Mitsubishi Lancer (4A9 engine). Manual - part 245

GENERAL INFORMATION

CONTROLLER AREA NETWORK (CAN)

54C-4

NOTE: 

.

•

Dominant ECU: ETACS-ECU and engine 
ECU

•

Non-dominant ECU: ECU and sensor on 
CAN-C network, excluding ETACS-ECU and 
engine ECU

• To the CAN bus line, ECU, sensor, and diagnosis 

connector are connected as follows for each net-
work.
CAN-B

• WCM <vehicles without KOS> or KOS-ECU 

<vehicles with KOS>

• SRS-ECU

• Heater control unit <vehicles without A/C>

• A/C-ECU <vehicles with A/C>

• Radio and CD player <vehicles with Radio 

and CD player> or CAN box unit <vehicles 
with MMCS (vehicles for Russia)>

• Combination meter

CAN-C

• Headlamp automatic levelling-ECU <vehicles 

with AFS>

• Steering wheel sensor <vehicles with ASC or 

AFS>

• AS&G-ECU <vehicles with automatic stop & 

go (AS&G) system>

• ABS-ECU <vehicles without ASC> or ASC-

ECU <vehicles with ASC>

• A/T-ECU <A/T> or CVT-ECU <CVT>

• Electric power steering-ECU <vehicles with 

Electric power steering>

• Engine-ECU

• Corner sensor/back sensor-ECU <vehicles 

with reversing sensor system>

Diagnosis CAN-C

• Diagnosis connector

SPECIAL TOOLS

CONTROLLER AREA NETWORK (CAN)

54C-5

SPECIAL TOOLS

M1548304200972

SPECIAL TOOLS

CONTROLLER AREA NETWORK (CAN)

54C-6

Tool

Number

Name

Use

MB991910

MB991826

MB991955

MB991911

MB991824

MB991827

MB991825

a

b

c

d

e

f

DO NOT USE

MB991955

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

M.U.T.-III sub-
assembly

a. Vehicle 

Communicati
on Interface 
(V.C.I.)

b. M.U.T.-III 

USB cable

c. M.U.T.-III 

main harness 
A (Vehicles 
with CAN 
communicatio
n system)

d. M.U.T.-III 

main harness 
B (Vehicles 
without CAN 
communicatio
n system)

e. M.U.T.-III 

measure 
adapter

f. M.U.T.-III 

trigger 
harness

CAUTION

For vehicles with CAN 
communication, use M.U.T.-III 
main harness A to send 
simulated vehicle speed. If you 
connect M.U.T.-III main harness B 
instead, the CAN communication 
does not function correctly.
CAN bus diagnostics

MB991223

a

d

c

b

DO NOT USE

BA

MB991223

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

Harness set

a. Check 

harness

b. LED harness
c. LED harness 

adapter

d. Probe

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

TEST EQUIPMENT

CONTROLLER AREA NETWORK (CAN)

54C-7

TEST EQUIPMENT

M1548304300333

Test equipment

Name

Use

AC000019

Digital multimeter

Checking CAN bus circuit (for resistance and voltage 
measurements)

MB992006

Extra fine probe

Continuity check and voltage 
measurement at harness wire or 
connector

MB992110

MB992110

Power plant ECU 
check harness

Checking continuity and measuring 
voltage at engine-ECU <Petrol> 
harness-side connector

MB992044

MB992044

Power plant ECU 
check harness

Checking continuity and measuring 
voltage at engine-ECU <Diesel> 
harness-side connector

B991974

MB991974

ABS check 
harness

Checking continuity and measuring 
voltage at ABS-ECU harness-side 
connector

MB991997

MB991997

ASC check 
harness

Checking continuity and measuring 
voltage at ASC-ECU harness-side 
connector

Tool

Number

Name

Use