Mazda CX 7. Manual - part 330

 

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Mazda CX 7. Manual - part 330

 

 

ON-BOARD DIAGNOSTIC

[IMMOBILIZER SYSTEM (ADVANCED KEYLESS SYSTEM)]

09-02B–5

09-02B

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

id0902e3800600

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 keyless control module

• Malfunction in the related wiring harnesses

STEP

INSPECTION

ACTION

1

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.

No

Repair the wiring harness.

2

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.

No

Repair the wiring harness.

3

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.

No

Go to the next step.

4

INSPECT COIL ANTENNA INPUT SIGNAL 

CIRCUIT

• Turn the ignition switch to the LOCK position.

• Disconnect the keyless control module 

connector.

• Turn the ignition switch to the ON position.

• Measure the voltage at keyless control module 

terminal 3U.
— Is the voltage 8 V or more?

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].)

No

Go to the next step.

5

INSPECT COMMUNICATION CIRCUIT 

(INPUT) FOR CONTINUITY

• Turn the ignition switch to the LOCK position.

• Is there continuity between coil antenna terminal 

B and keyless control module terminal 3U?

Yes

Go to the next step.

No

Repair the wiring harness.

IG1

D

C

B

A

3V

3U

2B

KEYLESS CONTROL
MODULE

COIL ANTENNA

1871-1U-06B(09-02B).fm  5 ページ  2006年3月15日 水曜日 午前11時39分

ON-BOARD DIAGNOSTIC

[IMMOBILIZER SYSTEM (ADVANCED KEYLESS SYSTEM)]

09-02B–6

End Of Sie

SECURITY LIGHT 12, DTC B2103/P1260[IMMOBILIZER SYSTEM (ADVANCED KEYLESS SYSTEM)]

id0902e3800700

Diagnostic Procedure

6

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.)

No

Repair the wiring harness.

7

INSPECT COIL ANTENNA OUTPUT SIGNAL 

CIRCUIT

• Connect the coil antenna connector and the 

keyless control module 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.)

No

Go to the next step.

8

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.)

No

Go to the next step.

9

INSPECT COMMUNICATION CIRCUIT 

(OUTPUT) FOR CONTINUITY

• Turn the ignition switch to the LOCK position.

• Disconnect the keyless control module 

connector.

• Is there continuity between coil antenna terminal 

A and keyless control module terminal 3V?

Yes

Repair the wiring harness.

No

Go to the next step.

10

INSPECT COIL ANTENNA OUTPUT SIGNAL 

CIRCUIT

• Measure the resistance between keyless control 

module terminal 3V and ground.
— Is the resistance 10 kilohms or more?

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].)

No

Repair the wiring harness.

STEP

INSPECTION

ACTION

SECURITY LIGHT: 12

• Coil antenna malfunction

• The PCM determined a malfunction in the coil antenna even though it is normal.

 DTC: B2103/P1260

DETECTION CONDITION

• Coil antenna malfunction

• The PCM determined a malfunction in the coil antenna even though it is normal.

POSSIBLE CAUSE

• Coil antenna malfunction

• Poor connection of the coil antenna connector

• PCM malfunction

STEP

INSPECTION

ACTION

1

INSPECT CONNECTOR CONNECTION

• Are the coil antenna connector and the keyless 

control module connector securely connected?

Yes

Replace the coil antenna, then go to the next step.
 (See 09-14-11 COIL ANTENNA REMOVAL/
INSTALLATION.)

No

Connect the connector securely.

2

INSPECT PCM

• Turn the ignition switch to the ON position.

• Is the DTC displayed?

— Security light: 12

— M-MDS: B2103/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.

1871-1U-06B(09-02B).fm  6 ページ  2006年3月15日 水曜日 午前11時39分

ON-BOARD DIAGNOSTIC

[IMMOBILIZER SYSTEM (ADVANCED KEYLESS SYSTEM)]

09-02B–7

09-02B

End Of Sie

SECURITY LIGHT 13, DTC B1600/P1260[IMMOBILIZER SYSTEM (ADVANCED KEYLESS SYSTEM)]

id0902e3800800

Diagnostic Procedure

SECURITY LIGHT: 13

The key ID number data cannot be read.

 DTC: B1600/P1260

DETECTION CONDITION

• The key ID number data cannot be read.

POSSIBLE CAUSE

• No transponder in the key

• Transponder malfunction (Key ID number is not output)

• Coil antenna malfunction

• Keyless control module malfunction

• Any of the following items are touching or near the key head.

— Spare keys

— Keys for other vehicles equipped with an immobilizer system

— Any metallic object

— Any electronic device, or any credit or other cards with magnetic strips

STEP

INSPECTION

ACTION

1

VERIFY DTC

• Is B1600/P1260 displayed?

Yes

Go to Step 3.

No

Go to the next step.

2

VERIFY DTC

• Is B2431/P1260 displayed?

Yes

Perform the DTC inspection for “SECURITY LIGHT: 13, 
M-MDS: B2431/P1260”.
 (See 09-02B-8 SECURITY LIGHT 13, DTC B2431/
P1260[IMMOBILIZER SYSTEM (ADVANCED 
KEYLESS SYSTEM)].)

No

Go to the next step.

3

VERIFY WHETHER KEY IS VALID OR NOT

• Are there any keys with which the engine can be 

started, other than the key that is a cause of the 
displayed DTC?

Yes

Go to Step 5.

No

Go to the next step.

4

VERIFY WHETHER MALFUNCTION IS IN 

KEY OR COIL ANTENNA

• Using the M-MDS, register an additional key.

 (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.

• Verify the DTC using the M-MDS.

— Is B1600/P1260 displayed again?

Yes

Replace the coil antenna, then go to Step 6.
 (See 09-14-11 COIL ANTENNA REMOVAL/
INSTALLATION.)

No

• Dispose of the malfunctioning key.

• Register a new key if necessary.

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

METAL RING LYING ON KEY HEAD

METAL PART OF ANOTHER 
KEY TOUCHING KEY HEAD

KEY IS NEAR OR TOUCHING 
ANOTHER IMMOBILIZER SYSTEM KEY

EXAMPLES:

1871-1U-06B(09-02B).fm  7 ページ  2006年3月15日 水曜日 午前11時39分

ON-BOARD DIAGNOSTIC

[IMMOBILIZER SYSTEM (ADVANCED KEYLESS SYSTEM)]

09-02B–8

End Of Sie

SECURITY LIGHT 13, DTC B2431/P1260[IMMOBILIZER SYSTEM (ADVANCED KEYLESS SYSTEM)]

id0902e3800900

Diagnostic Procedure

5

VERIFY WHETHER MALFUNCTION IS IN 

KEY OR COIL ANTENNA

• Using another valid key, turn the ignition switch 

to the ON position.

• Verify the DTC Using the M-MDS.

— Is B1600/P1260 displayed again?

Yes

Replace the coil antenna, then go to the next step.
 (See 09-14-11 COIL ANTENNA REMOVAL/
INSTALLATION.)

No

• Dispose of the malfunctioning key.

• Register a new key if necessary.

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

6

INSPECT KEYLESS CONTROL MODULE

• Using the registered key, turn the ignition switch 

to the ON position.

— Is B1600/P1260 displayed again?

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].)

No

DTC troubleshooting completed.

STEP

INSPECTION

ACTION

SECURITY LIGHT: 13

Key ID number registration error

 DTC: B2431/P1260

DETECTION CONDITION

• Key ID number registration error

POSSIBLE CAUSE

• Errors during key ID number registration procedure

• Any of the following items are touching or near the key head.

— Spare keys

— Keys for other vehicles equipped with an immobilizer system

— Any metallic object

— Any electronic device, or any credit or other cards with magnetic strips

STEP

INSPECTION

ACTION

1

VERIFY DTC

• Is B2431/P1260 displayed?

Yes

Go to Step 3.

No

Go to the next step.

2

VERIFY DTC

• Is B1600/P1260 displayed?

Yes

Perform the DTC inspection for “SECURITY LIGHT: 13, 
M-MDS: B1600/P1260”.
 (See 09-02B-7 SECURITY LIGHT 13, DTC B1600/
P1260[IMMOBILIZER SYSTEM (ADVANCED 
KEYLESS SYSTEM)].)

No

Go to the next step.

METAL RING LYING ON KEY HEAD

METAL PART OF ANOTHER 
KEY TOUCHING KEY HEAD

KEY IS NEAR OR TOUCHING 
ANOTHER IMMOBILIZER SYSTEM KEY

EXAMPLES:

1871-1U-06B(09-02B).fm  8 ページ  2006年3月15日 水曜日 午前11時39分

 

 

 

 

 

 

 

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