Mitsubishi Galant 9G. Manual — part 95

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-376

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991910: MUT-III Main Harness A

STEP 1. Check the turn-signal lights.
Q: Do the turn-signal lights illuminate normally?

YES : Go to Step 2.
NO : Refer to Inspection Procedure I-1 "Turn-signal lights

do not flash when the turn-signal light switch is turned
on

P.54B-369

."

STEP 2. Check the input signal (by using the pulse check
mode of the monitor).
Check input signal from the hazard warning light switch.

CAUTION

To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect the special tool. Refer to "How to connect SWS

monitor

P.54B-13

."

(2) Operate scan tool MB991958 according to the procedure

below to display "Pulse check."
a. Select "Interactive Diagnosis."
b. Select "System select."
c. Select "SWS."
d. Select "Pulse Checking."

(3) Check that scan tool MB991958 sounds when the hazard

warning light switch is turned from "OFF" to "ON."

Q: Does scan tool MB991958 sound when the hazard

warning light switch is turned from "OFF" to "ON"?
YES : Replace the ETACS-ECU. Verify that the hazard

warning lights illuminate normally.

NO : Refer to Inspection Procedure N-2 "ETACS-ECU

does not receive any signal from the hazard warning
light switch

P.54B-501

."

AC305412

AB

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

SYMPTOM PROCEDURES

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-377

INSPECTION PROCEDURE I-3: Flasher Timer: One of the turn-signal lights does not illuminate.

JUNCTION BLOCK

BATTERY

RELAY
BOX

FRONT
COMBINATION
LIGHT

REAR
COMBINATION
LIGHT

(LH)

(RH)

(LH)

(RH)

TURN-SIGNAL
LIGHT RELAY: LH

TURN-SIGNAL
LIGHT RELAY: RH

ETACS-ECU

JUNCTION BLOCK SIDE

Turn-Signal Lights Circuit

SYMPTOM PROCEDURES

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-378

.

TECHNICAL DESCRIPTION (COMMENT)

If the right or left turn-signal light does not illuminate,
their bulb may be defective.

.

TROUBLESHOOTING HINTS

• The turn-signal light bulb may be defective

• The wiring harness or connectors may have

loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector

.

AC400526

AK

CONNECTOR: A-18

A-18 (GR)

AC305206 AN

CONNECTOR: A-34

A-34 (GR)

AC305415

CONNECTORS: C-204, C-214

AQ

C-204

C-214

AC305413AB

CONNECTOR: C-219

JUNCTION BLOCK

(REAR VIEW)

AC305260

F-09

F-03

CONNECTORS: F-03, F-09

AE

SYMPTOM PROCEDURES

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-379

DIAGNOSIS

Required Special Tool:

• MB991223: Harness Set

STEP 1. Check the hazard warning light.
Q: Which turn-signal light does not illuminate?

front turn-signal light (LH) : Go to Step 2.
front turn-signal light (RH) : Go to Step 8.
rear combination light (LH) : Go to Step 14.
rear combination light (RH) : Go to Step 20.
Turn-signal indicators : Refer to Inspection Procedure I-4

"The turn-signal light indicator does not illuminate
normally

P.54B-391

."

LH side only : Refer to Inspection Procedure I-1

"Turn-signal lights do not flash when the turn-signal
light switch is turned on

P.54B-369

."

RH side only : Refer to Inspection Procedure I-1

"Turn-signal lights do not flash when the turn-signal
light switch is turned on

P.54B-369

."

Both LH and RH sides : Refer to Inspection Procedure I-2

"Hazard warning lights do not flash when the hazard
warning light switch is turned on

P.54B-375

."

STEP 2. Check front combination light (LH) connector A-18
for loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is front combination light (LH) connector A-18 in good

condition?
YES : Go to Step 3.
NO : Repair or replace the damaged component(s). Refer

to GROUP 00E, Harness Connector Inspection

P.00E-2

. Verify that the turn-signal lights illuminate

normally.

STEP 3. Check the front turn-signal light bulb (LH).
(1) Remove the front turn-signal (LH) light bulb.
(2) Verify that the front turn-signal light bulb (LH) is not

damaged or burned out.

Q: Is the front turn-signal (LH) light bulb in good

condition?
YES : Go to Step 4.
NO : Replace the front turn-signal (LH) light bulb. Verify

that the turn-signal lights illuminate normally.

AC400526

A-18 (GR)

CONNECTOR: A-18

AL

HARNESS SIDE