Mitsubishi 380. Manual - part 84

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.

AC305260

CONNECTOR: F-03

HARNESS SIDE

AC209364

CONNECTOR F-03
(HARNESS SIDE)

AC305260

CONNECTOR: F-03

HARNESS SIDE

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).

54DB014A

CONNECTOR: C-219

JUNCTION BLOCK SIDE

JUNCTION BLOCK

(REAR VIEW)

54DB014A

CONNECTOR: C-219

JUNCTION BLOCK SIDE

JUNCTION BLOCK

(REAR VIEW)

AC305260

CONNECTOR: F-03

HARNESS SIDE

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-

• Refer to configuration diagrams GROUP-

• 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

16DB324A

CONNECTOR: C-204

HARNESS SIDE

INPUT SIGNAL

ETACS-

ECU

COMBINATION

METER

CAN COMMUNICATION LINE

(CAN_L LINE)

CAN COMMUNICATION LINE

(CAN_H LINE)

HAZARD WARNING LIGHT

SWITCH

· TURN-SIGNAL

LIGHT

SWITCH

Turn-signal Lights Indicator Light Circuit

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.

CAUTION

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

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

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