver's seat belt switch connector D-25 for
damage.
Q: Is driver's seat belt switch connector D-25 in good

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

Connector Inspection

P.00E-2

. The driver's seat belt

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

ITEM

TESTER
CONNECTION

SPECIFIED
CONDITION

Fastened seat
belt

−

No continuity

Unfastened seat
belt

1

−

2

Continuity

ACX00636

TONGUE

BUCKLE

AC

2 1

AC002174 AC

CONNECTOR D-25
(HARNESS SIDE)

AC003084 AC

CONNECTOR: D-25