DTC B1093 [ADVANCED KEYLESS AND START SYSTEM]

id0902e1802800

DTC B1093

Steering lock unit communication error

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

DTC B1093	Steering lock unit communication error
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

Diagnostic procedure

STEP	INSPECTION		ACTION
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?	Yes	Perform the resetting procedure for the steering lock unit. (See STEERING LOCK UNIT ID CODE REGISTRATION [ADVANCED KEYLESS SYSTEM].) Go to the next step.
1		No	Repair the wiring harness between the steering lock unit and keyless control module. Go to the next step.
2	INSPECT STEERING LOCK UNIT • Clear the DTC using the M-MDS. • 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.) Go to the next step.
2		No	DTC troubleshooting completed.
3	INSPECT KEYLESS CONTROL MODULE • Clear the DTC using the M-MDS. • 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 [ADVANCED KEYLESS SYSTEM].)
3		No	DTC troubleshooting completed.