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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