Mitsubishi Grandis. Manual - part 108

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-429

Prior to the wiring harness inspection, check joint 
connector C-116 and C-33 <RH drive vehicles>, 
intermediate connector C-18, junction block 
connectors C-202 and C-203, and repair if 
necessary.

• Check the power supply line to the ignition switch 

(IG1) for open circuit.

Q: Is the check result normal?

AC312033

AD

Connector: C-18 <LHD>

AC312041AB

Connector: C-18 <RHD>

AC312043AI

Connector: C-33 <RHD>

AC312033

AE

Connector: C-116 <LHD>

AC312041AC

Connector: C-116 <RHD>

AC312036

Connectors: C-202, C-203

AB

C-202

Harness side

C-203

C-202

<LHD>

Harness side

C-203

10

1

6

14

5

12

13

4

11

7

2

3

8

9

Junction block (Front view)

AC312046

Connectors: C-202, C-203

AB

Junction block (Front view)

C-202

Harness side

C-203

C-202

<RHD>

Harness side

C-203

10

1

6

14

5

12

13

4

11

7

2

3

8

9

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-430

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. Retest the system.

Check that the back-up lamp 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.

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.

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 fog lamp switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

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) NOT USING SWS MONITOR

54B-431

DIAGNOSTIC 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) NOT USING SWS MONITOR

54B-432

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