Mitsubishi Grandis. Manual - part 265

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-522

POSSIBLE CAUSES

• Malfunction of the front passenger's door lock key 

switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Connector check: F-23 door key switch 
connector

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the defective connector.

Step 2. Check the door key switch.

Refer to GROUP 42 

− Door 

P.42-38

.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Replace the door key switch.

Step 3. Resistance measurement at the F-23 door 
key switch connector.

(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Resistance between F-23 door key switch 

connector terminal No.3 and body earth

OK: 2 

Ω or less

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Go to Step 4.

Step 4. Check the wiring harness between F-23 
door key switch connector terminal No.3 and 
body earth.

NOTE: 

Prior to the wiring harness inspection, check 
intermediate connector C-14, and repair if necessary.

• Check the earth wires for open circuit.

Q: Is the check result normal?

YES : 

Intermittent malfunction. (Refer to GROUP 

00 

− How to Cope with Intermittent 

Malfunction 

P.00-5

).

NO : 

Repair the wiring harness.

AC312085

Connector: F-23 <LHD>

Harness side

AB

AC312085

Connector: F-23 <LHD>

Harness side

AB

AC312730AI

Connector F-23
(Harness side)

AC312085

Connector: F-23 <LHD>

Harness side

AB

AC312033

Connector: C-14 <LHD>

AC

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-523

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.

Step 6. Check the wiring harness from F-23 door 
key switch connector terminal Nos.1 and 2 to 
C-220 ETACS-ECU connector terminal Nos.34 
and 33.

NOTE: 

Prior to the wiring harness inspection, check 
intermediate connector C-14, and repair if necessary.

• Check the input line for open circuit.

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Repair the wiring harness.

AC312037

Connector: C-220

Junction block (Rear view)

AC

<LHD>

Harness side

AC312085

Connector: F-23 <LHD>

Harness side

AB

AC312037

Connector: C-220

Junction block (Rear view)

AC

<LHD>

Harness side

AC312033

Connector: C-14 <LHD>

AC

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-524

Step 7. ETACS switch data by using the SWS 
monitor

Check the input signal from the passenger’s door 
lock key switch.

• passenger’s door lock key cylinder: Neutral to 

lock

• Passenger’s door lock key cylinder: Neutral to 

unlock

OK: Normal conditions are displayed for all 
the items.

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.

Item No.

Item name

Normal 
condition

Item 26

CNTR DOOR LCK

ON (only 
when 
operated 
to lock)

Item 27

CNTR DOOR ULCK

OFF

Item No.

Item name

Normal 
condition

Item 26

CNTR DOOR LCK

OFF

Item 27

CNTR DOOR ULCK

ON (only 
when 
operated 
to unlock)

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-525

Inspection Procedure Q-16: The passenger’s door lock key switch signal is not detected. <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 front passenger's door lock key 
switch is used to operate the central door locking 
function. If the signal is abnormal, the central door 
locking function will not work normally.

POSSIBLE CAUSES

• Malfunction of the front passenger's door lock key 

switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Connector check: F-23 door key switch 
connector

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the defective connector.

Door Lock Key Cylinder Switch Input Circuit <RHD>

DOOR KEY
SWITCH

ETACS-ECU

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

AC312091

AB

Connector: F-23 <RHD>

Harness side