Mitsubishi Lancer Evolution IX. Manual — part 167

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-231

Step 14. Connector check: C-226 ETACS-ECU
connector

Q: Is the check result normal?

YES :

Go to Step 15.

NO :

Repair the defective connector.

Step 15. Check the wiring harness from C-226
ETACS-ECU connector terminal No.6 to F-02
luggage compartment lamp connector terminal
No.1.

AC310450

Connector: C-226

AB

Junction block side

Junction block (rear view)

<LHD>

AC310461

Junction block (rear view)

Connector: C-226

AB

<RHD>

Junction block side

AC310450

Connector: C-226

AB

Junction block side

Junction block (rear view)

<LHD>

AC310461

Junction block (rear view)

Connector: C-226

AB

<RHD>

Junction block side

AC310467

Connector: F-02

Harness side

AB

<LHD>

AC310469

Connector: F-02

Harness side

AB

<RHD>

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-232

NOTE:

Prior to the wiring harness inspection, check junction
block connector C-217, and repair if necessary.

• Check the power supply line for open circuit.

Q: Is the check result normal?

YES :

Go to Step 16.

NO :

Repair the wiring harness.

Step 16. Retest the system.
Check that the luggage compartment lamp illumi-
nates and extinguishes normally.

Q: Is the check result normal?

YES :

The trouble can be an intermittent

malfunction (Refer to GROUP 00

− How to

Cope with Intermittent Malfunction

P.00-5

).

NO :

Replace the ETACS-ECU.

AC310448

Harness side

Junction block (front view)

Connector: C-217

AC

<LHD>

AC310458

Harness side

Junction block (front view)

Connector: C-217

AC

<RHD>

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-233

INSPECTION PROCEDURE K-2: Interior lamp automatic shutdown function does not work normally.

CAUTION

Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.

COMMENTS ON TROUBLE SYMPTOM

The ETACS-ECU operates the interior lamp auto-
matic shutdown function in accordance with the input
signals below.

• Ignition switch (ACC)

• Ignition switch (IG1)

• Driver's door switch

• All of the door switches

• Interior lamp loaded signal

If this function does not work normally, these input
signal circuit(s) or the ETACS-ECU may be defec-
tive. Note that this function can be disabled/enabled
by the adjustment function (default setting; enabled).

POSSIBLE CAUSES

• Malfunction of the door switches

• Malfunction of the room lamp

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSTIC PROCEDURE

Step 1. Check the adjustment function.
Check that the interior lamp automatic shutdown
function has been enabled by using the adjustment
function.

Q: Is the check result normal?

YES :

Go to Step 2.

NO :

Enable the interior lamp automatic
shutdown function by using the adjustment
function. Refer to

P.54B-302

.

INPUT SIGNAL

COMBINATION
METER

KEEP RELAY

LOAD
DETERMINATION
CIRCUIT

LOAD
DETERMINATION
CIRCUIT

· ALL DOOR
SWITCH
· DRIVER'S DOOR
SWITCH
· IGNITION
SWITCH (ACC)
· IGNITION
SWITCH (IG1)
· INTERIOR LAMP
LOADED SIGNAL

ETACS-ECU

· FRONT ROOM LAMP
· REAR ROOM LAMP
· LUGGAGE COMPARTMENT LAMP

J/B SIDE

RELAY BOX
(FUSE )

22

Interior Lamp Automatic Shutdown Function Circuit

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-234

Step 2. 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 3.

NO :

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

P.54B-42

."

Step 3. Pulse check
Check the input signals below, which are related to
the front and rear dome lamps.

OK: The M.U.T.-II/III sounds or the voltmeter
needle fluctuates.

Q: Is the check result normal?

All the signals are received normally. :

Go to Step

4.

The ignition switch (ACC) signal is not received. :

Refer to inspection procedure L-1 "The
ignition switch (ACC) signal is not received

P.54B-239

."

The ignition switch (IG1) signal is not received. :

Refer to inspection procedure L-2 "The
ignition switch (IG1) signal is not received

P.54B-242

."

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

Refer to inspection procedure L-3 "The door
switch (front: LH) signal is not received <LH
drive vehicles>

P.54B-244

." Refer to

inspection procedure L-3 "The door switch
(front: RH) signal is not received <RH drive
vehicles>

P.54B-246

."

All the door switch signals are not received. :

Refer to inspection procedure L-10 "All the
door switch signals are not received <LH
drive vehicles>

P.54B-265

." Refer to

inspection procedure L-10 "All the door
switch signals are not received <RH drive
vehicles>

P.54B-268

."

Interior lamp loaded signal is not detected :

Refer

to inspection procedure L-15 "Interior lamp
loaded signal is not detected

P.54B-287

."

Step 4. Retest the system.
Check that the interior lamp automatic shutdown
function works normally.

Q: Is the check result normal?

YES :

The trouble can be an intermittent

malfunction (Refer to GROUP 00

− How to

Cope with Intermittent Malfunction

P.00-5

).

NO :

Replace the ETACS-ECU.

System switch

Check condition

Ignition switch (ACC)

When turned from the
LOCK (OFF) position to
the ACC position

Ignition switch (IG1)

When turned from ACC
to ON

Driver's door switch

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

All of the door switches

A door is opened when
all the doors are closed

Interior lamp loaded
signal

When a load is applied
through multi-purpose
fuse No.18