Mitsubishi Grandis. Manual — part 213

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-314

Inspection Procedure M-9:Daytime running lamp function does not work normally.

CAUTION

Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.

COMMENTS ON TROUBLE SYMPTOM

If the daytime running lamp function is not operating
normally the ETACS-ECU power circuit may be
defective or the ETACS-ECU may be defective.

POSSIBLE CAUSES

• The ETACS-ECU may be defective

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Check that the headlamps operate.

Do the low-beam headlamps illuminate when the
lighting switch is turned to the HEAD position?

Q: Is the check result normal?

YES :

Go to Step 2.

NO :

First, repair the headlamps. Refer to
Inspection Procedure M-2 "The low-beam
headlamps do not illuminate normally

P.54C-275

."

Step 2. SWS monitor data list.

Check the input signals below, which are related to
the interior lamp automatic-shutdown function.

<Selected item> ETACS ECU

• Ignition switch: ON

OK: Normal condition is displayed.

Q: Is the check result normal?

YES :

Go to Step 3.

NO :

Refer to inspection procedure Q-2 "The
ignition switch (IG1) signal is not received

P.54C-460

."

JUMPER
CONNECTOR

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

Daytime Running Lamp Input Circuit

Item No.

Item name

Normal condition

Item 30

IG SW(IG1)

ON

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-315

Step 3. ECU check by using the SWS monitor.

Check that the power supply and earth lines to the
ETACS-ECU and the SWS communication lines are
normal.

• Ignition switch: OFF

ECUS TO BE CHECKED

• ETACS ECU

OK: "OK" is displayed on the "ETACS ECU"
menu.

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Refer to Inspection Procedure A-3
"Communication with the ETACS-ECU is
not possible

P.54C-63

."

Step 4. ETACS switch data by using the SWS
monitor

Check the ETACS-ECU signal related to the daytime
running lamp operation.

OK: Normal condition is displayed.

Q: Is the check result normal?

YES :

Replace the ETACS-ECU.

NO :

Go to Step 5.

Step 5. Connector check: C-221 ETACS-ECU
connector.

Q: Is the check result normal?

YES :

Go to Step 6.

NO :

Repair the defective connector.

Step 6. Resistance measurement at the C-221
ETACS-ECU connector.
(1) Disconnect the connector, and measure at the

wiring harness side.

(2) Check the resistance between the ETACS-ECU

connector and body earth.

• Resistance between C-221 ETACS-ECU

connector terminal No.64 and body earth

OK: 2

Ω or less

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 :

Go to Step 7.

Step 7. Check the wiring harness from C-221
ETACS-ECU connector terminal No.64 to body
earth.
NOTE: Prior to the wiring harness inspection, check
jumper connector C-101, and repair if necessary.

• Check the earth wires for open circuit.

Q: Is the check result normal?

YES :

Replace the ETACS-ECU.

NO :

Repair the wiring harness.

INSPECTION PROCEDURE M-10: The headlamps do not illuminate when the lamping switch is at
"TAIL" or "PASSING" position, but illuminate only at low beam when the switch is at "HEAD" position.
However, the headlamps do not illuminate at high beam.

CAUTION

Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.

COMMENTS ON TROUBLE SYMPTOM

If the headlamps illuminate only at low beam
regardless of the lighting switch position, the
headlamp fail-safe function may be activated.

POSSIBLE CAUSES

• Malfunction of the column switch

• Malfunction of the front-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. ECU check by using the SWS monitor.

Check that the power supply and earth lines to the
column switch (column-ECU) and the front-ECU and
the SWS communication lines are normal.

• Ignition switch: OFF

ECUS TO BE CHECKED

• COLUMN ECU

• FRONT ECU

OK: "OK" are displayed for all the items

Q: Are the check result normal?

Item No.

Item name

Normal condition

Item 35

DRL

ON

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-316

"OK" are displayed for all the items :

Go to Step 2.

"NG" is displayed on the "COLUMN ECU" menu. :

Refer to Inspection Procedure A-2
"Communication with the column switch
(column-ECU) is not possible

P.54C-56

."

"NG" is displayed on the "FRONT ECU" menu. :

Refer to Inspection Procedure A-4
"Communication with the front-ECU is not
possible

P.54C-70

."

Step 2. Retest the system.

Check that the headlamps illuminate normally.

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 column switch.

FLASHER TIMER

Inspection Procedure N-1: The turn-signal lamps do not illuminate.

CAUTION

Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.

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

ETACS-ECU

J/B SIDE

RELAY
BOX

TURN-SIGNAL
LAMP RELAY: LH

TURN-SIGNAL
LAMP RELAY: RH

FRONT TURN-SIGNAL
LAMP (LH)

REAR TURN-
SIGNAL LAMP

SIDE TURN-
SIGNAL LAMP

FRONT TURN-
SIGNAL LAMP (RH)

FUSIBLE
LINK

26

Turn-Signal Lamp Power Supply Circuit

SYMPTOM PROCEDURES

SMART WIRING SYSTEM (SWS) USING SWS MONITOR

54C-317

COMMENTS ON TROUBLE SYMPTOM

If all the turn-signal lamps do not illuminate, the
ignition switch (IG1), the turn-signal lamp switch
input circuit or the ETACS-ECU may be defective.

POSSIBLE CAUSES

• Malfunction of the column switch

• Malfunction of the ETACS-ECU

• Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. ECU check by using the SWS monitor.

Check that the power supply and earth lines to the
ETACS-ECU and the SWS communication lines are
normal.

• Ignition switch: OFF

ECU TO BE CHECKED

• ETACS ECU

OK: "OK" is displayed on the "ETACS ECU"
menu.

Q: Is the check result normal?

YES :

Go to Step 2.

NO :

Refer to Inspection Procedure A-3
"Communication with the ETACS-ECU is
not possible

P.54C-63

."

Step 2. Check that the hazard warning lamps
operate.

Check that the hazard warning lamps illuminate
normally.

Q: Is the check result normal?

YES :

Go to Step 6.

NO :

Go to Step 3.

Step 3. Connector check: C-219 ETACS-ECU
connector.

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Repair the defective connector.

Step 4. Voltage measurement at the C-219
ETACS-ECU connector.

(1) Remove the ETACS-ECU, and measure at the

AC310626

Connector: C-219

Junction block (Rear view)

<LHD>

AB

Junction block side

AC310620

Connector: C-219

Junction block
(Rear view)

<RHD>

AB

Junction block side

AC310626

Connector: C-219

Junction block (Rear view)

<LHD>

AB

Junction block side

AC310620

Connector: C-219

Junction block
(Rear view)

<RHD>

AB

Junction block side