Mitsubishi Grandis. Manual - part 120

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-477

NOTE: 

Prior to the wiring harness inspection, check 
intermediate connector C-16 (front: RH <LH drive 
vehicles>, front: LH <RH drive vehicles>, rear: RH 
and tailgate) or G-14 (tailgate) and junction block 
connector C-210 (rear: LH) and repair if necessary.

• Check the input line for open circuit.

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the wiring harness between each of 
the door switches and the ETACS-ECU.

Step 6. Retest the system.
Check that all the all door switch signals are received 
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.

AC312033

Connector: C-16 <LHD>

AB

9

21

33

35

24

12

3 4

7

8

5 6

39

28

41

30

18

4243

31

1920

32

40

29

1617

38

27

15

37

36

26

14

13

25

2

1

34

23

11

10

22

AC312043

Connector: C-16 <RHD>

AH

9

21

33

35

24

12

3 4

7

8

5 6

39

28

41

30

18

4243

31

1920

32

40

29

1617

38

27

15

37

36

26

14

13

25

2

1

34

23

11

10

22

AC312078

Connector: G-14

AC

2

1

4

3

13

8

11

10

5

7

12

6

14

9

AC312035

Harness side

AC

Connector: C-210 <LHD>

7

15

5

6

1413

2

9

12

4 3

10

11

1

8

Junction block (Front view)

AC312045

Harness side

AC

Connector: C-210 <RHD>

7

15

5

6

1413

2

9

12

4 3

10

11

1

8

Junction block (Front view)

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-478

Inspection Procedure Q-15: The driver's door lock actuator switch signal is not received. <LH drive 
vehicles>

CAUTION

Whenever the ECU is replaced, ensure that the 
input signal circuit is normal.

COMMENTS ON TROUBLE SYMPTOM

Input signal from the driver's door lock actuator is 
used to operate the functions below. If the signal is 
abnormal, these functions will not work normally.

• Key reminder function

• Central door locking

• Keyless entry system

• Interior lamps

POSSIBLE CAUSES

• Malfunction of the front door lock actuator (LH)

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

ETACS-ECU

DOOR LOCK
ACTUATOR
(FRONT: LH)

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

Door Lock Actuator Input Circuit <LHD>

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-479

DIAGNOSTIC PROCEDURE

Step 1. Connector check: F-04 front door lock 
actuator (LH) connector

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the defective connector.

Step 2. Check the front door lock actuator (LH).
Refer to GROUP 42 

− Door 

P.42-38

.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Replace the front door lock actuator (RH).

Step 3. Resistance measurement at the F-04 front 
door lock actuator (LH) connector.

(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Resistance between F-04 front door lock actuator 

(LH) connector terminal No.1 and body earth

OK: 2 

Ω or less

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Go to Step 4.

Step 4. Check the wiring harness between F-04 
front door lock actuator (LH) connector terminal 
No.1 and body earth

NOTE: 

Prior to the wiring harness inspection, check 
intermediate connector C-27, and repair if necessary.

• Check the earth wires for open circuit.

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 : 

Repair the wiring harness.

AC312083

AB

Connector: F-04

Harness side

<LHD>

AC312083

AB

Connector: F-04

Harness side

<LHD>

AC312730AF

Connector F-04
(Harness side)

5

6

4

2

3

1

AC312083

AB

Connector: F-04

Harness side

<LHD>

AC312031

AG

Connector: C-27 <LHD>

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-480

Step 5. Connector check: C-220 ETACS-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the defective connector.

Step 6. Check the wiring harness from F-04 front 
door lock actuator (LH) connector terminal Nos.2 
and 3 to C-220 ETACS-ECU connector terminal 
Nos.35 and 36.

NOTE: 

Prior to the wiring harness inspection, check 
intermediate connector C-27, and repair if necessary.

• Check the input line for open circuit.

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Repair the wiring harness.

Step 7. Retest the system.
Check that the driver's door lock actuator switch 
signal is received 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.

AC312037

Connector: C-220

Junction block (Rear view)

AC

<LHD>

Harness side

AC312083

AB

Connector: F-04

Harness side

<LHD>

AC312037

Connector: C-220

Junction block (Rear view)

AC

<LHD>

Harness side

AC312031

AG

Connector: C-27 <LHD>