Battery MITSUBISHI 380 2005 Workshop Manual

GENERAL DESCRIPTION
SIMPLIFIED WIRING SYSTEM (SWS)54B-5
INTERMITTENT CONTROL
ETACS-ECU uses the dial position of the variable
intermittent wiper control switch and the vehicle
speed signal sent by the combination meter to calcu-
late the interval to be sent to the front-ECU. The
front-ECU determines the intermittent time from the
input SWS data signal, and turns ON the windshield
wiper drive signal. When the wiper is at the STOP
position, the windshield wiper auto-stop signal goes
OFF to turn OFF the windshield wiper drive signal.
After the intermittent time from when the windshield
wiper drive signal turned ON, the windshield wiper
drive signal is turned ON again and the above opera-
tion is repeated.
.
MIST WIPER CONTROL
When the ignition switch is in the ACC or ON posi-
tion, and the windshield mist wiper switch of the col-
umn switch is turned ON, the front-ECU turns ON the
windshield wiper drive signal. At the same time, the
wiper speed switching relay is turned ON
(HIGH-SPEED). While the windshield mist wiper
switch is ON, the windshield wiper will operate at
high speed. Then, if the windshield mist wiper switch
is turned off, the wiper operates at low speed until it
stops at the predetermined park position.
When the windshield mist switch is turned on briefly,
the wiper operates once at low speed.
At the point the windshield mist switch is turned ON,
if the windshield wiper has been operating intermit-
tently, the same operations as the above will be per-
formed while the windshield mist wiper switch is ON.
After the windshield mist wiper switch goes OFF, the
intermittent operations will be set again after the
windshield wiper auto-stop signal last is turned ON.
.
WASHER CONTROL
When the ignition switch is in the ACC or ON posi-
tion, and the windshield washer switch of the column
switch is turned ON, the front-ECU turns ON the
windshield washer relay. The windshield wiper drive
signal is turned ON in 0.15 seconds until 2 seconds
after the windshield washer switch goes OFF to
operate the windshield wiper continuously. When the
windshield washer switch is turned ON, if the wind-
shield wiper is operating intermittently, intermittent
operations will be continued after continuous opera-
tions.
HEADLAMP
.
HEADLAMP AUTOMATIC SHUTDOWN
FUNCTION
Even if the lighting switch (tail lamp switch or
headlamp switch) is ON, the headlamps and tail
lamps will automatically go off in the following condi-
tions to prevent the battery from discharging:
When the ignition key is turned from "ON" to "LOCK"
(OFF) or "ACC" position with the lighting switch
turned ON, and this state continues for three min-
utes, the lamp will automatically be turned off. If the
driver's seat door is opened during these three min-
utes, the lamp will go off one second later.
.
HIGH-BEAM INDICATOR
At the same time that the high beams are illumi-
nated, the ETACS-ECU sends a signal to illuminate
the high-beam indicator via the CAN bus line. The
combination meter receives the transmitted signal
and turns the high-beam indicator on and off.
FLASHER TIMER
.
TURN-SIGNAL LAMP
The turn-signal lamp output (flashing signal) is
turned ON when the ignition switch is ON and the
turn-signal lamp switch is ON (LH or RH). If the front
turn-signal lamp or rear turn-signal lamp bulb has
burned out, the flashing speed increases to indicate
that the bulb has burned out.
.
HAZARD WARNING LAMP
Detects the signal where the hazard warning lamp
switch input changes from OFF to ON, and reverse
the flashing state according to this signal. The haz-
ard warning lamps toggle on and off whenever the
hazard warning lamp switch is operated.
.
TURN-SIGNAL INDICATORS
At the same time that the turn-signal lamps are illu-
minated, the ETACS-ECU sends a signal to illumi-
nate the turn-signal lamp indicator via the CAN bus
line. The combination meter receives the transmitted
signal and turns the turn-signal lamp indicator on and
off.

GENERAL DESCRIPTION
SIMPLIFIED WIRING SYSTEM (SWS)54B-6
FOG LAMP
.
FOG LAMP
The fog lamps will illuminate only when the fog lamp
switch is operated while the low-beam headlamps
are on.
The fog lamps will be switched off when any of the
following conditions is met. The fog lamps will also
be switched off automatically by headlamp automatic
shutdown function.
When the high-beam headlamps are switched
on, the fog lamps will be switched off. If the
low-beam headlamps are switched on again, the
fog lamps will illuminate again.
When the headlamp switch is turned off while the
tail lamps are on or the tail lamps and headlamps
are off, the fog lamps will be switched off. If the
low-beam headlamps are switched on again, the
fog lamps will not illuminate again.
.
FOG LAMP INDICATOR
At the same time that the fog lamps are illuminated,
the ETACS-ECU sends a signal to illuminate the fog
lamp indicator via the CAN bus line. The combination
meter receives the transmitted signal and turns the
fog lamp indicator on and off.
INTERIOR LAMP
ETACS-ECU makes it possible to force operation of
all ON and OFF lamp switches in the overhead con-
sole (the dome lamp, reading lamp, cargo area lamp,
rear personal lamps, front door lamps, and front foot
lamps). This function is assigned higher priority than
the controls for the interior lamp switch that are per-
formed when the doors are in certain positions.
When the lamps are forced on, the illumination
level is 100% as all interior lamps are switched on
(the dome lamp, reading lamp, cargo area lamp,
rear personal lamps, front door lamps, and front
foot lamps). Even when all lamps are forced on,
the interior lamp automatic shutoff function is
active.
When the lamps are forced off, all interior lamps
are immediately switched off (the dome lamp,
reading lamp, cargo area lamp, rear personal
lamps, front door lamps, and front foot lamps).When the interior lamp switch is at DOOR position,
the ETACS-ECU controls the interior lamps as fol-
lows:
When a door is opened with the ignition switch
off, the interior lamps up to a luminance of 100
percent. When a door is closed, the interior lamps
dims a luminance of 65 percent, and goes off 30
seconds later. However, if the ignition switch is
turned ON or if a door is locked while the interior
lamps is dimming, the dome lamp will go off at
that point.
When a door is opened with the ignition switch
ON, the interior lamps up at a luminance of 100
percent. When all doors are closed, the interior
lamps go off.
When the ignition key is removed with all doors
closed, the interior lamps up at a luminance of
100 percent, and goes off 30 seconds later. How-
ever, if the ignition key is inserted again or if a
door is locked while the interior lamps is lighting,
the interior lamps will go off at that point.
To check keyless entry operations more easily,
the interior lamps will flash twice when doors are
locked. When doors are unlocked, the interior
lamps up at a luminance of 100 percent, and
goes off 15 seconds later.
INTERIOR LAMP AUTOMATIC
SHUTDOUN FUNCTION
Illuminated interior lamps such as the front dome
lamp, etc. (all lamps using the dome lamp fuse as the
power supply) will automatically go off in the follow-
ing conditions to prevent the battery from discharging
as a result of forgetting to turn off the lamps or
incomplete closing of the door.
When the ignition switch is turned off and more
than 30 minutes pass by with the interior lamp
illuminated, the interior lamps will go off automati-
cally.
When the ignition switch is turned off and one of
the door switches remains open for 30 minutes
continuously, the interior lamps will go off auto-
matically.

SWS DIAGNOSIS
SIMPLIFIED WIRING SYSTEM (SWS)54B-11
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. Ensure that the ignition switch is at the "LOCK" (OFF)
position.
2. Start up the personal computer.
3. Connect special tool MB991827 to special tool MB991824
and the personal computer.
4. Connect special tool MB991910 to special tool MB991824.
5. Connect special tool MB991910 to the data link connector.
6. Turn the power switch of special tool MB991824 to the "ON"
position.
NOTE: When special tool MB991824 is energized, special
tool MB991824 indicator lamp will be illuminated in a green
color.
7. Start the MUT-III system on the personal computer.
NOTE: Disconnecting diagnostic tool MB991958 is the reverse
of the connecting sequence, making sure that the ignition
switch is at the "LOCK" (OFF) position.
HOW TO READ AND ERASE DIAGNOSTIC
TROUBLE CODES
Required Special Tools:
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
To prevent damage to diagnostic tool MB991958, always
turn the ignition switch to the "LOCK" (OFF) position
before connecting or disconnecting diagnostic tool
MB991958.
NOTE: If the battery voltage is low, diagnostic trouble codes will
not be set. Check the battery if diagnostic tool MB991958 does
not display.
1. Connect diagnostic tool MB991958 to the data link
connector.
2. Turn the ignition switch to the "ON" position.
3. Select "Interactive Diagnosis" from the start-up screen.
4. Select "System select."
5. Choose "ETACS" .
6. Select "Diagnostic Trouble Code."
7. If a DTC is set, it is shown.
8. Choose "Erase DTCs" to erase the DTC.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-68
INSPECTION PROCEDURE A-2: Communication with the Column Switch (column-ECU) is not
Possible.
NOTE: This troubleshooting procedure requires the
use of diagnostic tool MB991958 and SWS monitor
kit MB991813. For details on how to use the SWS
monitor, refer to "How to connect SWS monitor
P.54B-13."
.
CIRCUIT OPERATION
The power supply to the column switch is pro-
vided by the battery and the ignition switch (IG1).
If the power supply system from the battery is
defective, the system operates by the power sup-
ply from the ignition switch (IG1).
Refer to circuit diagrams GROUP-90
Refer to configuration diagrams GROUP-80
.
TECHNICAL DESCRIPTION (COMMENT)
The power supply circuit to the column switch (col-
umn-ECU) may be defective. If the battery power
supply circuit (terminal 1 of the column switch) to the
ECU is damaged, also check the power supply circuit
from the ignition switch (IG1) (terminal 9 of the col-
umn switch), and repair if necessary.
.
TROUBLESHOOTING HINTS
The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector
The column switch may be defective
The ETACS-ECU may be defective
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
MB991813: SWS Monitor Kit
MB991806: SWS Monitor Cartridge
MB991812: SWS Monitor Harness (For Column-ECU)
MB991822: Probe Harness

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-70
STEP 2. Check column switch connector C-309 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is column switch connector C-309 in good condition?
YES : Go to Step 3.
NO : Repair or replace the damaged component(s). The
system should communicate with the column switch
(column-ECU) normally.
STEP 3. Check the power supply circuit to the column
switch. Measure the voltage at column switch connector
C-309.
(1) Disconnect column switch connector C-309 and measure
the voltage available at the wiring harness side of the
connector.
(2) Measure the voltage between terminal 1 and ground by
backprobing.
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 5.
NO : Go to Step 4.
STEP 4. Check the wiring harness between column switch
connector C-309 (terminal 1) and the battery.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-71
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 connector as described in GROUP 00E, Harness
Connector Inspection P.00E-2.
Q: Is the wiring harness between column switch connector
C-309 (terminal 1) 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. The system
should communicate with the column switch
(column-ECU) normally.
STEP 5. Check the ground circuit to the column switch.
Measure the resistance at column switch connector C-309.
(1) Disconnect column switch connector C-309 and measure
the resistance available at the wiring harness side of the
connector.
(2) Measure the resistance value between terminal 4 and
ground.
The resistance should be 2 ohms or less.
Q: Is the measured resistance 2 ohms or less?
YES : Go to Step 7.
NO : Go to Step 6.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-74
INSPECTION PROCEDURE A-3: Communication with the ETACS-ECU is not Possible.
.
CIRCUIT OPERATION
The power supply to the ETACS-ECU is provided
by the battery and the ignition switch (IG1).
If the power supply system from the battery is
defective, the system operates by the power sup-
ply from the ignition switch (IG1).
Refer to circuit diagrams GROUP-90
Refer to configuration diagrams GROUP-80
.
TECHNICAL DESCRIPTION (COMMENT)
It is suspected that the power supply circuit to the
ETACS-ECU is defective, or the wiring harness
between the SWS monitor kit and the ETACS-ECU
or their connector(s) is damaged. If the battery power
supply circuit to the ECU (terminal 20 of the ETACS-ECU) is damaged, also check the power
supply circuit from the ignition switch (IG1) (terminal
8 of the ETACS-ECU), and repair if necessary. If the
ground circuit to the ECU (terminal 3 of the
ETACS-ECU) is damaged, also check the ground cir-
cuit to the sensor (terminal 50 of the ETACS-ECU),
and repair if necessary.
.
TROUBLESHOOTING HINTS
The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector
The ETACS-ECU may be defective
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

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-75
STEP 1. Check ETACS-ECU connectors C-218 and C-219
for loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Are ETACS-ECU connectors C-218 and C-219 in good
condition?
YES : Go to Step 2.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
P.00E-2. The system should communicate with the
ETACS-ECU normally.
STEP 2. Check the battery power supply circuit to the
ETACS-ECU. Measure the voltage at ETACS-ECU
connector C-219.
(1) Disconnect ETACS-ECU connector C-219 and measure the
voltage available at the junction block side of the connector.
(2) Measure the voltage between terminal 20 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 4.
NO : Go to Step 3.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-76
STEP 3. Check the wiring harness between ETACS-ECU
connector C-219 (terminal 20) and the battery.
NOTE: Also check junction block connector C-214 for loose,
corroded, or damaged terminals, or terminals pushed back in
the connector. If junction block connector C-214 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 ETACS-ECU connector
C-219 (terminal 20) 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. The system
should communicate with the ETACS-ECU normally.
STEP 4. Check the ground circuit to the ETACS-ECU.
Measure the resistance at ETACS-ECU connector C-219.
(1) Disconnect ETACS-ECU connector C-219 and measure the
resistance available at the junction block side of the
connector.
(2) Measure the resistance value between terminal 3 and
ground.
The resistance should be 2 ohms or less.
Q: Is the measured resistance 2 ohms or less?
YES : Go to Step 6.
NO : Go to Step 5.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-80
INSPECTION PROCEDURE A-4: Communication with the Front-ECU is not Possible.
NOTE: This troubleshooting procedure requires the
use of diagnostic tool MB991958 and SWS monitor
kit MB991813. For details on how to use the SWS
monitor, refer to "How to connect SWS monitor
P.54B-13."
.
CIRCUIT OPERATION
The power supply to the front-ECU is provided by
the battery and the ignition switch (IG2).
If the power supply system from the battery is
defective, the system operates by the power sup-
ply from the ignition switch (IG2).
Refer to circuit diagrams GROUP-90
Refer to configuration diagrams GROUP-80
.
TECHNICAL DESCRIPTION (COMMENT)
It is suspected that the power supply circuit to the
front-ECU is defective, or the wiring harness
between the SWS monitor kit and the front-ECU or
their connector(s) is damaged. If the battery power
supply circuit to the ECU (terminal 5 of the
front-ECU) is damaged, also check the power supply
circuit from the ignition switch (IG2) (terminal 22 of
the front-ECU), and repair if necessary.
.
TROUBLESHOOTING HINTS
The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector
The front-ECU may be defective
The ETACS-ECU may be defective