Mitsubishi Lancer (4A9 engine). Manual — part 221

ETACS

CHASSIS ELECTRICAL

54A-546

281

ASC/TCL OFF switch

ASC OFF switch: During ON
operation

ON

Other than above

OFF

283

ESS cancel switch

Not used

OFF

287

Starter switch

Ignition switch: START position ON
Ignition switch: Other than
START position

OFF

288

ACC switch

Ignition switch: ACC or ON
position

ON

Ignition switch: Other than ACC
and ON position

OFF

289

Backup lamp or shift reveres SW

Shift lever is in reverse position ON
Other than above

OFF

290

Brake switch

Brake pedal depressed

ON

Other than above

OFF

291

Front wiper auto stop switch

When windshield wipers are in
operation

ON

Other than above

OFF

292

Rear wiper auto stop switch

When rear wiper is in operation ON
Other than above

OFF

293

Process error information

−

−

294

Process error

−

0

−255 times

340

Head lamp switch(tail)

Lighting switch: Position lamp
position

ON

Other than above

OFF

341

Head lamp switch

Lighting switch: During dimmer
switch operation

ON

Other than above

OFF

342

Head lamp switch(Dimmer)

Lighting switch: High beam
position

ON

Other than above

OFF

343

Turn switch left

Turn-signal lamp switch: LH
position

ON

Other than above

OFF

344

Turn switch right

Turn-signal lamp switch: RH
position

ON

Other than above

OFF

345

Fog lamp ON

Fog lamp switch: During ON
operation

ON

Other than above

OFF

346

Fog lamp OFF

Fog lamp switch: During OFF
operation

ON

Other than above

OFF

Item No. M.U.T.-III display

Check condition

Normal condition

ETACS

CHASSIS ELECTRICAL

54A-547

347

Switch type

Left hand drive

LHD

Right hand drive

RHD

348

Head lamp switch(auto)

Lighting switch: AUTO position

ON

Other than above

OFF

349

Head lamp cleaner

Lighting switch: Headlamp
washer switch operation

ON

Other than above

OFF

350

Head lamp switch(flasher)

Lighting switch: During dimmer
switch operation

ON

Other than above

OFF

351

Column ECU sleep

Ignition switch: Other than ON
and START position

OK

Ignition switch: ON or START
position

NG

352

Front wiper(INT)

Wiper switch: INT position

ON

Other than above

OFF

353

Front wiper(LO)

Wiper switch: LO position

ON

Other than above

OFF

354

Front wiper(HI)

Wiper switch: HI position

ON

Other than above

OFF

355

Front wiper(washer)

Wiper switch: During washer
operation

ON

Other than above

OFF

356

Rear wiper

Wiper switch: rear wiper
position

ON

Other than above

OFF

357

Rear wiper(washer)

Wiper switch: rear washer
position

ON

Other than above

OFF

358

Front wiper(MIST)

Wiper switch: During MIST
operation

ON

Other than above

OFF

359

Front wiper(interval volume)

Variable intermittent wiper
control switch is switched from
(+) to (

−).

Value changes from
0 (+) to 254 (

−).

360

Wiper switch lever fail

When normal

Normal

When abnormality is present

Fail

361

Turn/Lamp switch lever fail

When normal

Normal

When abnormality is present

Fail

400

Indirect lamp switch

Not used

OFF

Item No. M.U.T.-III display

Check condition

Normal condition

ETACS

CHASSIS ELECTRICAL

54A-548

TROUBLE SYMPTOM CHART

M1545001200199

SYMPTOM PROCEDURES

Malfunction of ETACS-ECU power supply circuit

401

Indirect lamp

Not used

−

403

Shift Lock solenoid fail flag

When a problem is present
(short to power supply)

ON

Other than above

OFF

Item No. M.U.T.-III display

Check condition

Normal condition

Trouble symptom

Reference page

Malfunction of ETACS-ECU power supply circuit

ETACS-ECU Power Source Circuit

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 : Grey R : Red P : Pink V : Violet PU : Purple SI : Silver

FUSIBLE
LINK

34

44

FUSIBLE
LINK

36

38

NOTE

EXCEPT 1800-DIESEL

:

1800-DIESEL

:

RELAY BOX

ENGINE
COMPARTMENT

ETACS

CHASSIS ELECTRICAL

54A-549

COMMENTS ON TROUBLE SYMPTOM
If the ETACS-ECU functions do not work at all, the
ETACS-ECU power supply system, earth system, or
ETACS-ECU may have a problem.

PROBABLE CAUSES

• Damaged harness wires and connectors

• Malfunction of the ETACS-ECU

DIAGNOSIS PROCEDURE

STEP 1. Connector check: C-315, C-317 ETACS-
ECU connector

Q: Is the check result normal?

YES :

Go to Step 2.

NO :

Repair the defective connector.

STEP 2. Resistance measurement at the C-315
and C-317 ETACS-ECU connector.
(1) Disconnect the connector, and measure at the

wiring harness side.

(2) Measure the resistance between the C-315

ETACS-ECU connector terminal No. 17 and the
body earth.

OK: Continuity exists (2

Ω or less)

(3) Measure the resistance between the C-317

ETACS-ECU connector terminal No. 15 and the
body earth.

OK: Continuity exists (2

Ω or less)

Q: Is the check result normal?

YES :

Go to Step 4.

NO :

Go to Step 3.

STEP 3. Wiring harness check between the C-315
or C-317 ETACS-ECU connector terminal No. 17
or 15 and the body earth

• 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

use Troubleshooting/inspection Service
Points

− How to Cope with Intermittent

Malfunction ).

NO :

Repair the wiring harness.

STEP 4. Connector check: C-307 and C-309
ETACS-ECU connector

Q: Is the check result normal?

YES :

Go to Step 5.

NO :

Repair the defective connector.

STEP 5. Voltage measurement at the C-307
ETACS-ECU connector.
(1) Disconnect the connector, and measure at the

wiring harness side.

(2) Measure the voltage between the C-307 ETACS-

ECU connector terminal No. 2 and the body
earth.

OK: System voltage

Q: Is the check result normal?

YES :

Go to Step 7.

NO :

Go to Step 6.

STEP 6. Wiring harness check between the C-307
ETACS-ECU connector terminal No. 2 and the
fusible link (36) <except 1800-Diesel> or (38)
<1800-Diesel>.

• Check the power supply line for open circuit.

Q: Is the check result normal?

YES :

The trouble can be an intermittent

malfunction (Refer to GROUP 00

− How to

use Troubleshooting/inspection Service
Points

− How to Cope with Intermittent

Malfunction ).

NO :

Repair the wiring harness.

STEP 7. Voltage measurement at the C-309
ETACS-ECU connector.
(1) Disconnect the connector, and measure at the

wiring harness side.

(2) Measure the voltage between the C-309 ETACS-

AC701240

AT

C-309 (B)

C-307 (B)

ETACS-ECU

Connectors: C-307, C-309, C-315, C-317
<LHD>

C-317

C-315

AC701241

AY

Connectors: C-307, C-309, C-315, C-317
<RHD>

C-309 (B)

C-307 (B)

ETACS-ECU

C-317

C-315