Mitsubishi Lancer Evolution X. Manual - part 204

DIAGNOSIS

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ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-281

.

RESISTANCE AND CONTINUITY BETWEEN 
HARNESS-SIDE CONNECTOR TERMINALS

Required Special Tool:
MB991997: ASC Check Harness
1. Operate the lock lever as shown in the figure to disconnect 

the ASC-ECU wiring harness connector.

Terminal 
No.

Check item

Check conditions

Normal 
conditions

1

Motor power supply

Ignition switch: ON (OFF)

Battery positive 
voltage

2

ASC-ECU power supply

Ignition switch: ON (OFF)

Battery positive 
voltage

22

G and yaw rate sensor power 
supply

Ignition switch: ON

Battery positive 
voltage

32

Solenoid valve power supply

Ignition switch: ON (OFF)

Battery positive 
voltage

34

Wheel speed sensor (FR) power 
supply

Ignition switch: ON

Battery positive 
voltage

36

Wheel speed sensor (RL) power 
supply

Ignition switch: ON

Battery positive 
voltage

43

Wheel speed sensor (RR) power 
supply

Ignition switch: ON

Battery positive 
voltage

45

Wheel speed sensor (FL) power 
supply

Ignition switch: ON

Battery positive 
voltage

AC708791

AB

Lock lever

DIAGNOSIS

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-282

2. When performing the continuity check, turn the ignition 

switch to LOCK (OFF) position, connect special tool ASC 
Check Harness (MB991997) as shown in the figure, and 
disconnect the ASC-ECU connector.

3. Check for continuity between terminals shown in the chart 

below.

4. Terminal layout is shown in the figure.

AC400817CO

ASC-ECU

MB991997

A-05 ASC-ECU 
harness connector

Check harness

Terminal No.

Signal

Normal conditions

16 − body ground

Ground

Continuity exists (2 Ω or 

less)

47 − body ground

Ground

Continuity exists (2 Ω or 

less)

SPECIAL TOOLS

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ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-283

SPECIAL TOOLS

M1355005800101

Tool

Tool number and 
name

Supersession

Application

MB991958

a. MB991824
b. MB991827
c. MB991910
d. MB991911
e. MB991914
f. MB991825
g. MB991826

M.U.T.-III sub 
assembly

a. Vehicle 

communication 
interface (V.C.I.)

b. M.U.T.-III USB 

cable

c. M.U.T.-III main 

harness A 
(Vehicles with 
CAN 
communication 
system)

d. M.U.T.-III main 

harness B 
(Vehicles without 
CAN 
communication 
system)

e. M.U.T.-III main 

harness C (for 
Daimler Chrysler 
models only)

f. M.U.T.-III 

measurement 
adapter

g. M.U.T.-III trigger 

harness

MB991824-KIT
NOTE: G: MB991826 
M.U.T.-III Trigger 
Harness is not 
necessary when 
pushing V.C.I. ENTER 
key.

CAUTION

M.U.T.-III main harness A 
(MB991910) should be used. 
M.U.T.-III main harness B and C 
should not be used for this 
vehicle.
ASC check (Diagnostic trouble 
code display, service data display 
and calibration by scan tool )

MB991997

ASC check harness

Voltage inspection at ASC-ECU 
terminals

MB991910

MB991826

MB991958

MB991911

MB991914

MB991824

MB991827

MB991825

DO NOT USE

a

b

c

d

e

f

g

DO NOT USE

MB991997

ON-VEHICLE SERVICE

TSB Revision

ACTIVE STABILITY CONTROL SYSTEM (ASC)

35C-284

ON-VEHICLE SERVICE

HYDRAULIC UNIT CHECK

M1355006100138

Required Special Tools:

• MB991958: 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 (Vehicles with 

CAN communication system)

1. Raise the vehicle using a jack and support the specified 

points with a rigid rack.

CAUTION

Before connecting or disconnecting scan tool, always turn 
the ignition switch to the LOCK (OFF) position.
2. Before setting scan tool, turn the ignition key to the LOCK 

(OFF) position.

3. With the M/T vehicles, check that the shift lever is in the 

neutral position. With the TC-SST vehicle, check that the 
selector lever is in the "N" position. Then, start the engine of 
the vehicle.

MB991223

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

Harness set

a. Test harness
b. LED harness
c. LED harness 

adaptor

d. Probe

General service tools Continuity check and voltage 

measurement at harness wire or 
connector for loose, corroded or 
damaged terminals, or terminals 
pushed back in the connector.

a. Connector pin contact 

pressure inspection

b. Power circuit inspection
c. Power circuit inspection
d. Commercial tester connection

MB992006
Extra fine probe

−

Continuity check and voltage 
measurement at harness wire or 
connector for loose, corroded or 
damaged terminals, or terminals 
pushed back in the connector.

Tool

Tool number and 
name

Supersession

Application

MB991223

a

d

c

b

DO NOT USE

BA

MB992006