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Mazda CX 7. Manual - part 333

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

09-02C–3

09-02C

M-MDS

1. Connect the M-MDS to the DLC-2.
2. Verify if any DTCs are displayed.

• If any DTCs are displayed, carry out

troubleshooting according to the
corresponding DTC inspection.

3. Disconnect the M-MDS.

End Of Sie

DTC TABLE[IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]

id0902e5800300

DLC-2

acxuuw00002447

DTC

Detection condition

Page

Security light flashing pattern

M-MDS display

Instrument

cluster

PCM

B1681

P1260

No detected communication
with the coil

09-02C-5 SECURITY
LIGHT 11, DTC B1681/
P1260[IMMOBILIZER
SYSTEM (KEYLESS
ENTRY SYSTEM)]

B2103

P1260

• Coil antenna malfunction

• The PCM determined a

malfunction in the coil
antenna even though it is
normal.

09-02C-7 SECURITY
LIGHT 12, DTC B2103/
P1260[IMMOBILIZER
SYSTEM (KEYLESS
ENTRY SYSTEM)]

B1600

P1260

The key ID number data
cannot be read.

09-02C-7 SECURITY
LIGHT 13, DTC B1600/
P1260[IMMOBILIZER
SYSTEM (KEYLESS
ENTRY SYSTEM)]

B2431

P1260

Key ID number registration
error

09-02C-9 SECURITY
LIGHT 13, DTC B2431/
P1260[IMMOBILIZER
SYSTEM (KEYLESS
ENTRY SYSTEM)]

B1602

P1260

The instrument cluster cannot
read key ID number data
normally.

09-02C-10 SECURITY
LIGHT 14, DTC B1602/
P1260[IMMOBILIZER
SYSTEM (KEYLESS
ENTRY SYSTEM)]

B1601

P1260

The instrument cluster has
detected unregistered key ID
number.

09-02C-11 SECURITY
LIGHT 15, DTC B1601/
P1260[IMMOBILIZER
SYSTEM (KEYLESS
ENTRY SYSTEM)]

U2510

P1260

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

09-02C-12 SECURITY
LIGHT 16, DTC U2510/
P1260, U1147/
P1260[IMMOBILIZER
SYSTEM (KEYLESS
ENTRY SYSTEM)]

U1147

P1260

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

B1213

P1260

Only one key ID number is
registered.

09-02C-12 SECURITY
LIGHT 21, DTC B1213/
P1260[IMMOBILIZER
SYSTEM (KEYLESS
ENTRY SYSTEM)]

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

09-02C–4

: The letters at the beginning of each DTC are only displayed when using the M-MDS, and refer to the following:

B= Body system, P= Powertrain system, U= Network communication system.

End Of Sie

PID/DATA MONITOR INSPECTION[IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]

id0902e5800400

1. Connect the M-MDS to the DLC-2.
2. Display the PID/data monitor items.

• Verify a displayed item according to the PID/

data monitor table.

3. Disconnect the M-MDS.

End Of Sie

PID/DATA MONITOR TABLE[IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]

id0902e5800500

End Of Sie

B2141

P1260

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

09-02C-13 SECURITY
LIGHT 22, DTC B2141/
P1260[IMMOBILIZER
SYSTEM (KEYLESS
ENTRY SYSTEM)]

B2139

P1260

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

09-02C-14 SECURITY
LIGHT 23, DTC B2139/
P1260[IMMOBILIZER
SYSTEM (KEYLESS
ENTRY SYSTEM)]

Not illuminated

B1342

Instrument cluster malfunction

09-02C-14 DTC
B1342[IMMOBILIZER
SYSTEM (KEYLESS
ENTRY SYSTEM)]

DTC

Detection condition

Page

Security light flashing pattern

M-MDS display

Instrument

cluster

PCM

DLC-2

acxuuw00002457

PID name (definition)

Detection condition

NUMKEYS
(Number of key ID numbers registered in the instrument cluster)

Number of key ID numbers registered: 0— 8

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

09-02C–5

09-02C

SECURITY LIGHT 11, DTC B1681/P1260[IMMOBILIZER SYSTEM (KEYLESS ENTRY SYSTEM)]

id0902e5800600

Diagnostic Procedure

SECURITY LIGHT: 11

No detected communication with the coil antenna

DTC: B1681/P1260

DETECTION CONDITION

• No detected communication with the coil antenna

POSSIBLE CAUSE

• Coil antenna malfunction

• Instrument cluster malfunction

• Malfunction in the related wiring harnesses

STEP

INSPECTION

ACTION

INSPECT COIL ANTENNA POWER SUPPLY

SYSTEM

• Disconnect the coil antenna connector.

• Turn the ignition switch to the ON position.

• Measure the voltage at coil antenna terminal D.

— Is the voltage 8 V or more?

Yes

Go to the next step.

Repair the wiring harness.

INSPECT WIRING HARNESS BETWEEN

COIL ANTENNA AND GROUND

• Turn the ignition switch to the LOCK position.

• Inspect the wiring harness between coil antenna

terminal C and ground for the following:

— Short to power supply

— Open circuit

• Is the wiring harness normal?

Yes

Go to the next step.

Repair the wiring harness.

INSPECT COIL ANTENNA INPUT SIGNAL

CIRCUIT

• Connect the coil antenna connector.

• Turn the ignition switch to the ON position.

• Measure the voltage at coil antenna terminal B.

— Is the voltage 8 V or more?

Yes

Go to Step 7.

Go to the next step.

IG1

INSTRUMENT CLUSTER

COIL ANTENNA

INSTRUMENT CLUSTER

WIRING HARNESS-SIDE CONNECTOR

COIL ANTENNA

WIRING HARNESS-SIDE CONNECTOR

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

09-02C–6

End Of Sie

INSPECT COIL ANTENNA INPUT SIGNAL

CIRCUIT

• Turn the ignition switch to the LOCK position.

• Disconnect the instrument cluster connector.

• Turn the ignition switch to the ON position.

• Measure the voltage at instrument cluster

terminal 2S.
— Is the voltage 8 V or more?

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.

INSPECT COMMUNICATION CIRCUIT

(INPUT) FOR CONTINUITY

• Turn the ignition switch to the LOCK position.

• Is there continuity between coil antenna terminal

B and instrument cluster terminal 2S?

Yes

Go to the next step.

Repair the wiring harness.

INSPECT COIL ANTENNA INPUT SIGNAL

CIRCUIT

• Measure the resistance between coil antenna

terminal B and ground.
— Is the resistance 10 kilohms or more?

Yes

Replace the coil antenna.
(See 09-14-11 COIL ANTENNA REMOVAL/
INSTALLATION.)

Repair the wiring harness.

INSPECT COIL ANTENNA OUTPUT SIGNAL

CIRCUIT

• Connect the coil antenna connector and the

instrument cluster connector.

• Turn the ignition switch to the ON position.

• Measure the voltage at coil antenna terminal A.

— Is the voltage 8 V or more?

Yes

Replace the coil antenna.
(See 09-14-11 COIL ANTENNA REMOVAL/
INSTALLATION.)

Go to the next step.

INSPECT COIL ANTENNA OUTPUT SIGNAL

CIRCUIT

• Turn the ignition switch to the LOCK position.

• Disconnect the coil antenna connector.

• Turn the ignition switch to the ON position.

• Measure the voltage at coil antenna terminal A.

— Is the voltage 8 V or more?

Yes

Replace the coil antenna.
(See 09-14-11 COIL ANTENNA REMOVAL/
INSTALLATION.)

Go to the next step.

INSPECT COMMUNICATION CIRCUIT

(OUTPUT) FOR CONTINUITY

• Turn the ignition switch to the LOCK position.

• Disconnect the instrument cluster connector.

• Is there continuity between coil antenna terminal

A and instrument cluster terminal 2Q?

Yes

Repair the wiring harness.

Go to the next step.

INSPECT COIL ANTENNA OUTPUT SIGNAL

CIRCUIT

• Measure the resistance between instrument

cluster terminal 2Q and ground.

— Is the resistance 10 kilohms or more?

Yes

Repair the wiring harness.

STEP

INSPECTION

ACTION

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