Mazda CX 7. Manual — part 332

ON-BOARD DIAGNOSTIC

[IMMOBILIZER SYSTEM (ADVANCED KEYLESS SYSTEM)]

09-02B–13

09-02B

SECURITY LIGHT 22, DTC B2141/P1260[IMMOBILIZER SYSTEM (ADVANCED KEYLESS SYSTEM)]

id0902e3801400

Diagnostic Procedure

End Of Sie

SECURITY LIGHT: 22

Communication error between the keyless control module and the PCM (data transfer error)

DTC: B1241/P1260

DETECTION CONDITION

• Communication error between the keyless control module and the PCM (data transfer error)

POSSIBLE CAUSE

• Malfunction in the wiring harness (CAN line) between the keyless control module and the

PCM

• Keyless control module malfunction

• PCM malfunction

STEP

INSPECTION

ACTION

1

VERIFY DTC

• Are either U1900 or U0073, or both displayed, by

either the keyless control module or the PCM, or
both?

Yes

Perform troubleshooting according to the
corresponding DTC inspection.
(See 09-02D-14 DTC U0073[MULTIPLEX
COMMUNICATION SYSTEM].)

No

Go to the next step.

2

VERIFY DTC

• Using the registered key, turn the ignition switch to

the ON position.

• Is the DTC displayed?

— Security light: 22

— M-MDS: B2141/P1260

Yes

• Replace the PCM and perform the resetting

procedure for the immobilizer system when
replacing the PCM.
(See 09-14-11 IMMOBILIZER SYSTEM
COMPONENT REPLACEMENT/KEY ADDITION
AND CLEARING[ADVANCED KEYLESS
SYSTEM].)

• Go to the next step.

No

DTC troubleshooting completed.

3

EXAMINE KEYLESS CONTROL MODULE

AND PCM

• Is the DTC displayed again?

— Security light: 22

— M-MDS B2141/P1260

Yes

• Replace the keyless control module and perform

the resetting procedure for the immobilizer
system when replacing the keyless control
module.
(See 09-14-30 KEYLESS CONTROL MODULE
REMOVAL/INSTALLATION[ADVANCED
KEYLESS SYSTEM].)
(See 09-14-11 IMMOBILIZER SYSTEM
COMPONENT REPLACEMENT/KEY ADDITION
AND CLEARING[ADVANCED KEYLESS
SYSTEM].)

• Go to the next step.

No

DTC troubleshooting completed.

4

EXAMINE PCM

• Is the DTC displayed again?

— Security light: 22

— M-MDS: B2141/P1260

Yes

• Replace the PCM and perform the resetting

procedure for the immobilizer system when
replacing the PCM.
(See 01-40-6 PCM REMOVAL/
INSTALLATION[L3 WITH TC].)
(See 09-14-11 IMMOBILIZER SYSTEM
COMPONENT REPLACEMENT/KEY ADDITION
AND CLEARING[ADVANCED KEYLESS
SYSTEM].)

No

DTC troubleshooting completed.

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ON-BOARD DIAGNOSTIC

[IMMOBILIZER SYSTEM (ADVANCED KEYLESS SYSTEM)]

09-02B–14

SECURITY LIGHT 23, DTC B2139/P1260[IMMOBILIZER SYSTEM (ADVANCED KEYLESS SYSTEM)]

id0902e3801500

Diagnostic Procedure

End Of Sie

DTC B1342[IMMOBILIZER SYSTEM (ADVANCED KEYLESS SYSTEM)]

id0902e3801600

Diagnostic procedure

End Of Sie

SECURITY LIGHT: 23

ID number data in the PCM and the keyless control module do not match.

DTC: B2139/P1260

DETECTION CONDITION

• ID number data in the keyless control module and the PCM are different.

POSSIBLE CAUSE

• Necessary procedures were not performed using the M-MDS after replacing the PCM.

• Keyless control module malfunction

• PCM malfunction

STEP

INSPECTION

ACTION

1

VERIFY DTC

• Are either U1900 or U0073, or both, displayed, by

either the keyless control module or the PCM, or
both?

Yes

Perform troubleshooting according to the
corresponding DTC inspection.
(See 09-02D-14 DTC U0073[MULTIPLEX
COMMUNICATION SYSTEM].)

No

Go to the next step.

2

EXAMINE KEYLESS CONTROL MODULE AND

PCM

• Perform procedures for when replacing the PCM

only.
(See 09-14-11 IMMOBILIZER SYSTEM
COMPONENT REPLACEMENT/KEY ADDITION
AND CLEARING[ADVANCED KEYLESS
SYSTEM].)

• Using the registered key, turn the ignition switch to

the ON position.

• Is the DTC displayed?

— Security light: 23

— M-MDS: B2139/P1260

Yes

• Replace the keyless control module and perform

the resetting procedure for the immobilizer system
when replacing the keyless control module.
(See 09-14-30 KEYLESS CONTROL MODULE
REMOVAL/INSTALLATION[ADVANCED
KEYLESS SYSTEM].)
(See 09-14-11 IMMOBILIZER SYSTEM
COMPONENT REPLACEMENT/KEY ADDITION
AND CLEARING[ADVANCED KEYLESS
SYSTEM].)

• Go to the next step.

No

DTC troubleshooting completed.

3

VERIFY DTC

• Is the DTC displayed again?

— Security light: 23

— M-MDS: B2139/P1260

Yes

• Replace the PCM and perform the resetting

procedure for the immobilizer system when
replacing the PCM.
(See 01-40-6 PCM REMOVAL/
INSTALLATION[L3 WITH TC].)
(See 09-14-11 IMMOBILIZER SYSTEM
COMPONENT REPLACEMENT/KEY ADDITION
AND CLEARING[ADVANCED KEYLESS
SYSTEM].)

No

DTC troubleshooting completed.

DTC B1342

ECU is faulted

DETECTION
CONDITION

Keyless control module malfunction

POSSIBLE
CAUSE

• Keyless control module malfunction

ACTION

Replace the Keyless control module.
(See 09-14-30 KEYLESS CONTROL MODULE REMOVAL/INSTALLATION[ADVANCED KEYLESS SYSTEM].)

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ON-BOARD DIAGNOSTIC [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]

09-02C–1

09-02C

09-02C ON-BOARD DIAGNOSTIC
[IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]

FOREWORD[IMMOBILIZER SYSTEM

(KEYLESS ENTRY SYSTEM)] . . . . . . . 09-02C–2

DTC INSPECTION[IMMOBILIZER

SYSTEM (KEYLESS
ENTRY SYSTEM)] . . . . . . . . . . . . . . . . 09-02C–2

Security Light . . . . . . . . . . . . . . . . . . . . 09-02C–2
M-MDS . . . . . . . . . . . . . . . . . . . . . . . . . 09-02C–3

DTC TABLE[IMMOBILIZER SYSTEM

(KEYLESS ENTRY SYSTEM)] . . . . . . . 09-02C–3

PID/DATA MONITOR INSPECTION

[IMMOBILIZER SYSTEM (KEYLESS
ENTRY SYSTEM)] . . . . . . . . . . . . . . . . 09-02C–4

PID/DATA MONITOR TABLE

[IMMOBILIZER SYSTEM (KEYLESS
ENTRY SYSTEM)] . . . . . . . . . . . . . . . . 09-02C–4

SECURITY LIGHT 11,

DTC B1681/P1260[IMMOBILIZER
SYSTEM (KEYLESS ENTRY
SYSTEM)] . . . . . . . . . . . . . . . . . . . . . . . 09-02C–5

Diagnostic Procedure. . . . . . . . . . . . . . 09-02C–5

SECURITY LIGHT 12,

DTC B2103/P1260[IMMOBILIZER
SYSTEM (KEYLESS
ENTRY SYSTEM)] . . . . . . . . . . . . . . . . . 09-02C–7

Diagnostic Procedure. . . . . . . . . . . . . . 09-02C–7

SECURITY LIGHT 13,

DTC B1600/P1260
[IMMOBILIZER SYSTEM (KEYLESS
ENTRY SYSTEM)] . . . . . . . . . . . . . . . . 09-02C–7

Diagnostic Procedure. . . . . . . . . . . . . . 09-02C–8

SECURITY LIGHT 13,

DTC B2431/P1260[IMMOBILIZER
SYSTEM (KEYLESS
ENTRY SYSTEM)] . . . . . . . . . . . . . . . . 09-02C–9

Diagnostic Procedure . . . . . . . . . . . . . . 09-02C–9

SECURITY LIGHT 14,

DTC B1602/P1260[IMMOBILIZER
SYSTEM (KEYLESS
ENTRY SYSTEM)] . . . . . . . . . . . . . . . . . 09-02C–10

Diagnostic Procedure . . . . . . . . . . . . . . 09-02C–10

SECURITY LIGHT 15,

DTC B1601/P1260[IMMOBILIZER
SYSTEM (KEYLESS
ENTRY SYSTEM)] . . . . . . . . . . . . . . . . . 09-02C–11

Diagnostic Procedure . . . . . . . . . . . . . . 09-02C–11

SECURITY LIGHT 16, DTC U2510/P1260,

U1147/P1260[IMMOBILIZER SYSTEM
(KEYLESS ENTRY SYSTEM)] . . . . . . . 09-02C–12

Diagnostic Procedure . . . . . . . . . . . . . . 09-02C–12

SECURITY LIGHT 21,

DTC B1213/P1260[IMMOBILIZER
SYSTEM (KEYLESS
ENTRY SYSTEM)] . . . . . . . . . . . . . . . . . 09-02C–12

Diagnostic Procedure . . . . . . . . . . . . . . 09-02C–12

SECURITY LIGHT 22,

DTC B2141/P1260[IMMOBILIZER
SYSTEM (KEYLESS
ENTRY SYSTEM)] . . . . . . . . . . . . . . . . . 09-02C–13

Diagnostic Procedure . . . . . . . . . . . . . . 09-02C–13

SECURITY LIGHT 23,

DTC B2139/P1260[IMMOBILIZER
SYSTEM (KEYLESS
ENTRY SYSTEM)] . . . . . . . . . . . . . . . . . 09-02C–14

Diagnostic Procedure . . . . . . . . . . . . . . 09-02C–14

DTC B1342[IMMOBILIZER SYSTEM

(KEYLESS ENTRY SYSTEM)] . . . . . . . 09-02C–14

End of Toc

WM: IMMOBILIZER SYSTEM

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ON-BOARD DIAGNOSTIC [IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]

09-02C–2

FOREWORD[IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]

id0902e5800100

• Malfunction diagnosis 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, the security light displays a DTC and the PCM

stores the DTC. DTCs stored in the PCM can be verified using the M-MDS.

• DTCs for the immobilizer system that are stored in the PCM are cleared when the ignition switch is turned from

the ON to the LOCK (ACC) position.

• There are certain DTCs which can only be verified using the M-MDS, not the security light.

• The PID/data monitor function can be used to verify the number of keys registered for a single vehicle.

• If DTCs are not displayed even though the engine does not start, perform the following symptom

troubleshooting:

— 01-03-17 NO.3 WILL NOT CRANK[L3 WITH TC]

Caution

• Always use the M-MDS to verify DTCs even if the DTCs are verified by the security light display. If

the security light has a malfunction, it is possible that a DTC may not be properly displayed.

• Always use the M-MDS to verify DTCs because there are certain DTCs which cannot be verified

using the security light.

• If any of the following items are touching or near the key head, signal communication between the

key and vehicle is negatively affected, resulting in the engine not starting. Do not start the engine
if any of the following items are touching or near the key head.

— Any metallic object

— Spare keys or keys for other vehicles equipped with an immobilizer system

— Any electronic device, or any credit or

other cards with magnetic strips

Note

• If multiple DTCs 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. The PCM
stores multiple DTCs 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 repairing
one location, turn the ignition switch from the
LOCK to the ON position and perform an
immobilizer system malfunction diagnosis.

End Of Sie

DTC INSPECTION[IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]

id0902e5800200

Security Light

1. Turn the ignition switch to the ON position.
2. Verify the security light state.

• If there is any malfunction:

— After any malfunction is detected, the security light will function as follows for approx. 1 min.

• DTC 16 and lower: Flashes

• DTC 21 and higher: Illuminated

• If there is no malfunction:

— The security light illuminates for approx. 3 s and goes out.

3. When any malfunction has been detected, read DTCs via flashing patterns displayed after the security light

flashes or is illuminated for approx. 1 min.

• Perform troubleshooting according to the corresponding DTC inspection.

Note

• A verified DTC is flashed 10 times repeatedly by the security light.

• If multiple DTCs are verified, the security light displays only the smallest DTC.

METAL RING LYING ON KEY HEAD

METAL PART OF ANOTHER
KEY TOUCHING KEY HEAD

KEY IS NEAR OR TOUCHING
ANOTHER IMMOBILIZER SYSTEM KEY

EXAMPLES:

acxuuw00002446

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