Mazda X-5. Manual — part 109

SECURITY AND LOCKS [KEYLESS ENTRY SYSTEM]

09–14B–7

09–14B

Immobilizer System Release Operation

The ignition switch is turned from the LOCK (ACC) to the
ON (START) position. (Security light illuminates.)

(1) The instrument cluster sends data A* to the key
(transponder) via the coil.

(3) The instrument cluster verifies consistency between the
received key ID number and the previously registered key ID numbers.

(4) The instrument cluster makes a calculation using received
data B and compares it with sent data A.

(5) The instrument cluster requests data for verification
from the PCM.

(6) The PCM sends data C* to the instrument cluster.

(7) The instrument cluster calculates data D from received
data C and sends it to the PCM.

(8) The PCM makes a calculation using received data D
and compares it with sent data C.

Engine starting is permitted.
(The security light goes out after approx. 3 s.)

Engine starting is not permitted.
(After detecting the error (such as non-verification or
malfunction), the security light illuminates or flashes
continuously for approx. 1 min, and then a DTC is
repeatedly displayed 10 times.)

(2) The key (transponder) calculates data B from received
data A and sends its specific key ID number and data B to
the instrument cluster via the coil.

*: Data A and C are different random values each time.

UNSATISFACTORY RESULT

UNSATISFACTORY RESULT

UNSATISFACTORY RESULT

SATISFACTORY RESULT

SATISFACTORY RESULT

SATISFACTORY RESULT

(5), (7)

(6)

(2)

(1)

(3), (4)

(8)

(7)

KEY

(TRANSPONDER)

COIL ANTENNA

PCM

INSTRUMENT CLUSTER

B3E0914T005

SECURITY AND LOCKS [KEYLESS ENTRY SYSTEM]

09–14B–8

Immobilizer System Setting

• The immobilizer system can be set so that only the WDS or equivalent must be used to perform system

procedures. When using the WDS or equivalent, first security access must be requested. Obtain security
access permission according the WDS or equivalent screen and then perform system procedures.

• When immobilizer system component parts (key, Instrument cluster, PCM, and coil antenna) are replaced, the

system must be reset as described below. For setting method details, see Mazda3 Workshop Manual.

End Of Sie

KEY CONSTRUCTION

E5U091467000N13

• Keys for use with the immobilizer system have an

electronic communication device (transponder)
built into the key head that retains specific
electronic codes (key ID number).

End Of Sie

WDS or equivalent setting items

Contents

Programming an additional ignition key

Allows key ID number registration.

Ignition key ID number clearing

Clearing and registration of key ID numbers.

Parameter reset

Initialization of either of the following:

• PCM

• Instrument cluster

Customer spare key programming enable

“Method for adding other keys using two keys that can start the
engine” is enabled.

Note

• This is the default setting on new vehicles.

Customer spare key programming disable

“Method for adding other keys using two keys that can start the
engine” is disabled.

Note

• When only the WDS or equivalent must be used to register

key ID numbers, making a forged key by using two keys that
can start the engine is prevented. This function is for use by
rental car or other companies with vehicle fleets.

Component part

Setting

Key addition

Key ID number of added key must be registered. Key ID number registration is
performed according to the following methods:

• Method for registering other keys using two keys that can start the engine

• Method using the WDS or equivalent

Key clearing

The registered key ID number can only be cleared using the WDS or equivalent. When
clearing a key ID number using the WDS or equivalent, all key ID numbers are cleared.

PCM replacement

• Parameter reset must be performed.

• The key ID numbers for all keys that were being used must be registered in the

WDS or equivalent. Two or more keys must be registered.

Instrument cluster replacement

• Parameter reset must be performed.

• The key ID numbers for all keys that were being used must be registered in the

WDS or equivalent. Two or more keys must be registered.

Coil antenna replacement

Resetting of the immobilizer system does not need to be performed.

TRANSPONDER

C3U0914S009

SECURITY AND LOCKS [KEYLESS ENTRY SYSTEM]

09–14B–9

09–14B

COIL ANTENNA CONSTRUCTION

E5U091467000N14

• Installed on the steering lock.

• Forms a magnetic field near the steering lock and

receives the key signal.

• The received key signal is demodulated and input

to the instrument cluster.

End Of Sie

SECURITY LIGHT CONSTRUCTION/OPERATION

E5U091467000N15

Construction

• Allows visual confirmation of immobilizer system operation.

• If any malfunction is detected in the immobilizer system, the malfunction location can be verified by the security

light flashing pattern.

Note

• If there is security light system malfunction, DTCs may not be properly displayed. Always use the WDS or

equivalent to verify DTCs.

Operation

• When the immobilizer system is operating, the

security lights flash repeatedly 0.1 s every 2 s.

• When the immobilizer system is released

normally, the security light illuminates for 3 s and
then goes off when the ignition switch is turned to
the ON position.

• If the immobilizer system is not released normally

(malfunction detected by the malfunction
diagnosis function), the security light displays a
DTC. If this occurs, the security lights flash or
illuminates for 1 min and then displays the DTC
when the ignition switch is turned to the ON
position.

— DTC 16 and lower: Flashes

— DTC 21 and higher: Illuminated

Note

• The security lights flash to display the DTC

10 times.

• If multiple DTCs that can be confirmed with

the security light are detected, only the DTC
with the lowest number of those detected will
be displayed by the security light.

End Of Sie

COIL ANTENNA

STEERING LOCK

C3U0914S010

ILLUMINATED

GOES OUT

APPROX. 2 S

APPROX. 0.1 S

C3U0914S011

ILLUMINATED

GOES OUT

APPROX. 3 S

C3U0914S012

EXAMPLES: DTC 12 DETECTED BY
THE MALFUNCTION DIAGNOSIS FUNCTION

ILLUMINATED

GOES OUT

APPROX. 1 MIN

DTC 12

C3U0914S013

SECURITY AND LOCKS [KEYLESS ENTRY SYSTEM]

09–14B–10

ON-BOARD DIAGNOSTIC SYSTEM OUTLINE [IMMOBILIZER SYSTEM]

E5U091467000N16

• The immobilizer system is provided with a malfunction diagnosis function.

• Malfunction diagnosis of the immobilizer system occurs automatically when the ignition switch is turned from

the LOCK (ACC) to the ON (START) position.

• If the results of the malfunction diagnosis show a malfunction in the immobilizer system, the security light

displays a DTC. At the same time, DTCs are stored in the PCM and instrument cluster. The stored DTCs can
be verified using the WDS or equivalent.

Caution

• Always use the WDS or equivalent to verify DTCs even if the security light display a DTC. If the

security light itself has a malfunction, it is possible that a DTC may not be properly displayed.
There are certain DTCs which can only be verified using the WDS or equivalent, not the security
light.

• DTCs for the immobilizer system that are stored in the instrument cluster and PCM are cleared

when the ignition switch is turned from the ON to the LOCK (ACC) position.

Note

• If two or more malfunctions are detected as a result of malfunction diagnosis, only the DTC with the lowest

number of those detected will be displayed by the security light. However, multiple DTCs are stored at the
same time.

• If two or more immobilizer system DTCs are verified, first repair the part indicated by the security light

displayed DTC. After completely repairing one location, turn the ignition switch from the LOCK to the ON
position and perform immobilizer system malfunction diagnosis.

DTC Table

Note

• In the approx. 1 min after detecting a malfunction and before displaying the DTC, the security light will

illuminate or flash the following patterns:

Security light flashing pattern

(Before displaying DTC)

DTC

11, 12, 13, 14, 15, 16

21, 22, 23

DTC

Detection condition

Security light flashing pattern

WDS or equivalent

display

*

Instrument

cluster

PCM

11

B1681

P1260

No detected communication with the coil

12

B2103

P1260

• Coil antenna malfunction

• The PCM determined a malfunction in the coil

antenna even though it is normal.

13

B1600

P1260

The key ID number data cannot be read.

B2431

P1260

Key ID number registration error

ILLUMINATED

GOES OUT

ILLUMINATED

GOES OUT