Mitsubishi Grandis. Manual - part 122

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-485

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.

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.

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

AC312037

Connector: C-220

Junction block (Rear view)

AC

<LHD>

Harness side

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-486

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.

Step 7. Retest the system.
Check that the passenger's door key switch signal is 
received normally.

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Cope with Intermittent 

Malfunction 

P.00-5

).

NO : 

Replace the ETACS-ECU.

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) NOT USING SWS MONITOR

54B-487

Inspection Procedure Q-16: The passenger’s door 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 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 key 

switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSTIC 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

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-488

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-27, 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.

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.

AC312091

AB

Connector: F-23 <RHD>

Harness side

AC312730AI

Connector F-23
(Harness side)

AC312091

AB

Connector: F-23 <RHD>

Harness side

AC312031

AH

Connector: C-27 <RHD>

AC312047

Connector: C-220

Junction block (Rear view)

AC

<RHD>

Harness side