air condition MITSUBISHI 380 2005 Manual Online

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-238
STEP 2. Check windshield wiper motor connector A-03 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is windshield wiper motor connector A-03 in good
condition?
YES : Go to Step 3.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
P.00E-2. Verify that the windshield wiper operates
normally when the windshield wiper switch is moved
to each position.
STEP 3. Check the windshield wiper motor.
(1) Disconnect windshield wiper motor connector A-03.
(2) Connect a battery to the windshield wiper motor as shown.
Then check the windshield wiper motor operates normally
at high and low speeds.
Q: Does the windshield wiper motor operate normally?
YES : Go to Step 4.
NO : Replace the windshield wiper motor. Verify that the
windshield wiper operates normally when the
windshield wiper switch is moved to each position.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-239
STEP 4. Check front-ECU connector A-12X for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is front-ECU connector A-12X in good condition?
YES : Go to Step 5.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
P.00E-2. Verify that the windshield wiper operates
normally when the windshield wiper switch is moved
to each position.
STEP 5. Check the wiring harness between windshield
wiper motor connector A-03 (terminals 5 and 4) and
front-ECU connector A-12X (terminals 25 and 24).
Q: Is the wiring harness between windshield wiper motor
connector A-03 (terminals 5 and 4) and front-ECU
connector A-12X (terminals 25 and 24) 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 windshield wiper operates normally when the
windshield wiper switch is moved to each position.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-241
TECHNICAL DESCRIPTION (COMMENT)
If the windshield wipers do not stop at predetermined
park position, the windshield wiper motor or the
front-ECU may be defective.
.
TROUBLESHOOTING HINTS
Refer to circuit diagrams GROUP-90
Refer to configuration diagrams GROUP-80
The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector
The windshield wiper motor may be defective
The front-ECU may be defective
DIAGNOSIS
Required Special Tool:
MB991223: Harness Set
STEP1. Check windshield wiper motor connector A-03 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is windshield wiper motor connector A-03 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. Verify that the windshield wiper works
normally.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-244
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 windshield wiper motor
connector A-03 (terminal 3) and the ignition switch
(ACC) 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 windshield wiper works normally.
STEP 5. Check front-ECU connector A-12X for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is front-ECU connector A-12X in good condition?
YES : Go to Step 6.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
P.00E-2. The windshield wiper should stop at the
predetermined park position.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-245
STEP 6. Check the wiring harness between windshield
wiper motor connector A-03 (terminal 2) and front-ECU
connector A-12X (terminal 29).
Q: Is the wiring harness between windshield wiper motor
connector A-03 (terminal 2) and front-ECU connector
A-12X (terminal 29) in good condition?
YES : Replace the front-ECU. The windshield wiper should
stop at the predetermined park position.
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 windshield wiper works normally

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-253
STEP 3. Check the input signal by using "FUNCTION
DIAG." menu of the SWS monitor.
Check the input signals from the following switches:
Ignition switch: ACC
Windshield washer switch: ON
(1) Operate the Diagnostic Tool MB991958 according to the
procedure below to display "F.WIPER WASH."
a. Select "Interactive Diagnosis."
b. Select "System select."
c. Select "SWS."
d. Select "SWS MONITOR."
e. Select "Function Diag."
f. Select "WIPER."
g. Select "F.WIPER WASH."
(2) Check that normal conditions are displayed for the items
described in the table below.
Q: Are normal conditions displayed for "FRONT
WASH.SW" and "FRONT ECU ACK"?
Normal conditions displayed for all the items : Go to
St e p 4 .
Normal condition is not displayed for the "FRONT
WASH.SW" : Replace the column switch. Verify that the
windshield washer works normally.
Normal condition is not displayed for the "FRONT ECU
ACK" : Replace the front-ECU. Verify that the windshield
washer works normally.
STEP 4. Check windshield washer motor connector A-29
for loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is windshield washer motor connector A-29 in good
condition?
YES : Go to Step 5.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
P.00E-2. Verify that the windshield washer works
normally. ITEM NO. ITEM NAME NORMAL
CONDITION
ITEM 09 FRONT WASH.SW ON
ITEM 70 FRONT ECU ACK NORMAL ACK or
HI-BEAM ACK

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-255
STEP 6. Check the ground circuit to the windshield washer
motor. Measure the resistance at the windshield washer
motor connector A-29.
(1) Disconnect windshield washer motor connector A-29 and
measure the resistance available at the wiring harness side
of the connector.
(2) Measure the resistance value between terminal 1 and
ground.
The resistance should be 2 ohms or less.
Q: Is the measured resistance 2 ohms or less?
YES : Go to Step 8.
NO : Go to Step 7.
STEP 7. Check the wiring harness between windshield
washer motor connector A-29 (terminal 1) and ground.
Q: Is the wiring harness between windshield washer motor
connector A-29 (terminal 1) and ground 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 windshield washer works normally.
STEP 8. Check front-ECU connector A-12X for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is front-ECU connector A-12X in good condition?
YES : Go to Step 9.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
P.00E-2. Verify that the windshield washer works
normally.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-256
STEP 9. Check the wiring harness between windshield
washer motor connector A-29 (terminal 2) and front-ECU
connector A-12X (terminal 31).
Q: Is the wiring harness between windshield washer motor
connector A-29 (terminal 2) and front-ECU connector
A-12X (terminal 31) 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 windshield washer works normally.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-263
STEP 3. Check front-ECU connector A-11X for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is front-ECU connector A-11X in good condition?
YES : Go to Step 4.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
P.00E-2. Verify that the taillamps illuminate normally.
STEP 4. Check the battery power supply circuit to the
front-ECU. Measure the voltage at front-ECU connector
A-11X.
(1) Disconnect front-ECU connector A-11X and measure the
voltage available at the relay box side of the connector.
(2) Measure the voltage between terminal 7 and ground.
The voltage should measure approximately 12 volts
(battery positive voltage).
Q: Is the measured voltage approximately 12 volts (battery
positive voltage)?
YES : Replace the front-ECU. Verify that the taillamps
illuminate normally.
NO : Go to Step 5.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-264
STEP 5. Check the wiring harness between front-ECU
connector A-11X (terminal 7) and the battery.
Q: Is the wiring harness between front-ECU connector
A-11X (terminal 7) 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 taillamps illuminate normally.
INSPECTION PROCEDURE H-2: Headlamp and Taillamp: The headlamps (low-beam) do not illuminate
normally.
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
When the lighting switch is set to "HEAD" posi-
tion, the "HEAD" signal is sent through the col-
umn-ECU (incorporated in the column switch) to
the front-ECU. If the front-ECU receives the
"HEAD" signal through the column-ECU, the
front-ECU turns on the headlamp relay (incorpo-
rated in the front-ECU), thus causing the
headlamps to illuminate. The headlamps always
illuminate at low-beam by the headlamp dimmer
switch automatic resetting function.
If the SWS communication line is defective, the
front-ECU operates the headlamps by using the
other communication lines (headlamp backup cir-
cuit) instead of that line.
.
TECHNICAL DESCRIPTION (COMMENT)
If the headlamps (low-beam) do not illuminate nor-
mally, the column switch or the front-ECU may be
defective.
.
TROUBLESHOOTING HINTS
Refer to circuit diagrams GROUP-90
Refer to configuration diagrams GROUP-80
Trouble in input signal system
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
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