Mitsubishi Grandis. Manual — part 94

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-373

COMMENTS ON TROUBLE SYMPTOM

If the room lamp does not illuminate or extinguish
normally, wiring harness connector(s) or the bulb
may be defective.

POSSIBLE CAUSES

• Malfunction of the interior lamp switches

• Malfunction of the room lamp bulbs

• Malfunction of the rear personal lamp bulbs

• Damaged harness wires and connectors

ETACS-ECU

J/B SIDE

ROOM LAMP

INTERIOR
LAMP
SWITCH

REAR
PERSONAL
LAMP

FOR
SECOND
SEAT: LH

REAR
PERSONAL
LAMP

FOR
SECOND
SEAT: RH

REAR
PERSONAL
LAMP

FOR
THIRD
SEAT: LH

REAR PERSONAL LAMP
(FOR THIRD SEAT: RH)

Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet

Room Lamp and Rear Personal Lamp Circuit

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-374

DIAGNOSTIC PROCEDURE

Step 1. Pulse check
Check the input signals below, which are related to
the room lamp.

OK: The MUT-III sounds or the voltmeter
needle fluctuates.

Q: Is the check result normal?

All the signals are received normally. :

Go to Step

2.

All the door switch signals are not received. :

Refer to inspection procedure Q-14 "All the
door switch signals are not received <LH
drive vehicles>

P.54B-469

or <RH drive

vehicles>

P.54B-469

."

The driver's door lock actuator switch signal is not
received. :

Refer to inspection procedure Q-15

"The driver's door lock actuator switch
signal is not received <LH drive
vehicles>

P.54B-478

or <RH drive

vehicles>

P.54B-481

."

The interior lamp switch signal is not received. :

Refer to inspection procedure Q-22 "The
interior lamp "all on" or "all off" switch signal
is not sent to the ETACS-ECU

P.54B-514

."

Step 2. Retest the system.
Check that the right or left room lamp illuminates
when the interior lamp switch is operated.

Q: Is the check result normal?

YES :

Go to Step 5.

NO :

Go to Step 3.

Step 3. Connector check: C-219 ETACS-ECU
connector, E-02 room lamp connector

Q: Is the check result normal?

System switch

Check condition

Driver's door switch

Driver's door is opened
while all the other doors
are closed.

Passenger’s door switch Passenger's door is

opened while all the
other doors are closed.

Rear door (RH) switch

Rear door (RH) is
opened while all the
other doors are closed

Rear door (LH) switch

Rear door (LH) door is
opened while all the
other doors are closed

Tailgate switch

TAilgate is opened while
all the other doors are
closed

Driver's door lock
actuator switch

When the driver's door is
unlocked or locked

Interior lamp ON switch

When turned from OFF
to ON

Interior lamp OFF switch When turned from ON to

OFF

AC310626

Connector: C-219

Junction block (Rear view)

<LHD>

AB

Junction block side

AC310620

Connector: C-219

Junction block
(Rear view)

<RHD>

AB

Junction block side

AC310651

AD

Connector: E-02 <LHD>

Harness side

AC310655

AE

Connector: E-02 <RHD>

Harness side

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-375

YES :

Go to Step 4.

NO :

Repair the defective connector.

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-376

Step 4. Check the wiring harness from C-219
ETACS-ECU connector terminal No.6 to E-02
room lamp connector terminal No.10.