Mitsubishi Grandis. Manual - part 252

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-470

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.

Step 7. SWS monitor data list.
<Selected item> ETACS ECU

• Ignition switch: ON

• Shift lever: N position → R position

OK: Normal condition is displayed.

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 Q-4: The front fog lamp switch signal is not received.

CAUTION

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

Item No.

Item name

Normal condition

Item 41

INHIBITOR SW ON

Front Fog Lamp Switch Input Circuit

ETACS-
ECU

FOG LAMP
SWITCH

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

<RHD>

<LHD>

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-471

COMMENTS ON TROUBLE SYMPTOM

Input signal from the front fog lamp switch is used to 
operate the front fog lamps. If the signal is abnormal, 
the front fog lamps will not illuminate and extinguish 
normally.

POSSIBLE CAUSES

• Malfunction of the front fog lamp switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Connector check: C-130 fog lamp switch 
connector

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the defective connector.

Step 2. Check the front fog lamp switch.

Refer to GROUP 54A 

− Front fog lamp 

P.54A-93

.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Replace the fog lamp switch.

Step 3. Resistance measurement at the C-130 fog 
lamp switch connector.

(1) Remove the fog lamp switch, and measure at the 

wiring harness side.

(2) Resistance between C-130 fog lamp switch 

connector terminal No.2 and body earth

OK: 2 

Ω or less

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Go to Step 4.

AC312031

AF

1

5

6

4 3 2

Connector: C-130 <LHD>

Harness side

AC312043AF

1

5

6

4 3 2

Connector: C-130 <RHD>

Harness side

AC312031

AF

1

5

6

4 3 2

Connector: C-130 <LHD>

Harness side

AC312043AF

1

5

6

4 3 2

Connector: C-130 <RHD>

Harness side

AC312730AE

Connector C-130
(Harness side)

1

5

6

4 3 2

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-472

Step 4. Check the wiring harness from C-130 fog 
lamp switch connector terminal No.2 to body 
earth.

NOTE: 

Prior to the wiring harness inspection, check joint 
connector C-31 <RH drive vehicles>, 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.

Step 5. Connector check: C-221 ETACS-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the defective connector.

AC312031

AF

1

5

6

4 3 2

Connector: C-130 <LHD>

Harness side

AC312043AF

1

5

6

4 3 2

Connector: C-130 <RHD>

Harness side

AC312043AE

Connector: C-31 <RHD>

AC312037

Connector: C-221  <LHD>

Junction block (Rear view)

AD

Harness side

AC312047

Connector: C-221  <RHD>

Junction block (Rear view)

AD

Harness side

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-473

Step 6. Check the wiring harness from C-221 
ETACS-ECU connector No.54 to C-130 fog lamp 
switch connector terminal No.1.

• 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. SWS monitor data list
<Selected item> ETACS ECU

• Ignition switch: ON

• Lighting switch: "TAIL" or "HEAD"

• Front fog lamp switch: OFF → ON

OK: Normal condition is displayed.

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-221  <LHD>

Junction block (Rear view)

AD

Harness side

AC312047

Connector: C-221  <RHD>

Junction block (Rear view)

AD

Harness side

AC312031

AF

1

5

6

4 3 2

Connector: C-130 <LHD>

Harness side

AC312043AF

1

5

6

4 3 2

Connector: C-130 <RHD>

Harness side

Item No.

Item name

Normal condition

Item 36

F.FOG LAMP

OFF 

→ ON