Mitsubishi Grandis. Manual — part 25

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-97

Step 3. Customize function by using the SWS
monitor.
Use the SWS monitor customize function to confirm
that "DOOR WARN BUZ" is set to "W.FUNCTION".

CAUTION

The SWS monitor must be used in order to
confirm and change that setting. Use the SWS
monitor to confirm and/or change the
customized function.

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Use the SWS monitor customize function to
set "DOOR WARN BUZ" to "W.FUNCTION"
(Refer to GROUP 54C

− Customize function

P.54C-574

).

Step 4. Retest the system.

Check that the door-ajar warning buzzer 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.

Inspection Procedure B-4: Turn-signal lamp operation sound 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 this function in
accordance with the input signals below.

• Ignition switch (IG1)

• Turn-signal lamp switch

• Hazard warning lamp switch

If this function does not work normally, these input
signal circuit(s) or the ETACS-ECU may be
defective. Note that this function can be
disabled/enabled by the customize function (default
setting; disabled). In order to change the setting, the
SWS monitor is required.

POSSIBLE CAUSES

• Malfunction of the column switch

• Malfunction of the hazard warning lamp switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

Turn-Signal Lamp Operation Sound Function

ETACS-ECU

INPUT SIGNAL

·HAZARD WARNING LAMP SWITCH

·IGNITION SWITCH (IG1)

·TURN-SIGNAL SWITCH

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-98

DIAGNOSTIC PROCEDURE

Step 1. Check that the turn-signal lamps operate.
When the turn-signal lamp switch or the hazard
warning lamp switch is operated, check that the
turn-signal lamps flash.

Q: Is the check result normal?

YES :

Go to Step 2.

NO :

First, repair the turn-signal lamp(s) (Refer to
Trouble Symptom Chart

P.54B-74

).

Step 2. Pulse check
Check the input signals below, which are related to
the turn-signal lamp operation sound function.

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

Q: Are the check result normal?

All the signals are received normally. :

Go to Step

3.

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

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

P.54B-420

.

The turn-signal lamp switch (RH) signal is not
received. :

Refer to inspection procedure Q-6 "The

column switch (lighting and turn-signal lamp
and headlamp washer switch) signal is not
received"

P.54B-438

.

The turn-signal lamp switch (LH) signal is not
received. :

Refer to inspection procedure Q-6 "The

column switch (lighting and turn-signal lamp
and headlamp washer switch) signal is not
received"

P.54B-438

.

The hazard warning lamp switch signal is not
received. :

Refer to inspection procedure Q-12

"The hazard warning lamp switch signal is
not received"

P.54B-461

.

Step 3. Customize function by using the SWS
monitor.
Use the SWS monitor customize function to confirm
that "T/SIG.BUZZER" is set to "W.FUNCTION".

CAUTION

The SWS monitor must be used in order to
confirm and change that setting. Use the SWS
monitor to confirm and/or change the
customized function.

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Use the SWS monitor customize function to
set "T/SIG.BUZZER" to "W.FUNCTION"
(Refer to GROUP 54C

− Customize function

P.54C-574

).

Step 4. Retest the system.
Check that the turn-signal lamp operation sound
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 conditions

Ignition switch (IG1)

When turned from ACC
to ON

Turn-signal lamp switch
(RH)

When the turn-signal
lamp switch (RH) is
turned from off to on

Turn-signal lamp switch
(LH)

When the turn-signal
lamp switch (LH) is
turned from off to on

Hazard warning lamp
switch

When the hazard
warning lamp switch is
turned from off to on

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-99

CENTRAL DOOR LOCKING SYSTEM

Inspection Procedure C-1: central door locking system does not work.

CAUTION

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

COMMENT ON TROUBLE SYMPTOM

If the central door locking system does not work at
all, the ETACS-ECU may be defective.

POSSIBLE CAUSES

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Check that the central door locking
system functions by using the front passenger's
key cylinder.
Check that the central door locking system works
normally by means of the front passenger's door key
cylinder.

Q: Is the check result normal?

ETACS-ECU

FUSIBLE
LINK

ALL DOOR LOCK ACTUATOR

Central Door Lock Power Supply Circuit

30

· DOOR LOCK ACTUATOR
(FRONT: LH) <LHD>
· DOOR LOCK ACTUATOR
(FRONT: RH) <RHD>

DOOR
UNLOCK
RELAY

DOOR
LOCK
RELAY

TAILGATE
OPEN RELAY

TAILGATE
LOCK ACTUATOR

J/B SIDE

J/B SIDE

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-100

YES :

Go to Step 2.

NO :

Refer to Inspection Procedure C-2 "The
central door locking system does not
function by using the driver’s door key
cylinder or inside lock knob

P.54C-109

."

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 ETACS-ECU battery power supply
circuit"

P.54B-87

.

Step 3. Connector check: C-219 ETACS-ECU
connector

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Repair the defective connector.

AC310626AD

Connector: C-219 <LHD>
Junction block (Rear view)

Junction block side

AC310620

Connector: C-219

Junction block
(Rear view)

<RHD>

AB

Junction block side