Mitsubishi Grandis. Manual - part 250

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-462

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 4. SWS monitor data list.
<Selected item> ETACS ECU

• Ignition switch: ACC → ON

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.

Item No.

Item name

Normal 
condition

Item 30

IG SW(IG1)

OFF 

→ ON

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-463

Inspection Procedure Q-3: The back-up lamp switch signal is not received. <M/T>

CAUTION

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

Back-up Lamp Switch Input Circuit <LHD>

IGNITION
SWITCH (IG1)

BACK-UP
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

BACK-UP
LAMP

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-464

COMMENTS ON TROUBLE SYMPTOM

Input signal from the back-up lamp switch is used to 
operate the rear wiper. If the signal is abnormal, the 
rear wiper will not work normally.

POSSIBLE CAUSES

• Malfunction of the back-up lamp switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

Back-up Lamp Switch Input Circuit <RHD>

IGNITION
SWITCH (IG1)

BACK-UP
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

BACK-UP
LAMP

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-465

DIAGNOSIS PROCEDURE

Step 1. Connector check: B-110 back-up lamp 
switch connector and C-220 ETACS-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the defective connector.

Step 2. Check the back-up lamp switch

Check the back-up lamp switch (Refer to GROUP 
22B 

− Transmission 

P.22B-17

).

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Replace the inhibitor switch.

Step 3. Voltage measurement at the C-220 
ETACS-ECU connector.

(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Ignition switch: ON
(3) Shift position: R position

(4) Voltage between C-220 ETACS-ECU connector 

terminal No.39 and body earth

OK: System voltage

Q: Is the check result normal?

YES : 

Replace the ETACS-ECU.

NO : 

Go to Step 4.

AC312663

Connector: B-110 <LHD>

AB

Harness side

AC312667

Connector: B-110 <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

AC312037

Connector: C-220

Junction block (Rear view)

AC

<LHD>

Harness side

AC312047

Connector: C-220

Junction block (Rear view)

AC

<RHD>

Harness side

AC312731

AC312731AD

Connector C-220
(Harness side)