Mazda CX-7 2007 Workshop Manual page 1307

ON-BOARD DIAGNOSTIC [ADVANCED KEYLESS SYSTEM]
DTC U0236[ADVANCED KEYLESS SYSTEM]
DTC U0236 Steering lock unit communication system.
DETECTION
• Steering lock unit communication error.
CONDITION
• Steering lock unit maifunction
POSSIBLE
• Open or short circuit in wiring harness between keyless control module and steering lock unit
CAUSE
• Keyless control module malfunction
Diagnostic procedure
STEP INSPECTION
1
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?
2 INSPECT KEYLESS CONTROL MODULE
• Turn the ignition switch to the ON position.
• Is the DTC displayed?
— M-MDS: U0236
End Of Sie
DTC B1093[ADVANCED KEYLESS SYSTEM]
DTC B1093 Unprogrammed steering lock unit.
DETECTION
• Unprogrammed steering lock unit.
CONDITION
• Steering lock unit malfunction
POSSIBLE
• Open or short circuit in wiring harness between keyless control module and steering lock unit
CAUSE
• Keyless control module malfunction
Diagnostic procedure
STEP INSPECTION
1 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?
2 INSPECT STEERING LOCK UNIT
• Turn the ignition switch to the ON position.
• Is the DTC displayed?
— M-MDS: B1093
3 INSPECT KEYLESS CONTROL MODULE
• Turn the ignition switch to the ON position.
• Is the DTC displayed?
— M-MDS: B1093
End Of Sie
ACTION
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.)
No Repair the wiring harness between the steering lock unit
and keyless control module..
Go to next step
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].)
No DTC troubleshooting completed.
ACTION
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
No Repair the wiring harness between the steering lock unit
and keyless control module.
Go to the next step
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
No DTC troubleshooting completed.
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].)
No DTC troubleshooting completed.
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09-02A
09-02A–7