Mitsubishi Lancer Evolution IX. Manual - part 268

MB991223

A

D

C

B

AZ

DO NOT USE

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-9

TROUBLESHOOTING

IGNITION KEY REMINDER BUZZER AND 
DOOR LOCK PREVENTION FUNCTION 
TROUBLESHOOTING

M1543000701187

The ignition key reminder buzzers are controlled by 
the Smart Wiring System (SWS). For troubleshoot-
ing, refer to respective Groups below.

• Not using SWS monitor: GROUP 54B, Trouble-

shooting 

P.54B-33

.

• Using SWS monitor: GROUP 54C, Troubleshoot-

ing 

P.54C-20

.

IMMOBILIZER SYSTEM 
TROUBLESHOOTING

DIAGNOSIS CODE CHART

M1543007100514

CAUTION

During diagnosis, a diagnosis code associated 
with other system may be set when the ignition 
switch is turned on with connector(s) discon-
nected. On completion, confirm all systems for 
diagnosis code code(s). If diagnosis code 
code(s) are set, erase them all.
Use the following chart to develop proper diagnostic 
strategy.

Diagnosis code No.

Diagnosis item

Reference page

11

Transponder communication system or radio interference 
of encrypted code

P.54A-10

.

12

Encrypted codes are not the same or are not registered

P.54A-11

.

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: Connect pin contact 

pressure inspection

B: Power circuit inspection
C: Power circuit inspection
D: Commercial tester 

connection

MB992006

MB992006

Extra fine probe

Continuity check and voltage 
measurement at harness wire 
or connector

Tool

Number

Name

Use

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-10

DIAGNOSTIC TROUBLE CODE 
PROCEDURES

Code No.11: Transponder Communication System or Radio Interference of Encrypted Code

AC504325

Ignition Key Ring and Immobilizer-ECU Circuit

HIGH-FREQUENCY
CIRCUIT

IGNITION KEY

TRANSPONDER

IGNITION KEY
RING ANTENNA

ENCRYPTED
CODE

AB

IMMOBILIZER-ECU

DIAGNOSIS CODE SET CONDITION

• Diagnosis code No.11 may be set if other ignition 

keys are in the vicinity of the vehicle as it is being 
started.

• The transponder’s encrypted code is not sent to 

the immobilizer-ECU immediately after the igni-
tion switch is turned to "ON" position.

NOTE: Diagnosis code No.11 is always set together 
with MPI system diagnosis code No.P0513.

TROUBLESHOOTING HINTS

• Radio interference of the encrypted code.

• Malfunction of the transponder.

• Malfunction of the immobilizer-ECU.

DIAGNOSIS PROCEDURE 

STEP 1. Check for presence of other key near the 
key in the ignition.

Q: Is there any other key near the key in the ignition?

YES : 

Move the other key well away from key 

being used. Retest the system.

NO : 

Go to Step 2.

STEP 2. Check that the engine start using the 
spare ignition key which encrypted code has 
been registered.

Q: Does the engine start using the spare ignition key 

for which the encrypted code has been registered?
YES : 

Replace the ignition key that does not work. 

Then register the password (secret code) 
and encrypted code 

P.54A-22

. Retest the 

system.

NO : 

Go to Step 3.

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-11

STEP 3. Check whether the diagnosis code is 
reset.

Q: Which diagnosis code is set, code No.11 or 12 the 

encrypted code has been registered?
Code No.12 is set : 

Refer to 

P.54A-11

.

Code No.11 is set : 

Go to Step 4.

STEP 4. Connector check: Immobilizer-ECU 
connector C-207-1.

AC310479

Connector: C-207-1 <L.H. drive vehicles>

Harness side

AH

AC310481

Connector: C-207-1 <R.H. drive vehicles>

Harness side

AH

Code No.12: Encrypted Codes are not the same or are not Registered

DIAGNOSIS CODE SET CONDITION

The encrypted code sent by the transponder is not 
the same encrypted code which is registered in the 
immobilizer-ECU.
NOTE: Diagnosis code No.12 is always output 
together with MPI system diagnosis code No.P0513.

TROUBLESHOOTING HINTS

• The encrypted code in the ignition key has not 

been properly registered.

• Malfunction of immobilizer-ECU.

DIAGNOSIS PROCEDURE

Was the encrypted code registered?

YES : 

Replace the immobilizer-ECU and then 

re-register the encrypted code (Refer to 

P.54A-22

).

NO : 

Register the encrypted code (Refer to 

P.54A-22

).

SYMPTOM CHART

M1543007201279

Symptom

Inspection 
procedure No.

Reference page

Communication with M.U.T.-II/III is impossible.

1

P.54A-12

The ignition key cannot be registered.

2

P.54A-20

Engine does not start (cranking but no initial combustion).

3

P.54A-20

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-12

SYMPTOM PROCEDURES

INSPECTION PROCEDURE 1: Communication with M.U.T.-II/III is Impossible.

AC504327

Immobilizer-ECU Power Source, Earth and Engine-ECU Communication Line Circuit

ENGINE
CONTROL
RELAY

ENGINE-ECU

L.H. drive
vehicles

R.H. drive
vehicles

IMMOBILIZER-
ECU

POWER
SOURCE

L.H. drive
vehicles

R.H. drive
vehicles

Wire colour code
B : Black     LG : Light green     G : Green     L : Blue
W : White     Y : Yellow     SB : Sky blue     BR : Brown
O : Orange     GR : Gray     R : Red     P : Pink     V : Violet

AB