Mazda CX 7. Manual — part 335

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

09-02C–11

09-02C

SECURITY LIGHT 15, DTC B1601/P1260[IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]

id0902e5801100

Diagnostic Procedure

End Of Sie

SECURITY LIGHT: 15

The instrument cluster has detected unregistered key ID number.

DTC: B1601/P1260

DETECTION CONDITION

• The instrument cluster has detected unregistered key ID number.

POSSIBLE CAUSE

• No keys have been registered after replacing the instrument cluster.

• Unregistered key used

• Attempt made to register a ninth key

• Instrument cluster malfunction

STEP

INSPECTION

ACTION

VERIFY NUMBER OF REGISTERED KEYS

• Using the M-MDS, perform the PID/data monitor

inspection and confirm the number of registered
keys.
(See 09-02C-4 PID/DATA MONITOR
TABLE[IMMOBILIZER SYSTEM (KEYLESS
ENTRY SYSTEM)].)

• Are one or more keys registered?

Yes

Go to the next step.

Go to Step 3.

VERIFY NUMBER OF REGISTERED KEYS

• Using the M-MDS, perform the PID/data monitor

inspection and confirm the number of registered
keys.
(See 09-02C-4 PID/DATA MONITOR
TABLE[IMMOBILIZER SYSTEM (KEYLESS
ENTRY SYSTEM)].)

• Are eight keys registered?

Yes

Using the M-MDS, clear the key ID numbers as
necessary, then go to the next step.

Go to the next step.

INSPECT INSTRUMENT CLUSTER

• Using the M-MDS, register the key ID number.

(See 09-14-20 IMMOBILIZER SYSTEM
COMPONENT REPLACEMENT/KEY ADDITION
AND CLEARING[KEYLESS ENTRY SYSTEM].)

Note

• Two or more keys must be registered to

start the engine.

• Using the registered key, turn the ignition switch

to the ON position.

• Is the DTC displayed again?

— Security light: 15

— M-MDS: B1601/P1260

Yes

Replace the instrument cluster and perform the
resetting procedure for the immobilizer system when
replacing the instrument cluster.
(See 09-22-2 INSTRUMENT CLUSTER REMOVAL/
INSTALLATION.)
(See 09-14-20 IMMOBILIZER SYSTEM COMPONENT
REPLACEMENT/KEY ADDITION AND
CLEARING[KEYLESS ENTRY SYSTEM].)

DTC troubleshooting completed.

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

09-02C–12

SECURITY LIGHT 16, DTC U2510/P1260, U1147/P1260[IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]

id0902e5801200

Diagnostic Procedure

End Of Sie

SECURITY LIGHT 21, DTC B1213/P1260[IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]

id0902e5801300

Diagnostic Procedure

SECURITY
LIGHT: 16

DTC: U2510/P1260

Communication error between the instrument cluster and the PCM (no response)

DTC: U1147/P1260

Communication error between the instrument cluster and the PCM (mismatched
conditions)

DETECTION CONDITION

Instrument cluster DTC: U2510

• Communication error between the instrument cluster and the PCM (no response)

Instrument cluster DTC: U1147

• Communication error between the instrument cluster and the PCM (mismatched

conditions)

POSSIBLE CAUSE

• Malfunction in the wiring harness (CAN line) between the instrument cluster and the

PCM

• PCM malfunction

• Instrument cluster malfunction

STEP

INSPECTION

ACTION

VERIFY DTC

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

by either the instrument cluster or the PCM, or
both?

Yes

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

VERIFY DTC

• Using the registered key, turn the ignition switch

to the ON position.

• Is the DTC displayed?

— Security light: 16

— M-MDS: U2510 or U1147/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 09-14-20 IMMOBILIZER SYSTEM COMPONENT
REPLACEMENT/KEY ADDITION AND
CLEARING[KEYLESS ENTRY SYSTEM].)

DTC troubleshooting completed.

SECURITY LIGHT: 21

Only one key ID number is registered.

DTC: B1213/P1260

DETECTION CONDITION

• Only one key is registered.

POSSIBLE CAUSE

• Only one registered key

STEP

INSPECTION

ACTION

VERIFY NUMBER OF REGISTERED KEYS

• Using the M-MDS, perform the PID/data monitor

inspection and confirm the number of registered
keys.
(See 09-02C-4 PID/DATA MONITOR
TABLE[IMMOBILIZER SYSTEM (KEYLESS
ENTRY SYSTEM)].)

• Are two or more keys registered?

Yes

• Using the M-MDS, clear the key ID number and

register a new key if necessary.
(See 09-14-20 IMMOBILIZER SYSTEM
COMPONENT REPLACEMENT/KEY ADDITION
AND CLEARING[KEYLESS ENTRY SYSTEM].)

• Go to the next step.

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

09-02C–13

09-02C

End Of Sie

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

id0902e5801400

Diagnostic Procedure

End Of Sie

VERIFY DTC

• Using the registered key, turn the ignition switch

to the ON position.

• Is the DTC displayed again?

— Security light: 21

— M-MDS: B1213/P1260

Yes

DTC troubleshooting completed.

STEP

INSPECTION

ACTION

SECURITY LIGHT: 22

Communication error between the instrument cluster and the PCM (data transfer error)

DTC: B1241/P1260

DETECTION CONDITION

• Communication error between the instrument cluster and the PCM (data transfer error)

POSSIBLE CAUSE

• Malfunction in the wiring harness (CAN line) between the instrument cluster and the PCM

• Instrument cluster malfunction

• PCM malfunction

STEP

INSPECTION

ACTION

VERIFY DTC

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

either the instrument cluster or the PCM, or both?

Yes

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

Go to the next step.

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 09-14-20 IMMOBILIZER SYSTEM
COMPONENT REPLACEMENT/KEY ADDITION
AND CLEARING[KEYLESS ENTRY SYSTEM].)

• Go to the next step.

DTC troubleshooting completed.

EXAMINE INSTRUMENT CLUSTER AND PCM

• Is the DTC displayed again?

— Security light: 22

— M-MDS: B2141/P1260

Yes

• Replace the instrument cluster and perform the

resetting procedure for the immobilizer system
when replacing the instrument cluster.
(See 09-22-2 INSTRUMENT CLUSTER
REMOVAL/INSTALLATION.)
(See 09-14-20 IMMOBILIZER SYSTEM
COMPONENT REPLACEMENT/KEY ADDITION
AND CLEARING[KEYLESS ENTRY SYSTEM].)

• Go to the next step.

DTC troubleshooting completed.

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 09-14-20 IMMOBILIZER SYSTEM
COMPONENT REPLACEMENT/KEY ADDITION
AND CLEARING[KEYLESS ENTRY SYSTEM].)

DTC troubleshooting completed.

1871-1U-06B(09-02C).fm 13 ページ２００６年３月１５日水曜日午前１１時３９分

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

09-02C–14

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

id0902e5801500

Diagnostic Procedure

End Of Sie

DTC B1342[IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]

id0902e5801600

Diagnostic procedure

End Of Sie

SECURITY LIGHT: 23

ID number data in the PCM and the instrument cluster do not match.

DTC: B2139/P1260

DETECTION CONDITION

• ID number data in the instrument cluster and the PCM are different.

POSSIBLE CAUSE

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

• Instrument cluster malfunction

• PCM malfunction

STEP

INSPECTION

ACTION

VERIFY DTC

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

either the instrument cluster or the PCM, or both?

Yes

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

Go to the next step.

EXAMINE INSTRUMENT CLUSTER AND PCM

• Perform procedures for when replacing the PCM

only.
(See 09-14-20 IMMOBILIZER SYSTEM
COMPONENT REPLACEMENT/KEY ADDITION
AND CLEARING[KEYLESS ENTRY 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 instrument cluster and perform the

• Go to the next step.

DTC troubleshooting completed.

VERIFY DTC

• Is the DTC displayed again?

— Security light: 23

— M-MDS: B2139/P1260

Yes

• Replace the PCM and perform the resetting

DTC troubleshooting completed.

DTC B1342

ECU is faulted

DETECTION
CONDITION

Instrument cluster malfunction

POSSIBLE
CAUSE

• Instrument cluster malfunction

ACTION

Replace the instrument cluster.
(See 09-22-2 INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)

1871-1U-06B(09-02C).fm 14 ページ２００６年３月１５日水曜日午前１１時３９分

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Mazda CX 7. Manual — part 335

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