DTC B1093 [Advanced Keyless And Start System]

DTC B1093 CHART

DTC B1093	Steering lock unit communication error
DETECTION CONDITION	Unprogrammed steering lock unit.
POSSIBLE CAUSE	Open or short circuit in wiring harness between keyless control module and steering lock unit Steering lock unit malfunction Keyless control module malfunction
Courtesy of MAZDA MOTORS CORP.

DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	INSPECT COMMUNICATION CIRCUIT FOR CONTINUITY  Disconnect keyless control module connector and steering lock unit connector. Inspect the wiring harness between keyless control module connector terminal 3H and steering lock unit connector terminal K for the following? Short to body ground Short to power supply Open circuit Is the wiring harness normal?	Yes	Perform the resetting procedure for the steering lock unit. (See STEERING LOCK UNIT ID CODE REGISTRATION [WITH ADVANCED KEYLESS SYSTEM] ) Go to the next step.
		No	Repair the wiring harness between the steering lock unit and keyless control module. Go to next step.
2	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 STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION .) (See STEERING LOCK UNIT ID CODE REGISTRATION [WITH ADVANCED KEYLESS SYSTEM] ) Go to the next step.
		No	DTC troubleshooting completed.
3	INSPECT KEYLESS CONTROL MODULE  Turn the ignition switch to the ON position. Is the DTC displayed? M-MDS: B1093	Yes	Replace the keyless control module and perform the resetting procedure for the advanced keyless system when replacing the keyless control module. (See KEYLESS CONTROL MODULE REMOVAL/INSTALLATION .) (See CARD KEY ID CODE REGISTRATION [WITH ADVANCED KEYLESS SYSTEM] ) (See STEERING LOCK UNIT ID CODE REGISTRATION [WITH ADVANCED KEYLESS SYSTEM] ) (See KEYLESS CONTROL MODULE CONFIGURATION ) (See IMMOBILIZER SYSTEM-RELATED PARTS PROGRAMMING [WITH ADVANCED KEYLESS SYSTEM] )
		No	DTC troubleshooting completed.