Mitsubishi Galant 9G. Manual — part 56
SYMPTOM PROCEDURES
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SIMPLIFIED WIRING SYSTEM (SWS)
54B-220
INSPECTION PROCEDURE E-2: Keyless Entry System: The dome light, the turn-signal lights and the
horn do not operate through the answerback function.
ETACS-ECU
HORN
RELAY
RELAY
BOX
BATTERY
HORN
(LOW)
HORN
(HIGH)
Horn Drive Circuit
AC305992AB
CONNECTOR: A-06X
AC400526
AB
A-38 (B)
CONNECTOR: A-38
SYMPTOM PROCEDURES
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SIMPLIFIED WIRING SYSTEM (SWS)
54B-221
.
CIRCUIT OPERATION
The ETACS-ECU operates the following functions
when it receives lock or unlock signal from the trans-
mitter:
• Dome light answerback function
• Turn-signal light answerback function
• Horn answerback function
.
TECHNICAL DESCRIPTION (COMMENT)
The turn-signal lights and horn answerback functions
can be disabled or enabled. However, the dome light
answerback function cannot be disabled.
.
TROUBLESHOOTING HINTS
• The turn-signal light may be defective
• The dome light may be defective
• The horn may be defective
• The ETACS-ECU may be defective
• The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector
AC305206 BD
CONNECTOR: A-39
A-39 (B)
AC305231
CONNECTOR: C-29
AH
AC305413AD
CONNECTOR: C-217
JUNCTION BLOCK
(REAR VIEW)
SYMPTOM PROCEDURES
TSB Revision
SIMPLIFIED WIRING SYSTEM (SWS)
54B-222
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. Verify the keyless entry system.
Q: Does the keyless entry system work normally?
YES : Go to Step 2.
NO : Refer to Inspection Procedure E-1 "Keyless entry
system does not operate
."
STEP 2. Check the configuration function.
Q: Has the answerback function been enabled by means of
the adjustment function?
YES : Go to Step 3.
NO : Enable the answerback function by means of the
adjustment function. Verify that the answerback
functions work normally.
STEP 3. Verify trouble symptom.
Q: Which answerback function is defective?
Only the dome light : Go to Step 4.
Only the turn-signal lights : Go to Step 5.
Only the horn : Go to Step 6.
Dome light, turn-signal lights and horn : Replace the
ETACS-ECU. Verify that the answerback functions
work normally.
STEP 4. Verify the dome light.
Q: Does the dome light illuminate normally?
YES : Replace the ETACS-ECU. Verify that the answerback
functions work normally.
NO : Refer to Inspection Procedure K-1 "The dome light do
not illuminate and go out normally
."
STEP 5. Verify the hazard warning light.
Q: Does the hazard warning light work normally?
YES : Replace the ETACS-ECU. Verify that the answerback
functions work normally.
NO : Refer to Inspection Procedure I-2 "Hazard warning
lights do not flash when the hazard warning light
switch is turned on
SYMPTOM PROCEDURES
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SIMPLIFIED WIRING SYSTEM (SWS)
54B-223
STEP 6. Verify which horn is defective.
Q: Which horn does not sound?
Horn (HIGH) : Go to Step 7.
Horn (LOW) : Go to Step 11.
Both horns : Go to Step 15.
STEP 7. Check horn connector A-39 (HIGH) for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is horn (HIGH) connector A-39 in good condition?
YES : Go to Step 8.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. Verify that the horn sounds normally.
STEP 8. Check the horn (HIGH).
Connect the battery as shown, and verify that the horn sounds.
Q: Is the horn normal?
YES : Go to Step 9.
NO : Replace the horn (HIGH). Verify that the horn sounds
normally.
STEP 9. Check horn relay connector A-06X for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is horn relay connector A-06X in good condition?
YES : Go to Step 10.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
. Verify that the horn sounds normally.
AC305206
CONNECTOR: A-39
BE
A-39 (B)
HARNESS SIDE
ACX02352
AC305992
RELAY BOX SIDE
CONNECTOR: A-06X
AC
FRONT OF VEHICLE
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