Mitsubishi Lancer (4A9 engine). Manual - part 155

COLUMN SWITCH

CHASSIS ELECTRICAL

54A-282

TROUBLESHOOTING

STANDARD FLOW OF DIAGNOSTIC 
TROUBLESHOOTING

M1543101200145

Refer to GROUP 00 

− Contents of troubleshooting .

DIAGNOSIS FUNCTION

M1543101300120

HOW TO READ DIAGNOSIS CODE

GROUP 00 

− Diagnosis function .

HOW TO ERASE DIAGNOSIS CODE

GROUP 00 

− Diagnosis function .

DIAGNOSIS CODE TABLE

M1543100300291

NOTE: The ETACS-ECU sets a diagnosis code.

DIAGNOSIS CODE PROCEDURES

Code No.B2350 Lighting switch malfunction

 

Code No.B2351 Wiper/washer switch malfunction

TROUBLE JUDGMENT
The ETACS-ECU receives the signals related to 
lighting and wiper/washer from the column switch. If 
the fail information data is included in the signal from 
column switch, the diagnosis code No. B2350 (light-
ing switch) or B2351 (wiper/washer switch) is stored.

COMMENTS ON TROUBLE SYMPTOM
The lighting switch, wiper/washer switch or the 
ETACS-ECU may have a problem.

PROBABLE CAUSES

• Malfunction of lighting switch (with built-in col-

umn-ECU)

• Malfunction of wiper/washer switch

• Malfunction of the ETACS-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check whether the diagnosis code is 
reset.
Check again if the diagnosis code is set to the 
ETACS-ECU.
(1) Erase the diagnosis code.
(2) Turn the ignition switch from "LOCK" (OFF) 

position to "ON" position.

(3) Check if the diagnosis code No. B2350 or B2351 

is set.

Q: Is the diagnosis code set?

Code No. B2351 is set. : 

Go to Step 2.

Code No. B2350 is set. : 

Go to Step 3.

No diagnosis code is set. : 

The trouble can be an 

intermittent malfunction (GROUP 00 

− How 

to Cope with Intermittent Malfunction ).

MB992006

Extra fine probe

Continuity check and voltage 
measurement at harness wire or 
connector

Tool

Number

Name

Use

MB992006

Diagnosis code No.

Diagnostic item

Reference page

B2350

Lighting switch malfunction

B2351

Wiper/washer switch malfunction

COLUMN SWITCH

CHASSIS ELECTRICAL

54A-283

STEP 2. Check whether the diagnosis code is 
reset.
Check again if the diagnosis code is set to the 
ETACS-ECU.
(1) Replace the wiper/washer switch.
(2) Erase the diagnosis code.
(3) Turn the ignition switch from "LOCK" (OFF) 

position to "ON" position.

(4) Check if diagnosis code is set.

Q: Is the diagnosis code set?

YES : 

Go to Step 3.

NO : 

The diagnosis is complete.

STEP 3. Check whether the diagnosis code is 
reset.
Check again if the diagnosis code is set to the 
ETACS-ECU.
(1) Replace the lighting switch (with built-in column-

ECU).

(2) Erase the diagnosis code.
(3) Turn the ignition switch from "LOCK" (OFF) 

position to "ON" position.

(4) Check if diagnosis code is set.

Q: Is the diagnosis code set?

YES : 

Replace the ETACS-ECU.

NO : 

The diagnosis is complete.

REMOVAL AND INSTALLATION

M1543100700727

LIGHTING SWITCH AND WIPER/WASHER 
SWITCH

AC802153

3

5

4

2

1

AD

2.5 ± 0.5 N·m

Removal steps 

1.

Ignition key cover (Refer to 
GROUP 54A 

− Ignition switch ).

2.

Steering column cover lower, 
Steering column cover upper (Refer 
to GROUP 54A 

− Ignition switch ).

3.

Steering column upper cover (Refer 
to GROUP 54A 

− Ignition switch ).

4.

Wiper/washer switch

5.

Lighting switch (with built-in 
column-ECU)

Removal steps (Continued)

COLUMN SWITCH

CHASSIS ELECTRICAL

54A-284

COLUMN SWITCH BODY

CAUTION

• To remove the driver airbag module, refer to GROUP 52B − Service Precautions  and Driver’s Air 

Bag Module and Clock Spring .

• After the installation, perform a calibration for the ASC-ECU to learn the steering wheel sensor 

neutral point. (Refer to GROUP 35C, On-vehicle Service 

− Steering Wheel Sensor Calibration ). 

<Vehicles with ASC or AFS>

Pre-removal operation
• Check of steering wheel straight-ahead position
• Removal of steering wheel assembly (Refer to GROUP 

52B - Driver’s Air Bag Module and Clock Spring .)

• Removal of ignition key cover, steering column lower 

cover, steering column upper cover (Refer to GROUP 54A 

− Ignition switch )

• Removal of Clock spring (Refer to GROUP 52B - Driver’s 

Air Bag Module and Clock Spring ).

Post-installation operation
• Installation of Clock spring (Refer to GROUP 52B - 

Driver’s Air Bag Module and Clock Spring ).

• Installation of steering column lower cover, steering col-

umn upper cover (Refer to GROUP 54A 

− Ignition switch )

• Installation of steering wheel assembly (Refer to GROUP 

52B - Driver’s Air Bag Module and Clock Spring .)

• Check of steering wheel straight-ahead position

AC605523AB

1

2

2.5 ± 0.5 N·m

Wiper/washer switch

Lighting switch

Removal Steps 

1.

Column switch body

2.

Steering wheel sensor (Refer to 
GROUP 35C - Steering wheel 
sensor ). <Vehicles with ASC or 
AFS>

COLUMN SWITCH

CHASSIS ELECTRICAL

54A-285

INSPECTION

WIPER/WASHER SWITCH CONTINUITY CHECK

M1543101700225

<VEHICLES WITHOUT LIGHTING CON-
TROL SENSOR>

<VEHICLES WITH LIGHTING CONTROL 
SENSOR>

WIPER/WASHER SWITCH CONTINUITY CHECK

M1543101700214

<VEHICLES WITHOUT LIGHTING CON-
TROL SENSOR>

Switch position

Tester 
connectio
n 

Specified 
condition

OFF

−

Open circuit

Windshield 
intermittent wiper 
interval adjusting 
knob

6 

− 3

Operating the 
adjusting knob 
changes the 
resistance. 

Windshield washer 
switch

6 

− 7

Continuity exists 
(2 

Ω or less)

Windshield 
wiper switch

Hi

6 

− 8

Continuity exists 
(2 

Ω or less)

Lo

6 

− 9

Continuity exists 
(2 

Ω or less)

Int

6 

− 10

Continuity exists 
(2 

Ω or less)

Mist

6 

− 11

Continuity exists 
(2 

Ω or less)

AC609144

1

6

8

11

10

9

7

5

4

3

2

AE

Switch position

Tester 
connectio
n 

Specified 
condition

OFF

−

Open circuit

 Windshield rain 
sensitive wiper 
function adjusting 
knob

6 

− 3

Operating the 
adjusting knob 
changes the 
resistance. 

Windshield washer 
switch

6 

− 7

Continuity exists 
(2 

Ω or less)

Windshield 
wiper switch

Hi

6 

− 8

Continuity exists 
(2 

Ω or less)

Lo

6 

− 9

Continuity exists 
(2 

Ω or less)

Auto 6 

− 10

Continuity exists 
(2 

Ω or less)

Mist

6 

− 11

Continuity exists 
(2 

Ω or less)

AC609144

AC612670AG

AC605524

1

6

8

11

10

9

7

5

4

3

2

AC