2005 MITSUBISHI 380 Sound system

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-190
KEYLESS ENTRY HAZARD ANSWERBACK AND
HORN ANSWERBACK FUNCTION
.
KEYLESS ENTRY HAZARD ANSWERBACK
FUNCTION*
1
If the keyless entry transmitter is used to send a lock signal to
the ETACS-ECU, all doors are locked and the hazard warning
lamps flash once. If an unlock signal is sent, the driver's door is
unlocked first,*
2 and if a second signal is sent, all doors are
unlocked. Each time the unlock signal is sent, the hazard warn-
ing lamps flash twice.
NOTE: *
1: The hazard answerback function can be customized
using the keyless entry transmitter (Refer to Group 42 P.42-72,
Keyless Entry System) or by using the multi center display
(middle grade type). Refer to P.54B-486.
NOTE: *
2: Vehicles with a multi center display (middle grade
type) can be customized so that a single unlock operation will
unlock all doors. Refer to P.54B-486.
.
KEYLESS ENTRY HORN ANSWERBACK
FUNCTION
If the keyless entry transmitter is used to send a lock signal to
the ETACS-ECU, the first signal locks all doors while the sec-
ond signal sounds the horn once.
NOTE: : The horn answerback function can be customized by
using the keyless entry transmitter (Refer to Group 42 P.42-72,
Keyless Entry System) or by using the multi center display
(middle grade type). Refer to P.54B-486.
TIMED LOCKING MECHANISM
.After unlocking the doors with the keyless entry transmitter, if
no doors are opened, if the ignition key is not inserted or if the
locking function is not operated, the ETACS-ECU automatically
locks the doors in 30 seconds.
NOTE: The timed locking function can be customized on vehi-
cles equipped with a multi center display (middle grade type).
Refer to P.54B-486.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-192
STEP 2. Check the input signal (by using the pulse check
mode of the monitor).
Check input signals from the transmitter.
To prevent damage to diagnostic tool MB991958, always
turn the ignition switch to the "LOCK" (OFF) position
before connecting or disconnecting diagnostic tool
MB991958.
(1) Connect diagnostic tool MB991958.Refer to "How to
connect SWS monitor P.54B-13."
(2) Operate diagnostic 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) Push the transmitter "LOCK" or "UNLOCK" button.
(4) Check that diagnostic tool MB991958 sounds
Q: When the transmitter "LOCK" or "UNLOCK" button is
turned ON, does diagnostic tool MB991958 sound?
YES : Replace the ETACS-ECU. All the doors can be locked
or unlocked by means of the transmitter.
NO : Refer to Inspection Procedure N-8 "ETACS-ECU
does not receive any signal from the lock, unlock,
trunk or panic switch P.54B-472."

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.

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.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-197
STEP 13. 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 14.
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 14. Check the wiring harness between horn relay
connector A-06X (terminal 4) and horn (LOW) connector
A-36 (terminal 1).
Q: Is the wiring harness between horn relay connector
A-06X (terminal 4) and horn (LOW) connector A-36
(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.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-198
STEP 15. 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 16.
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 16. Check the horn relay.
Q: Is the horn relay normal?
YES : Go to Step 17.
NO : Replace the horn relay. Verify that the horn sounds
normally.
BATTERY
VOLTAGETESTER
CONNECTIONSPECIFIED
CONDITION
Not applied 1
4 Open circuit
Connect
terminal 2 to the
positive battery
terminal
Connect
terminal 3 to the
negative battery
terminal1
4 Less than 2 ohms

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-199
STEP 17. Check the battery power supply circuit to the
horn relay. Measure the voltage at horn relay connector
A-06X.
(1) Disconnect horn relay connector A-06X and measure the
voltage available at the relay box side of the connector.
(2) Measure the voltage between terminal 1 and ground, and
also between terminal 2 and ground.
The voltage should measure approximately 12 volts
(battery positive voltage).
Q: Is the measured voltage approximately 12 volts (battery
positive voltage)?
YES : Go to Step 19.
NO : Go to Step 18.
STEP 18. Check the wiring harness between horn relay
connector A-06X (terminals 1 and 2) and the battery.
Q: Is the wiring harness between horn relay connector
A-06X (terminals 1 and 2) and the battery in good
condition?
YES : No action is necessary and testing is complete.
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 19. Check ETACS-ECU connector C-217 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is ETACS-ECU connector C-217 in good condition?
YES : Go to Step 20.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
P.00E-2. Verify that the horn sounds normally.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-200
STEP 20. Check the wiring harness between horn relay
connector A-06X (terminal 3) and ETACS-ECU connector
C-217 (terminal 44).
NOTE: Also check intermediate connector C-29 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the
connector. If intermediate connector C-29 is damaged, repair or
replace the damaged component(s) as described in GROUP
00E, Harness Connector Inspection P.00E-2.
Q: Is the wiring harness between horn relay connector
A-06X (terminal 3) and ETACS-ECU connector C-217
(terminal 44) in good condition?
YES : Go to Step 21.
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.