Mitsubishi Grandis. Manual - part 253

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-474

Inspection Procedure Q-5: The driver's door 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 switch is used to 
operate the functions below. If the signal is abnormal, 
these functions will not work normally.

• Lamp reminder function

• Door-ajar warning buzzer

• Keyless entry system

• Sunroof timer

• Electric retractable remote controlled door mirror

• Ignition key cylinder illumination lamp

• Headlamp automatic-shutdown

• Interior lamp

• Interior lamp automatic-shutdown

• Door-ajar warning lamp

POSSIBLE CAUSES

• Malfunction of the driver's door switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Check the installation condition.

Check that the front door switch (LH) is installed on 
the body correctly.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Correct the installation condition.

Step 2. Connector check: D-17 front door switch 
(LH) connector

Q: Is the check result normal?

Driver's Door Switch Input Circuit <LHD>

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

FRONT DOOR
SWITCH (LH)

ETACS-ECU

J/B SIDE

AC312053

Connector: D-17 <LHD>

AB

3 2 1

Harness side

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-475

YES : 

Go to Step 3.

NO : 

Repair the defective connector.

Step 3. Check the front door switch (LH).

Refer to GROUP 42 

− Door 

P.42-32

.

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Replace the front door switch (LH).

Step 4. Connector check: C-219 ETACS-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair the defective connector.

Step 5. Check the wiring harness between D-17 
front door switch (LH) connector terminal No.1 
and C-219 ETACS-ECU connector terminal No.10.

NOTE: 

Prior to the wiring harness inspection, check joint 
connector C-210, 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.

Step 6. SWS monitor data list.
<Selected item> ETACS ECU

• Driver's door: close → open

OK: Normal condition is displayed.

Q: Is the check result normal?

AC312037

Connector: C-219

Junction block (Rear view)

Junction block side

AB

3

1

2

14

4

5

7 6

8

1110 9

1312

17

15

16

18

19

20

<LHD>

Item No.

Item name

Normal 
condition

Item 32

DR DOOR SW

OFF 

→ ON

AC312053

Connector: D-17 <LHD>

AB

3 2 1

Harness side

AC312037

Connector: C-219

Junction block (Rear view)

Junction block side

AB

3

1

2

14

4

5

7 6

8

1110 9

1312

17

15

16

18

19

20

<LHD>

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)

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-476

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 Q-5: The driver's door switch signal is not received. <RH 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 switch is used to 
operate the functions below. If the signal is abnormal, 
these functions will not work normally.

• Lamp reminder function

• Door-ajar warning buzzer

• Keyless entry system

• Sunroof timer

• Electric retractable remote controlled door mirror

• Ignition key cylinder illumination lamp

• Headlamp automatic-shutdown

• Interior lamp

• Interior lamp automatic-shutdown

• Door-ajar warning lamp

POSSIBLE CAUSES

• Malfunction of the driver's door switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Check the installation condition.

Check that the front door switch (RH) is installed on 
the body correctly.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Correct the installation condition.

Driver's Door Switch Input Circuit <RHD>

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

FRONT DOOR
SWITCH (RH)

ETACS-ECU

J/B SIDE

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-477

Step 2. Connector check: D-02 front door switch 
(RH) connector

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair the defective connector.

Step 3. Check the front door switch (RH).

Refer to GROUP 42 

− Door 

P.42-32

.

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Replace the front door switch (RH).

Step 4. Connector check: C-219 ETACS-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair the defective connector.

Step 5. Check the wiring harness between D-02 
front door switch (RH) connector terminal No.1 
and C-219 ETACS-ECU connector terminal No.10.

NOTE: 

Prior to the wiring harness inspection, check joint 
connector C-210, 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.

Step 6. SWS monitor data list.
<Selected item> ETACS ECU

• Driver's door: close → open

OK: Normal condition is displayed.

Q: Is the check result normal?

AC312058

AB

Harness side

Connector: D-02 <RHD>

AC312047

Connector: C-219

Junction block (Rear view)

Junction block side

AB

3

1

2

14

4

5

7 6

8

1110 9

1312

17

15

16

18

19

20

<RHD>

Item No.

Item name

Normal 
condition

Item 32

DR DOOR SW

OFF 

→ ON

AC312058

AB

Harness side

Connector: D-02 <RHD>

AC312047

Connector: C-219

Junction block (Rear view)

Junction block side

AB

3

1

2

14

4

5

7 6

8

1110 9

1312

17

15

16

18

19

20

<RHD>

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)