Mitsubishi Grandis. Manual — part 92

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-365

COMMENTS ON TROUBLE SYMPTOM

The ETACS-ECU activates the interior lamps (room
lamp, rear personal lamp, luggage compartment
lamp, door lamps, key cylinder illumination lamp)
according to the input signals below.

• Ignition switch (IG1)

• Door switches

• Tailgate switch

• Door key switch

• Tailgate key switch

• Driver's door lock actuator

• Interior lamp switch

• Multi-purpose fuse No.18

• Key reminder switch <vehicles with keyless entry

system>

• Interior lamp loaded signal <vehicles with keyless

entry system>

If this function does not work normally, these input
signal circuit(s) or the ETACS-ECU may be
defective.

POSSIBLE CAUSES

• Malfunction of the door switches

• Malfunction of the room lamp switches

• Malfunction of the driver's door lock actuator

• Malfunction of the ETACS-ECU

• Malfunction of the key reminder switch

• Damaged harness wires and connectors

DIAGNOSTIC PROCEDURE

Step 1. Check the power supply circuit.
When the ignition switch is turned to the LOCK
(OFF) position, check if the hazard warning lamps
illuminate.

Q: Is the check result normal?

YES :

Go to Step 2.

NO :

Refer to inspection procedure A-2 "Check
the ETACS-ECU battery power supply
circuit

P.54B-87

."

Step 2. Check the illumination of the interior
lamps.
Check that the interior lamps illuminate and
extinguish.
NOTE: Check that the interior lamps illuminate or
extinguish when the interior lamp switches are
operated. For the room lamp and the rear personal
lamps, check they illuminate when the lamp switches
are turned to the ON or DOOR position.

Q: Which of the interior lamp does no illuminate or

extinguish?
All of the interior lamps illuminate and extinguish
normally. :

The procedure is complete.

No lamps illuminate at all. :

Replace the

ETACS-ECU.

When the interior lamp switches are turned to the
ON position, no lamps illuminate at all.

KEY CYLINDER
ILLUMINATION
LAMP

· ROOM LAMP

· DOOR LAMP
· LUGGAGE
COMPARTMENT
LAMP

· REAR PERSONAL
LAMP

J/B SIDE

ETACS-ECU

FUSIBLE
LINK

26

Interior Lamp Circuit <without keyless entry system>

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-366

Alternatively, when the interior lamp switches are
turned to the OFF position, all the interior lamps
illuminate. :

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

."

If the interior lamp switches are turned to the ON
position, none of the room lamp and the rear
personal lamps illuminate at all. :

Go to Step 3.

The room lamp and the rear personal lamps do not
illuminate or extinguish normally when the
switches are at the DOOR position. :

Go to Step 5.

Only the room lamp does not illuminate or
extinguish normally. :

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

."

Only right or left rear personal lamp does not
illuminate or extinguish normally. :

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

."

Only the luggage compartment lamp does not
illuminate or extinguish normally. :

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

."

Only the door lamps do not illuminate or
extinguish normally. :

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

."

Only the key cylinder illumination lamp does not
illuminate or extinguish normally. :

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

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Repair the defective connector.

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-367

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

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-368

NOTE:

Prior to the wiring harness inspection, check
intermediate connector E-11 and junction block
connector C-211, and repair if necessary.

• Check the power supply line for open circuit.

Q: Is the check result normal?

YES :

Replace the ETACS-ECU.

NO :

Repair the wiring harness.

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

AC310652

AB

Connectors: E-02, E-11

Harness side

E-02

E-11

E-02

E-11

<Vehicles with
sunroof-LHD>

AC310656

AB

Connectors: E-02, E-11

Harness side

E-02

E-11

E-02

E-11

<Vehicles with
sunroof-RHD>

AC310623

AC310623

Connector: C-211

AQ

<LHD>

Junction block (Front view)

Harness side

3

1

2

AC310618

AC310618

Connector: C-211 <RHD>

AS

Harness side

Junction block (Front view)

3

1

2