Mitsubishi Galant. Manual — part 696

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-179

STEP 9. Check the theft-alarm horn relay connector A-11X
and theft-alarm horn connector A-23 for damage.
Q: Are theft-alarm horn relay connector A-11X and theft-

alarm horn connector A-23 in good condition?
YES : Go to Step 10.
NO : Repair or replace them. Refer to GROUP 00E,

Harness Connector Inspection

P.00E-2

. The horn

should sound when the theft-alarm system is
triggered.

STEP 10. Check the harness wire between theft-alarm horn
relay connector A-11X and theft-alarm horn connector A-
23.
Q: Is the harness wire between horn relay connector A-11X

and theft-alarm horn connector A-23 in good condition?
YES : Go to Step 11.
NO : Repair it. The horn should sound when the theft-alarm

system is triggered.

AC003128 AM

CONNECTOR: A-11X

THEFT-
ALARM
HORN
RELAY

BATTERY

AC003129 AF

CONNECTOR: A-23

AC003128 AM

CONNECTOR: A-11X

THEFT-
ALARM
HORN
RELAY

BATTERY

AC003129 AF

CONNECTOR: A-23

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-180

STEP 11. Check that the theft-alarm horn is installed
properly.

NOTE: The theft-alarm horn is grounded to the body through
the installation bolts.

Q: Is the theft-alarm horn installation in good condition?

YES : Replace the ETACS-ECU. The horn should sound

when the theft-alarm system is triggered.

NO : Repair it. The horn should sound when the theft-alarm

system is triggered.

Inspection Procedure M-3: Theft-alarm system: Headlights (high-beam) do not flash when the theft-
alarm system is triggered.

HEADLIGHTS (HIGH-BEAM) DO NOT FLASH
WHEN THE THEFT-ALARM SYSTEM IS
TRIGGERED
If the headlights (high-beam) work normally, the
front-ECU or the ETACS-ECU may be defective.

TROUBLESHOOTING HINTS

•

Malfunction of the front-ECU

•

Malfunction of the ETACS-ECU

•

Damaged harness wires or connectors

DIAGNOSIS

STEP 1. Check the headlight (high-beam) operation.

Q: Do the headlights (high-beam) illuminate normally?

YES : Go to Step 2.
NO : Solve the problem first. Refer to

P.54B-128

.

STEP 2. Replacement of ECU
(1)Replace the ETACS-ECU.
(2)The headlights (high-beam) should flash when the theft-

alarm system is triggered.

Q: Do the headlights (high-beam) flash normally by the

theft-alarm system?
YES : There is no action to be taken.
NO : Replace the front-ECU. The headlights (high-beam)

should flash when the theft-alarm system is triggered.

Inspection Procedure M-4: Theft-alarm system: Panic alarm fonction does not work.

PANIC ALARM FUNCTION DOES NOT WORK
If the keyless entry system is normal, the ETACS-
ECU is defective.

TROUBLESHOOTING HINTS

•

Malfunction of the ETACS-ECU

•

Damaged harness wires or connectors

DIAGNOSIS

Required Special Tools:

•

MB991502: Scan Tool (MUT-II)

•

MB991529: Diagnostic Trouble Code Check Harness

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-181

STEP 1. Check the keyless entry system.

Q: Does the keyless entry system work normally?

YES : Go to Step 2<when using scan tool MB991502> or

3<when using a voltmeter>.

NO : Solve the problem first. Refer to

P.54B-9

.

STEP 2. Check the input signal (by using scan tool
MB991502).
Check the input signals from the transmitter "PANIC" switch.

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991502.
(1)Connect scan tool MB991502 to the data link connector.
(2)Check that the tone alarm of scan tool MB991502 sounds

when the input signal enters.

Q: Does the tone alarm of scan tool MB991502 sound when

the input signal enters?
YES : Replace the ETACS-ECU. The panic alarm should

work normally.

NO : Check the transmitter input signal circuit. Refer to

Inspection Procedure N-17 (

P.54B-265

).

STEP 3. Check the input signal (by using a voltmeter).
Check the input signals from the transmitter "PANIC" switch.
(1)Use special tool MB991529 to connect a voltmeter between

ground terminal 4 or 5 and ETACS-ECU terminal 9 of the
data link connector.

(2)Check that the voltmeter indicator deflects once when the

input signal enters.

Q: Does the voltmeter indicator deflect?

YES : Replace the ETACS-ECU. The panic alarm should

work normally.

NO : Check the transmitter input signal circuit. Refer to

Inspection Procedure N-17 (

P.54B-265

).

AC003081 AB

16 PIN

MB991502

AC003083

16 PIN

AB

ETACS-ECU
TERMINAL

GROUNDED TERMINAL

MB991529

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-182

Inspection Procedure N-1: The ignition switch (ACC) signal is not sent to the ETACS-ECU.

CIRCUIT OPERATION.
The ETACS-ECU operates various functions
according to the input signal from the ignition switch
(ACC).

TECHNICAL DESCRIPTION (COMMENT)
The ignition switch (ACC) input signal is used to
operate the windshield wiper and washer. If the
signal fails, windshield wiper and washer will not
work normally.

NOTE: The windshield wiper and washer works
normally if a normal ignition switch (ACC) signal is
sent from the ignition switch directly to the front-ECU.

TROUBLESHOOTING HINTS

•

Malfunction of the ETACS-ECU

•

Damaged harness wires or connectors

DIAGNOSIS

Required Special Tools:

•

MB991223: Test Harness Set

Ignition Switch (ACC) Input Circuit

AC004233

AC003082AD

JUNCTION BLOCK
(FRONT VIEW)

CONNECTOR: C-73

AC003080 AD

JUNCTION BLOCK
(REAR VIEW)

CONNECTOR: C-86