Mitsubishi Grandis. Manual — part 26

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-101

Step 4. Check the wiring harness between C-219
ETACS-ECU connector terminal No.2 and fusible
link (30).

NOTE:

Prior to the wiring harness inspection, check
intermediate connector C-125 and junction block
connector C-204, and repair if necessary.

• Check the power supply line for open or short

circuit.

Q: Is the check result normal?

YES :

Go to Step 5.

NO :

Repair the wiring harness.

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

AC310613

AD

Connector: C-125 <LHD>

AC310628AB

Connector: C-125 <RHD>

AC310623

Connector: C-204 <LHD>

AI

Junction block (Front view)

Harness side

C-204(B)

AC310618

Connector: C-204 <RHD>

AI

Junction block (Front view)

Harness side

C-204(B)

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-102

Step 5. Retest the system.

Check that the central door locking system 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 C-2: The central door locking system does not function by using the driver's
door lock switch.

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
normally only when the driver's door lock switch is
operated, the driver's door lock actuator or the
ETACS-ECU may be defective.

POSSIBLE CAUSES

• Malfunction of the driver's door lock actuator

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

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

ETACS-ECU

DOOR
UNLOCK
RELAY

DOOR
LOCK
RELAY

TAILGATE
OPEN RELAY

DRIVER'S
DOOR LOCK
ACTUATOR
SWITCH

INPUT SIGNAL

ALL DOOR LOCK ACTUATOR

TAILGATE
LOCK ACTUATOR

J/B SIDE

Central Door Lock (Driver's Door Lock Actuator Switch) Circuit

FUSIBLE
LINK

30

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-103

DIAGNOSIS PROCEDURE

Step 1. Pulse check
Check the input signal, which is related to the driver's
door lock operation.

OK: The MUT-III sound or the voltmeter
needle fluctuate.

Q: Is the check result normal?

YES :

Go to Step 2.

NO :

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

."

Step 2. Retest the system.
Check that the central door locking system works
normally by the driver's door lock operation.

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 C-3: The central door locking system does not function by using the
passenger's door key cylinder.

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

normally only when the front passenger's key
cylinder is operated, the front passenger's door key
switch or the ETACS-ECU may be defective.

System switch

Check condition

Driver's door lock
actuator switch

When the driver's key
cylinder or inside lock
knob is unlocked or
locked

ETACS-ECU

FUSIBLE
LINK

ALL DOOR LOCK ACTUATOR

INPUT SIGNAL

Central Door Lock (Door Key Switch) Circuit

FRONT
PASSENGER'S
DOOR KEY
SWITCH

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

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-104

POSSIBLE CAUSES

• Malfunction of the front passenger's door key

switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Pulse check
Check the input signal, which is related to the front
passenger's door key cylinder operation.

OK: The MUT-III sound or the voltmeter
needle fluctuate.

Q: Is the check result normal?

YES :

Go to Step 2.

NO :

Refer to inspection procedure Q-15 "The
front passenger’s door lock actuator signal
is not received <LH drive
vehicles>

P.54B-478

or <RH drive

vehicles>

P.54B-481

."

Step 2. Retest the system.
Check that the central door locking system works
normally by the front passenger's key cylinder
operation.

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

Front passenger's door
key cylinder

When the front
passenger’s key cylinder
is unlocked or locked