Mitsubishi Evolution X. Manual - part 1040

STEERING WHEEL AUDIO REMOTE CONTROL SWITCH

TSB Revision

CHASSIS ELECTRICAL

54A-521

DIAGNOSIS

STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING

M1544004800584

Refer to GROUP 00, Troubleshooting contents 

P.00-7

.

TROUBLE SYMPTOM CHART

M1544004901324

MB991223

a. MB991219
b. MB991220
c. MB991221
d. MB991222

Harness set

a. Check harness
b. LED harness
c. LED harness 

adapter

d. Probe

General service tool 
(jumper)

Continuity check and voltage 
measurement at harness wire or 
connector

a. For checking connector pin 

contact pressure

b. For checking power supply 

circuit

c. For checking power supply 

circuit

d. For connecting a locally 

sourced tester

MB992006
Extra fine probe

−

Continuity check and voltage 
measurement at harness wire or 
connector

Tool

Tool number and 
name

Supersession

Application

MB991223

a

d

c

b

DO NOT USE

BA

MB992006

Inspection 
Procedure No.

Trouble symptom

Reference 
page

1

Steering wheel audio remote control 
switch does not function.

<vehicles with radio and CD player>

P.54A-522

2

<vehicles with MMCS>

P.54A-527

3

Steering wheel audio remote control switch illumination does not come on.

P.54A-531

STEERING WHEEL AUDIO REMOTE CONTROL SWITCH

TSB Revision

CHASSIS ELECTRICAL

54A-522

SYMPTOM PROCEDURES

Inspection Procedure 1: Steering wheel audio remote control switch does not Function. <Vehicles 
with radio and CD player>

CAUTION

Before replacing the ECU, ensure that the power 
supply circuit, the ground circuit and the com-
munication circuit are normal.

RADIO AND CD PLAYER

CLOCK 
SPRING

STEERING WHEEL AUDIO 
REMOTE CONTROL
SWITCH

Steering Wheel Audio Remote Control Switch Circuit

STEERING WHEEL AUDIO REMOTE CONTROL SWITCH

TSB Revision

CHASSIS ELECTRICAL

54A-523

.

TECHNICAL DESCRIPTION (COMMENT)

The power supply circuit to the steering wheel audio 
remote control switch, the steering wheel audio 
remote control switch, the radio and CD player, or 
the clock spring may be defective.

.

TROUBLESHOOTING HINTS

• The steering wheel audio remote control switch 

may be defective.

• The radio and CD player may be defective.

• The clock spring may be defective.

• Damaged harness wires and connectors

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB992006: Extra Fine Probe

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: M.U.T.-III USB Cable

• MB991910: M.U.T.-III Main Harness A

AC708951BU

C-32

C-110

Connectors: C-32, C-107, C-110

C-107

AC708953AF

Connectors: C-202, C-205, C-213

C-205

C-202

C-213 (R)

STEERING WHEEL AUDIO REMOTE CONTROL SWITCH

TSB Revision

CHASSIS ELECTRICAL

54A-524

STEP 1. Using scan tool MB991958, check data list. 
Check whether the service data below are normal.
(1) Turn the ignition switch to "ON" position.
(2) Operate each switch of the steering remote control. Check 

whether the normal conditions listed below are displayed. 
(Refer to 

P.54A-363

.)

OK: Normal condition is displayed.

Q: Is the check result normal?

YES : Replace the radio and CD player.
NO :  Go to Step 2.

STEP 2. Check the steering wheel audio remote control 
switch.
Remove the steering wheel audio remote control switch. Then 
check continuity between the switch terminals.

Q: Is the steering wheel audio remote control switch in 

good condition?
YES : Go to Step 3.
NO :  Replace the steering wheel audio remote control 

switch.

Item No.

Item name

Normal 
condition

Item 1

RADIO remoto SW (SEEK-)

ON

Item 2

RADIO remoto SW (SEEK+)

ON

Item 3

RADIO remoto SW (MODE)

ON

Item 4

RADIO remoto SW (VOL-)

ON

Item 5

RADIO remoto SW (VOL+)

ON

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

Switch Position

Tester 
Connection

Measurement Value

No push

2 

− 4

Approximately 71 k

Ω

Mode

Approximately 270 

Ω

CH up

Approximately 740 

Ω

CH down

Approximately 1.3 k

Ω

VOL up

Approximately 2.1 k

Ω

VOL down

Approximately 3.1 k

Ω