Mitsubishi Grandis. Manual - part 221

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-346

Step 23. Connector check: C-219 ETACS-ECU 
connector.

Q: Is the check result normal?

YES : 

Go to Step 24.

NO : 

Repair the defective connector.

AC310626

Connector: C-219

Junction block (Rear view)

<LHD>

AB

Junction block side

AC310620

Connector: C-219

Junction block 
(Rear view)

<RHD>

AB

Junction block side

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-347

Step 24. Check the wiring harness from the G-09 
rear turn-signal lamp (RH) connector terminal 
No.1 to C-219 ETACS-ECU connector terminal 
No.9 or G-25 rear turn-signal lamp (LH) 
connector terminal No.1 to C-219 ETACS-ECU 
connector terminal or No.14.

NOTE: 

Prior to the wiring harness inspection, check 
intermediate connector G-21 and junction block 
connector C-210, and repair if necessary.

• Check the output lines for open circuit.

Q: Is the check result normal?

YES : 

Go to Step 25.

NO : 

Repair the wiring harness.

Step 25. Retest the system.

Check that the turn-signal lamps.

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 rear turn-signal lamp assembly.

AC310626

Connector: C-219

Junction block (Rear view)

<LHD>

AB

Junction block side

AC310620

Connector: C-219

Junction block 
(Rear view)

<RHD>

AB

Junction block side

AC310222

Connector: G-09

AG

Harness side

G-09 (B)

AC310220

Connector: G-25

AF

G-25 (B)

Harness side

AC310623

Connector: C-210 <LHD>

AS

Harness side

Junction block (Front view)

AC310618

Connector: C-210 <RHD>

AQ

Harness side

Junction block (Front view)

AC310220

Connector: G-21 <LHD>

AC

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-348

Inspection Procedure N-4: The turn-signal indicator lamp does not illuminate.

CAUTION

Whenever the ECU is replaced, ensure that the 
input and output signal circuits are normal.

COMMENTS ON TROUBLE SYMPTOM

If the turn-signal indicator lamp does not illuminate 
normally, connector(s), wiring harness in the CAN 
bus lines, the ETACS-ECU or the combination meter 
may be defective.

POSSIBLE CAUSES

• The combination meter may be defective

• The ETACS-ECU may be defective

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Check that the hazard warning lamps 
operate.

Check that the hazard warning lamps illuminate 
normally.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

First, repair the headlamps. Refer to 
Inspection Procedure N-2 "The hazard 
warning lamps do not illuminate normally 

P.54C-321

."

Step 2. MUT-III CAN bus diagnostics.

Use the MUT-III to diagnose the CAN bus lines.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair the CAN bus line (Refer to GROUP 
54D, Diagnosis 

P.54D-16

).

Step 3. Check for combination meter diagnosis 
code.

Check whether the combination meter-related 
diagnosis code is set.

Q: Is the diagnosis code set?

YES : 

Diagnose the combination meter (Refer to 

GROUP 54A 

− Troubleshooting 

P.54A-35

).

NO : 

Go to Step 4.

Step 4. MUT-III actuator test

Perform the actuator test for the combination meter, 
and check that the turn-signal indicator lamps 
illuminate (Refer to GROUP 54A 

− Combination 

Meter 

P.54A-78

).

Q: Is the check result normal?

YES : 

Replace the ETACS-ECU.

NO : 

Replace the combination meter.

INPUT SIGNAL

ETACS-ECU

COMBINATION
METER

CAN COMMUNICATION LINE
(CAN_L LINE)

CAN COMMUNICATION LINE
(CAN_H LINE)

· TURN-SIGNAL LAMP SWITCH
· HAZERD WARNING LAMP SWITCH

Turn-Signal Indicator Lamp Circuit

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-349

FOG LAMP

Inspection Procedure O-1: The front fog lamps do not illuminate normally.

CAUTION

Whenever the ECU is replaced, ensure that the 
input and output signal circuits are normal.

POSSIBLE CAUSES

• Malfunction of the column switch

• Malfunction of the front fog lamp switch

• Malfunction of the front-ECU

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Check that the tail/stop lamps and 
headlamps operate.

Check that the tail/stop lamps and headlamps 
illuminate normally.

Q: Is the check result normal?

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   

RELAY
BOX

FRONT FOG
LAMP RELAY

FRONT-ECU

FRONT
FOG LAMP
(LH)

FRONT
FOG LAMP
(RH)

FUSIBLE
LINK

26

Front Fog Lamp Circuit