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)