Mitsubishi 380. Instruction - page 49
SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)
54B-193
INSPECTION PROCEDURE E-2: Keyless Entry System: The dome lamp, the turn-signal lamps and the
horn do not operate through the answerback function.
.
CIRCUIT OPERATION
The ETACS-ECU operates the following functions
when it receives lock or unlock signal from the trans-
mitter:
• Dome lamp answerback function
• Turn-signal lamp answerback function
• Horn answerback function
.
TECHNICAL DESCRIPTION (COMMENT)
The turn-signal lamps and horn answerback func-
tions can be disabled or enabled. However, the dome
lamp answerback function cannot be disabled.
.
TROUBLESHOOTING HINTS
• Refer to circuit diagrams GROUP-
90
• Refer to configuration diagrams GROUP-
80
• The turn-signal lamp may be defective
• The dome lamp 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
AC305992AB
CONNECTOR: A-06X
16DB355A
A-36 (B)
CONNECTOR: A-36,A-37
A-37
16DB353A
CONNECTOR: C-29
16DB354A
CONNECTOR: C-217
JUNCTION BLOCK
(REAR VIEW)
SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)
54B-194
DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB991958: diagnostic 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
P.54B-191
."
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 lamp : Go to Step 4.
Only the turn-signal lamps : Go to Step 5.
Only the horn : Go to Step 6.
Dome lamp, turn-signal lamps and horn : Replace the
ETACS-ECU. Verify that the answerback functions
work normally.
STEP 4. Verify the dome lamp.
Q: Does the dome lamp illuminate normally?
YES : Replace the ETACS-ECU. Verify that the answerback
functions work normally.
NO : Refer to Inspection Procedure K-1 "The dome lamp
do not illuminate and go out normally
P.54B-359
."
STEP 5. Verify the hazard warning lamp.
Q: Does the hazard warning lamp work normally?
YES : Replace the ETACS-ECU. Verify that the answerback
functions work normally.
NO : Refer to Inspection Procedure I-2 "Hazard warning
lamps do not flash when the hazard warning lamp
switch is turned on
P.54B-314
."
SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)
54B-195
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-37 (HIGH) for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is horn (HIGH) connector A-37 in good condition?
YES : Go to Step 8.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
P.00E-2
. 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
P.00E-2
. Verify that the horn sounds normally.
16DB355A
A-36 (B)
CONNECTOR: A-36,A-37
A-37
ACX02352
AC305992
RELAY BOX SIDE
CONNECTOR: A-06X
AC
FRONT OF VEHICLE
SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)
54B-196
STEP 10. Check the wiring harness between horn relay
connector A-06X (terminal 4) and horn (HIGH) connector
A-37 (terminal 1).
Q: Is the wiring harness between horn relay connector
A-06X (terminal 4) and horn (HIGH) connector A-37
(terminal 1) in good condition?
YES : Replace the ETACS-ECU. Verify that the horn sounds
normally.
NO : The wiring harness may be damaged or the
connector(s) may have loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Repair the wiring harness as necessary. Verify that
the horn sounds normally.
STEP 11. Check horn connector A-36 (LOW) for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is horn (LOW) connector A-36 in good condition?
YES : Go to Step 12.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
P.00E-2
. Verify that the horn sounds normally.
STEP 12. Check the horn (LOW).
Connect the battery as shown, and verify that the horn sounds.
Q: Is the horn normal?
YES : Go to Step 13.
NO : Replace the horn (LOW). Verify that the horn sounds
normally.
AC305992
RELAY BOX SIDE
CONNECTOR: A-06X
AC
FRONT OF VEHICLE
16DB355A
A-36 (B)
CONNECTOR: A-36,A-37
A-37
16DB355A
A-36 (B)
CONNECTOR: A-36,A-37
A-37
ACX02352