Mitsubishi Lancer (4A9 engine). Manual — part 89

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-18

Tool

Number

Name

Use

MB990784

Ornament
remover

Steering column cover removal

MB990784

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-19

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

Measurement
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.
Diagnosis code, Data list and
Actuator test check

MB991223

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

Harness set

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

adapter

d. Probe

Making voltage and resistance
measurements during
troubleshooting

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

Tool

Number

Name

Use

MB991910

MB991826

MB991955

MB991911

MB991824

MB991827

MB991825

a

b

c

d

e

f

DO NOT USE

MB991223

a

d

c

b

DO NOT USE

BA

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-20

TROUBLESHOOTING

STANDARD FLOW OF DIAGNOSTIC
TROUBLE SHOOTING

M1541201400140

Refer to Group 00

− Contents of troubleshooting .

TROUBLE SYMPTOM CHART

M1541201100354

CAUTION

During diagnosis, a diagnosis code associated with other system may be set when the ignition switch
is turned on with connector(s) disconnected. On completion, confirm all systems for diagnosis
code(s). If diagnosis code(s) are set, erase them all.

MB992006

Extra fine probe

Continuity check and voltage
measurement at harness wire or
connector

Tool

Number

Name

Use

MB992006

Trouble symptom

Inspection
procedure
No.

Reference page

The ignition key cylinder illumination lamp does not illuminate/
extinguish normally. <vehicles with WCM>

1

Malfunction of the ignition switch power supply system

2

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-21

SYMPTOM PROCEDURES

Inspection Procedure 1: Ignition key cylinder illumination lamp does not illuminate/extinguish
normally. <vehicles with WCM>

CAUTION

Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.

Ignition Key Cylinder Illumination Lamp Circuit

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

KEY
REMINDER
SWITCH
WHEN
REMOVING
KEY: ON

IGNITION KEY
CYLINDER
ILLUMINATION
LAMP

<VEHICLES
WITHOUT KOS>

ETACS-ECU

AC612708

Connector: C-213 <LHD>

AU

AC612716 AL

Connector: C-213 <RHD>