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Mazda CX 7. Manual - part 327

ON-BOARD DIAGNOSTIC [ADVANCED KEYLESS SYSTEM]

09-02A–5

09-02A

DTC B2477[ADVANCED KEYLESS SYSTEM]

id0902e1802300

Diagnostic procedure

End Of Sie

DTC B1317/B1318[ADVANCED KEYLESS SYSTEM]

id0902e1802400

Diagnostic procedure

End Of Sie

DTC B2477

Configuration error.

POSSIBLE

CAUSE

• Keyless control module configuration has not been performed correctly

POSSIBLE

CAUSE

• Keyless control module configuration error.

• Malfunction in the keyless control module internal circuit

STEP

INSPECTION

ACTION

PERFORM INSTRUMENT KEYLESS
CONTROL MODULE CONFIGURATION

• Perform keyless control module

configuration.

• Is the DTC displayed?

— M-MDS: B2477

Yes

Replace the keyless control module and perform the
resetting procedure for the advanced keyless system when
replacing the keyless control module.
(See 09-14-30 KEYLESS CONTROL MODULE REMOVAL/
INSTALLATION[ADVANCED KEYLESS SYSTEM].)

Go to the next step.

VERIFY TROUBLESHOOTING OF DTC B2477
COMPLETED

• Clear the DTC from the memory.

• Is any DTC displayed?

Yes

Go to the applicable DTC inspection.

DTC troubleshooting completed.

DTC B1317

Keyless control module power supply voltage increases (16.1 V or more).

DTC B1318

Keyless control module power supply voltage decreases (less than 9 V).

POSSIBLE

CAUSE

• When the keyless control module power supply voltage is not within 9—16 V

POSSIBLE

CAUSE

• Open or short circuit in wiring harness between battery and keyless control module

• Battery malfunction

• Keyless control module malfunction

STEP

INSPECTION

ACTION

INSPECT FUSE

• Remove the ROOM fuse.

• Is the fuse normal?

Yes

Go to the next step.

Replace the fuse.

INSPECT BATTERY

• Measure the battery positive voltage.

• Is the voltage 9 V—16 V?

Yes

Go to the next step.

The battery has a malfunction.
Inspect the charge/discharge system/

INSPECT WIRING HARNESS BETWEEN
BATTERY AND KEYLESS CONTROL
MODULE

• Turn the ignition switch to the ON position.

• Measure the keyless control module terminal

2A voltage

• Is the voltage 9 V—16 V?

Yes

DTC troubleshooting completed.

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ON-BOARD DIAGNOSTIC [ADVANCED KEYLESS SYSTEM]

09-02A–6

DTC B2170[ADVANCED KEYLESS SYSTEM]

id0902e1802500

Diagnostic procedure

End Of Sie

DTC B1126[ADVANCED KEYLESS SYSTEM]

id0902e1802600

Diagnostic procedure

End Of Sie

DTC B2170

Push switch.

DETECTION

CONDITION

• Detect the push switch OFF signal when ignition switch is ON position.

POSSIBLE

CAUSE

• Steering lock unit malfunction

• Open or short circuit in wiring harness between keyless control module and steering lock unit

• Keyless control module malfunction

STEP

INSPECTION

ACTION

INSPECT COMMUNICATION CIRCUIT FOR
CONTINUITY

• Disconnect keyless control module

connector and steering lock unit connector.

• Is there continuity between keyless control

module terminal 3E and steering lock unit
terminal E?

Yes

Replace the steering lock unit and perform the resetting
procedure for the steering lock unit.
(See 06-14-6 STEERING WHEEL AND COLUMN
REMOVAL/INSTALLATION.)

Repair the wiring harness between the steering lock unit
and keyless control module.

INSPECT KEYLESS CONTROL MODULE

• Turn the ignition switch to the ON position.

• Is the DTC displayed?

— M-MDS: B2170

Yes

DTC troubleshooting completed.

DTC B1126

Steering lock unit internal malfunction.

DETECTION

CONDITION

• Detect the steering lock unit maifunction signal

POSSIBLE

CAUSE

• Steering lock unit maifunction

STEP

INSPECTION

ACTION

INSPECT STEERING LOCK UNIT

• Turn the ignition switch to the ON position.

• Is the DTC displayed?

— M-MDS: B1126

Yes

Replace the steering lock unit and perform the resetting
procedure for the advanced keyless system when replacing
the keyless control module.
(See 06-14-6 STEERING WHEEL AND COLUMN
REMOVAL/INSTALLATION.)

DTC troubleshooting completed.

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ON-BOARD DIAGNOSTIC [ADVANCED KEYLESS SYSTEM]

09-02A–7

09-02A

DTC U0236[ADVANCED KEYLESS SYSTEM]

id0902e1802700

Diagnostic procedure

End Of Sie

DTC B1093[ADVANCED KEYLESS SYSTEM]

id0902e1802800

Diagnostic procedure

End Of Sie

DTC U0236

Steering lock unit communication system.

DETECTION

CONDITION

• Steering lock unit communication error.

POSSIBLE

CAUSE

• Steering lock unit maifunction

• Open or short circuit in wiring harness between keyless control module and steering lock unit

• Keyless control module malfunction

STEP

INSPECTION

ACTION

INSPECT COMMUNICATION CIRCUIT FOR
CONTINUITY

• Disconnect keyless control module

connector and steering lock unit connector.

• Is there continuity between keyless control

module terminal 3H and steering lock unit
terminal K?

Yes

Replace the steering lock unit and perform the resetting
procedure for the steering lock unit.
(See 06-14-6 STEERING WHEEL AND COLUMN
REMOVAL/INSTALLATION.)

Repair the wiring harness between the steering lock unit
and keyless control module..
Go to next step

INSPECT KEYLESS CONTROL MODULE

• Turn the ignition switch to the ON position.

• Is the DTC displayed?

— M-MDS: U0236

Yes

DTC troubleshooting completed.

DTC B1093

Unprogrammed steering lock unit.

DETECTION

CONDITION

• Unprogrammed steering lock unit.

POSSIBLE

CAUSE

• Steering lock unit malfunction

• Open or short circuit in wiring harness between keyless control module and steering lock unit

• Keyless control module malfunction

STEP

INSPECTION

ACTION

INSPECT COMMUNICATION CIRCUIT FOR
CONTINUITY

• Disconnect keyless control module

connector and steering lock unit connector.

• Is there continuity between keyless control

module terminal 3H and steering lock unit
terminal E?

Yes

Perform the resetting procedure for the steering lock unit.
(See 09-14-35 STEERING LOCK UNIT ID CODE
REGISTRATION[ADVANCED KEYLESS SYSTEM].)
Go to the next step

Repair the wiring harness between the steering lock unit
and keyless control module.
Go to the next step

INSPECT STEERING LOCK UNIT

• Turn the ignition switch to the ON position.

• Is the DTC displayed?

— M-MDS: B1093

Yes

Replace the steering lock unit and perform the resetting
procedure for the steering lock unit..
(See 06-14-6 STEERING WHEEL AND COLUMN
REMOVAL/INSTALLATION.)
Go to the next step

DTC troubleshooting completed.

INSPECT KEYLESS CONTROL MODULE

• Turn the ignition switch to the ON position.

• Is the DTC displayed?

— M-MDS: B1093

Yes

DTC troubleshooting completed.

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ON-BOARD DIAGNOSTIC [ADVANCED KEYLESS SYSTEM]

09-02A–8

DTC U0214[ADVANCED KEYLESS SYSTEM]

id0902e1802900

Diagnostic procedure

End Of Sie

DTC B1133[ADVANCED KEYLESS SYSTEM]

id0902e1803000

Diagnostic procedure

DTC U0214

Keyless receiver.

DETECTION

CONDITION

• When the keyless receiver power supply voltage is less than 7.5 V.

POSSIBLE

CAUSE

• Keyless receiver malfunction

• Open or short circuit in wiring harness between keyless control module and keyless receiver

• Keyless control module malfunction

STEP

INSPECTION

ACTION

INSPECT WIRING HARNESS BETWEEN
KEYLESS RECEIVER AND GROUND

• Disconnect keyless receiver connector.

• Is there continuity between keyless receiver

terminal E and ground?

Yes

Go to next step.

Repair the wiring harness between the keyless receiver and
ground.
Go to next step.

INSPECT COMMUNICATION CIRCUIT FOR
CONTINUITY

• Disconnect keyless control module

connector and keyless receiver connector.

• Inspect the continuity between the following

connector terminals/
— keyless control module: 3A—keyless

receiver: A

— keyless control module: 3C—keyless

receiver: C

• Is voltage more than 7.5 V?

Yes

Go to next step.

Repair the wiring harness between the keyless receiver and
ground.
Go to next step.

INSPECT KEYLESS RECEIVER POWER
SUPPLY CIRCUIT

• Turn the ignition switch to the ON position.

• Measure voltage at terminal 3A of keyless

control module connector.

• Is voltage more than 7.5 V?

Yes

Replace keyless receiver.
(See 09-14-36 KEYLESS RECEIVER REMOVAL/
INSTALLATION.)

DTC B1133

Keyless antenna (exterior, LF)

DETECTION

CONDITION

• Keyless antenna dose not operated.

POSSIBLE

CAUSE

• Keyless antenna (exterior, LF) malfunction

• Open or short circuit in wiring harness between keyless control module and keyless antenna

• Keyless control module malfunction

STEP

INSPECTION

ACTION

INSPECT COMMUNICATION CIRCUIT FOR
CONTINUITY

• Disconnect keyless control module

connector and keyless antenna (exterior, LF)
connector.

• Inspect the continuity between the following

connector terminals.

— keyless control module: 1A—keyless

antenna: A

— keyless control module: 1B—keyless

antenna: B

• Is there continuity?

Yes

Replace keyless antenna (driver’s door).
(See 09-14-37 KEYLESS ANTENNA REMOVAL/
INSTALLATION[ADVANCED KEYLESS SYSTEM].)
Go to next step.

Repair the wiring harness between the keyless antenna
(exterior, LF) and keyless control module.
Go to next step.

INSPECT KEYLESS CONTROL MODULE

• Turn the ignition switch to the ON position.

• Is the DTC displayed?

— M-MDS: B1133

Yes

DTC troubleshooting completed.

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