Mitsubishi Grandis. Manual - part 123

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-489

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.33 
and 34.

NOTE: 

Prior to the wiring harness inspection, check 
intermediate connector C-27, 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.

AC312091

AB

Connector: F-23 <RHD>

Harness side

AC312047

Connector: C-220

Junction block (Rear view)

AC

<RHD>

Harness side

AC312031

AH

Connector: C-27 <RHD>

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-490

Inspection Procedure Q-17: The tailgate key switch signal is not detected.

CAUTION

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

COMMENTS ON TROUBLE SYMPTOM

Input signal from the tailgate 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 tailgate key switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSTIC PROCEDURE

Step 1. Connector check: G-16 tailgate key 
switch connector

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the defective connector.

TAILGATE
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   

Tailgate Key Switch Input Circuit

AC312078

Connector: G-16

Harness side

AD

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-491

Step 2. Check the tailgate key switch.
Refer to GROUP 42 

− Tailgate 

P.42-51

.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Replace the tailgate lock key switch.

Step 3. Resistance measurement at the G-16 
tailgate key switch connector.

(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Resistance between G-16 tailgate key 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.

Step 4. Check the wiring harness between G-16 
tailgate key switch connector terminal No.2 and 
body earth.

NOTE: 

Prior to the wiring harness inspection, check 
intermediate connector G-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.

AC312078

Connector: G-16

Harness side

AD

AC312730AK

Connector G-16
(Harness side)

AC312078

Connector: G-16

Harness side

AD

AC312078

Connector: G-14

AC

2

1

4

3

13

8

11

10

5

7

12

6

14

9

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) NOT USING SWS MONITOR

54B-492

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.

AC312037

Connector: C-220

Junction block (Rear view)

AC

<LHD>

Harness side

AC312047

Connector: C-220

Junction block (Rear view)

AC

<RHD>

Harness side