Mitsubishi Grandis. Manual - part 258

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-494

DIAGNOSIS PROCEDURE

Step 1. Connector check: C-308 key reminder 
switch connector

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the defective connector.

Step 2. Check the key reminder switch.

Refer to GROUP 54A 

− Ignition switch 

P.54A-31

.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Replace the key reminder switch.

Step 3. Resistance measurement at the C-308 key 
reminder switch connector.

(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Resistance between C-308 key reminder switch 

connector terminal No.4 and body earth

OK: 2 

Ω or less

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Go to Step 4.

AC312039

2
7 6

1
3

5 4

Connector: C-308 <LHD>

AB

Harness side

AC312049

2
7 6

1
3

5 4

Connector: C-308 <RHD>

AB

Harness side

AC312039

2
7 6

1
3

5 4

Connector: C-308 <LHD>

AB

Harness side

AC312049

2
7 6

1
3

5 4

Connector: C-308 <RHD>

AB

Harness side

AC312730AB

Connector C-308
(Harness side)

2
7 6

1
3

5 4

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-495

Step 4. Check the wiring harness between C-308 
key reminder switch connector terminal No.4 and 
the body earth.

• 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-220 ETACS-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the defective connector.

AC312039

2
7 6

1
3

5 4

Connector: C-308 <LHD>

AB

Harness side

AC312049

2
7 6

1
3

5 4

Connector: C-308 <RHD>

AB

Harness side

AC312037

Connector: C-220

Junction block (Rear view)

AC

<LHD>

Harness side

AC312047

Connector: C-220

Junction block (Rear view)

AC

<RHD>

Harness side

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-496

Step 6. Check the wiring harness between C-308 
key reminder switch connector terminal No.6 and 
C-220 ETACS-ECU connector terminal No.30.

• 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. ETACS switch data by using the SWS 
monitor

Check the input signal from the key reminder switch.

• key reminder switch: OFF (key inserted) to ON 

(key removed)

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-220

Junction block (Rear view)

AC

<LHD>

Harness side

AC312047

Connector: C-220

Junction block (Rear view)

AC

<RHD>

Harness side

AC312039

2
7 6

1
3

5 4

Connector: C-308 <LHD>

AB

Harness side

AC312049

2
7 6

1
3

5 4

Connector: C-308 <RHD>

AB

Harness side

Item No.

Item name

Normal 
condition

Item 03

KEY REMIN SW

from OFF to ON

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-497

Inspection Procedure Q-12: The hazard warning lamp switch signal is not received.

CAUTION

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

ETACS-
ECU

HAZARD
WARNING
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

Hazard Warning Lamp Switch Input Circuit <LHD>