Mitsubishi Colt Ralliart. Manual — part 466

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-9

DIAGNOSTIC TROUBLE CODE
PROCEDURES

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

AC601474 AB

Ignition Key Ring and Immobilizer-ECU 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 : Gray R : Red P : Pink V : Violet

IMMOBILIZER-
ECU

KEY
REMINDER
SWITCH

IGNITION
KEY RING
ANTENNA

IGNITION KEY

TRANSPONDER

HIGH FREQUENCY
CIRCUIT

DIAGNOSIS CODE SET CONDITIONS

• Diagnosis code 11 may be set if other ignition

keys or the equipment which trigger a radio inter-
ference are in the vicinity of the vehicle as it is
being started.

• The transponder’s encrypted code is not sent to

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

NOTE: Diagnosis code 11 is always set together with
MPI system diagnosis code P0513.

POSSIBLE CAUSES

• Radio interference of the encrypted code

• Malfunction of ignition key

• Malfunction of immobiliser-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 for presence of the equipment
which trigger a radio interference.

Q: Is there any equipment which the customer

attached? For example, a plug-in air freshener and
so on.
YES :

Remove or disconnect the equipment.

Retest the system.

NO :

Go to Step 3.

STEP 3. 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 key
code) and encrypted code

P.54A-23

. Retest

the system.

NO :

Go to Step 4.

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IGNITION SWITCH

CHASSIS ELECTRICAL

54A-10

STEP 4. M.U.T.-III diagnosis code
Check that the immobiliser-ECU sets a diagnosis
code.

Q: Is the diagnosis code set?

YES (diagnosis cede No.11 is set) :

Go to Step 5.

YES (diagnosis cede No.12 is set) :

Code No.12

The ignition key is unregistered or
encrypted codes do not match. Refer to

P.54A-12

.

NO :

The procedure is complete.

STEP 5. Resistance measurement the key
reminder switch connector B-140.

•

AC401044

Connector: B-140

AB

Harness side

B-140(B)

Disconnect the key reminder switch connector

B-140.

•

AC401646 AB

Connector B-140
(Harness side)

Resistance between key reminder switch connector

B-140 terminal No.3 and No.7.

OK: Continuity exists (2

Ω or less)

Q: Is the check result normal?

YES :

Go to Step 6.

NO :

Replace the ignition key ring antenna.
Retest the system.

STEP 6. Connector check: Immobiliser-ECU
connector B-49 and key reminder switch
connector B-140

AC509573

Connector: B-49

Harness side

AB

AC401044

Connector: B-140

AB

Harness side

B-140(B)

Q: Is the check result normal?

YES :

Go to Step 7.

NO :

Repair or replace the defective connector.

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IGNITION SWITCH

CHASSIS ELECTRICAL

54A-11

STEP 7. Check the wiring harness between
immobiliser-ECU connector B-49 (terminal 7 and
8) and key reminder switch connector B-140
(terminal 3 and 7).

AC509573

Connector: B-49

Harness side

AB

AC401044

Connector: B-140

AB

Harness side

B-140(B)

Q: Are the wiring harness between immobiliser-ECU

connector B-49 (terminal 7 and 8) and key reminder
switch connector B-140 (terminal 3 and 7) in good
condition?
YES : .

Replace the immobiliser-ECU and then

register the password (secret key code) and
encrypted code (Refer to

P.54A-23

). Retest

the system.

NO : .

Repair the wiring harness.

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IGNITION SWITCH

CHASSIS ELECTRICAL

54A-12

Code No.12 Encrypted Codes are Not the Same or Not Registered.

DIAGNOSIS CODE SET CONDITIONS

The encrypted code sent by the transponder is not
the same encrypted code which is registered in the
immobiliser-ECU.
NOTE: Diagnosis code 12 is always set together with
MPI system diagnosis code P0513.

POSSIBLE CAUSES

• The encrypted code in the ignition key has not

been properly registered

• The encrypted code in the ignition key is initial

value

• Malfunction of immobiliser-ECU

DIAGNOSIS PROCEDURE

Resister the encrypted code.

Q: Was the encrypted code registered?

YES :

The procedure is complete.

NO :

Replace the immobiliser-ECU and register
the password (secret key code) and on
encrypted code (Refer to

P.54A-23

).

Trouble symptom chart

M1543007201503

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(s). If diagnosis code(s) are set,
erase them all.

Trouble symptom

Inspection
procedure No.

Reference page

MPI system-related diagnostic code No.P0513 is set, and
communication between M.U.T.-III and immobiliser cannot
be established.

1

P.54A-13

The ignition key cannot be registered with the M.U.T.-III.

2

P.54A-16

The engine does not start. (cranking occurs but initial
combustion does not)

3

P.54A-18

Check the power supply and earth circuit to the
immobiliser-ECU.

4

P.54A-19

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