Mitsubishi Grandis. Manual — part 272

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-550

DIAGNOSIS PROCEDURE

Step 1. Connector check: C-129 remote
controlled mirror switch connector

Q: Is the check result normal?

YES :

Go to Step 2.

NO :

Repair the connector.

Step 2. Check the remote controlled mirror
switch.

Refer to GROUP 51

− Door mirror

P.51-51

.

Q: Is the check result normal?

YES :

Go to Step 3.

NO :

Replace the remote controlled mirror switch.

Step 3. Resistance measurement at the C-129
remote controlled mirror switch connector.

(1) Disconnect the connector, and measure at the

wiring harness side.

(2) Continuity between C-129 remote controlled

mirror switch connector terminal No.1 and body
earth

OK: 2

Ω or less

Q: Is the check result normal?

YES :

Go to Step 5.

NO :

Go to Step 4.

AC312031

AB

Connector: C-129

Harness side

<LHD>

AC312043AB

Connector: C-129 <RHD>

Harness side

AC312031

AB

Connector: C-129

Harness side

<LHD>

AC312043AB

Connector: C-129 <RHD>

Harness side

AC312730AC

Connector C-129
(Harness side)

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-551

Step 4. Check the wiring harness between C-129
remote controlled mirror switch connector
terminal No.1 and body earth.

NOTE:

Prior to the wiring harness inspection, check joint
connector C-01 <RH drive vehicles>, and repair if
necessary.

• Check the earth wires for open circuit.

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 :

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 connector.

AC312031

AB

Connector: C-129

Harness side

<LHD>

AC312043AB

Connector: C-129 <RHD>

Harness side

AC312043AC

Connector: C-01<RHD>

AC312037

Connector: C-220

Junction block (Rear view)

AC

<LHD>

Harness side

AC312047

Connector: C-220

Junction block (Rear view)

AC

<RHD>

Harness side

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-552

Step 6. Check the wiring harness between C-129
remote controlled mirror switch connector
terminal No.4 and C-220 ETACS-ECU connector
terminal No.24.

• 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. ETACS switch data by using the SWS
monitor

Check the input signal from the remote controlled
mirror switch.

• Ignition switch: ON

• Remote controlled mirror (folding/unfolding)

switch: from OFF to 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.

AC312031

AB

Connector: C-129

Harness side

<LHD>

AC312043AB

Connector: C-129 <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

Item No. Item name

Normal conditions

Item 14

EL RET MIR SW OFF to ON (only

when switch is
operated)

INPUT SIGNAL PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-553

Inspection Procedure Q-22: The interior lamp "all on" or "all off" switch signal is not sent to the
ETACS-ECU.

CAUTION

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

COMMENTS ON TROUBLE SYMPTOM

Input signals from the interior lamp switches are
used to operate the interior lamps. If the signals are
abnormal, the interior lamps will not illuminate and
extinguish normally.

POSSIBLE CAUSES

• Malfunction of the interior lamp

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

ETACS-ECU

ROOM LAMP

NOTE

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

RHD
LHD

Interior Lamp Input Circuit

INTERIOR
LAMP
SWITCH