2005 MITSUBISHI 380 air condition

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-333
STEP 34. Check the ground circuit to the rear turn-signal
lamp (RH). Measure the resistance at rear combination
lamp (RH) connector F-03.
(1) Disconnect rear combination lamp (RH) connector F-03 and
measure the resistance available at the harness side of the
connector.
(2) Measure the resistance value between terminal 2 and
ground.
The resistance should be 2 ohms or less.
Q: Is the measured resistance 2 ohms or less?
YES : Go to Step 36.
NO : Go to Step 35.
STEP 35. Check the wiring harness between rear
combination lamp (RH) connector F-03 (terminal 2) and
ground.
Q: Is the wiring harness between rear combination lamp
(RH) connector F-03 (terminal 2) and ground in good
condition?
YES : Replace the rear combination lamp socket assembly
(RH). Verify that the turn-signal lamps illuminate
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 turn-signal lamps illuminate normally.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-334
STEP 36. Check ETACS-ECU connector C-219 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is ETACS-ECU connector C-219 in good condition?
YES : Go to Step 37.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
P.00E-2. Verify that the turn-signal lamps illuminate
normally.
STEP 37. Check the wiring harness between rear
combination lamp (RH) connector F-03 (terminal 5) and
ETACS-ECU connector C-219 (terminal 9).

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-335
NOTE: Also check junction block connector C-204 for loose,
corroded, or damaged terminals, or terminals pushed back in
the connector. If junction block connector C-204 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 rear combination lamp
(RH) connector F-03 (terminal 5) and ETACS-ECU
connector C-219 (terminal 9) in good condition?
YES : Replace the rear combination lamp socket assembly
(RH). Verify that the turn-signal lamps illuminate
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 turn-signal lamps illuminate normally.
INSPECTION PROCEDURE I-4: The turn-signal lamp indicator does 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
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.
.
TECHNICAL DESCRIPTION (COMMENT)
If the turn-signal indicator does not illuminate nor-
mally, connector(s), wiring harness in the CAN bus
lines, the ETACS-ECU or the combination meter 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 combination meter may be defective
The ETACS-ECU may be defective
.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-336
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: Test Probe Harness
STEP 1. Check the turn-signal lamps.
When the column switch or the hazard warning lamp switch are
operated, check that the turn-signal lamps illuminate and go off
normally.
Q: Are the turn-signal lamps in good condition?
YES : Go to Step 2.
NO : First, repair the turn-signal lamp(s). Refer to
Inspection Procedure I-3 "One of the turn-signal
lamps does not illuminate P.54B-316."
STEP 2. Using Diagnostic Tool MB991958, diagnose the
CAN bus line.
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) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the CAN bus line found to be normal?
YES : Go to Step 3.
NO : Repair the CAN bus line (Refer to GROUP 54C,
Diagnosis P.54C-15).

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-342
STEP 3. Check fog lamp relay connector A-05X for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is fog lamp relay connector A-05X 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 fog lamps illuminate normally.
STEP 4. Check the fog lamp relay.
Q: Is the fog lamp relay in good condition?
YES : Go to Step 5.
NO : Replace the fog lamp relay. Verify that the fog lamps
illuminate normally.
BATTERY VOLTAGE TESTER
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-343
STEP 5. Check the battery power supply circuit to the fog
lamp relay. Measure the voltage at fog lamp relay
connector A-05X.
The top and bottom of the fog lamp relay are difficult to
identify. Prior to inspection, confirm the triangle mark on
the relay box.
(1) Disconnect fog lamp relay connector A-05X 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 7.
NO : Go to Step 6.
STEP 6. Check the wiring harness between fog lamp relay
connector A-05X (terminals 1 and 2) and the battery.
Q: Is the wiring harness between fog lamp relay connector
A-05X (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 fog lamps illuminate normally.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-344
STEP 7. 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 8.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
P.00E-2. Verify that the fog lamps illuminate normally.
STEP 8. Check the wiring harness between fog lamp relay
connector A-05X (terminal 3) and front-ECU connector
A-11X (terminal 11).
Q: Is the wiring harness between fog lamp relay connector
A-05X (terminal 3) and front-ECU connector A-11X
(terminal 11) in good condition?
YES : Go to Step 9.
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 fog lamps illuminate normally.
STEP 9. Replace the ECU.
(1) Replace the front-ECU.
(2) The fog lamps should illuminate normally.
Q: Do the fog lamps illuminate normally?
YES : No action is necessary and testing is complete.
NO : Replace the ETACS-ECU. Verify that the fog lamps
illuminate normally.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-346
STEP 1. Verify that the fog lamps and the fog lamp
indicator lamp illuminate.
Q: Do the fog lamps and the fog lamp indicator lamp
illuminate normally?
Only the fog lamp (LH) does not illuminate : Go to Step
2.
Only the fog lamp (RH) does not illuminate : Go to Step
8.
Only the fog lamp indicator does not illuminate : Refer
to Inspection Procedure J-4 "The fog lamp indicator
does not illuminate normally P.54B-350."
Both of the fog lamps do not illuminate : Refer to
Inspection Procedure J-1 "Fog lamps do not
illuminate when the fog lamp switch is turned on
P.54B-340."
STEP 2. Check fog lamp (LH) connector A-22 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is fog lamp (LH) connector A-22 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. Check that the fog lamps illuminate
normally.
STEP 3. Check the fog lamp bulb (LH).
(1) Remove the fog lamp bulb (LH).
(2) Verify that the fog lamp bulb (LH) is not damaged or burned
out.
Q: Is the fog lamp bulb (LH) in good condition?
YES : Go to Step 4.
NO : Replace the fog lamp bulb (LH). Verify that the fog
lamps illuminate normally.