DTC U1A4B:54 [REAR VEHICLE MONITORING SYSTEM]

id0902z2668600

Malfunction location

• Radar aiming is not performed or radar sensor axis is deviated (Rear vehicle monitoring control module (LH))

Detection condition

• Rear vehicle monitoring control module (LH) radar aiming is out of range for 1 s or more.

Possible Causes

• Rear vehicle monitoring control module (LH) radar aiming is not performed

• Rear vehicle monitoring control module (LH) radar sensor axis is deviated

• Rear vehicle monitoring control module (LH) malfunction

Diagnostic Procedure

STEP	INSPECTION		ACTION
1	PERFORM REAR VEHICLE MONITORING CONTROL MODULE (LH) RADAR AIMING • Perform the rear vehicle monitoring radar aiming (LH) using the M-MDS. (See REAR VEHICLE MONITORING RADAR AIMING.) • Clear the DTC from the rear vehicle monitoring control module using the M-MDS. (See CLEARING DTC [REAR VEHICLE MONITORING SYSTEM].) • Verify the rear vehicle monitoring system DTC using the M-MDS. (See DTC INSPECTION [REAR VEHICLE MONITORING SYSTEM].) • Is the same DTC present?	Yes	Perform the rear vehicle monitoring radar aiming (LH) again using the M-MDS, then go to the next step. (See REAR VEHICLE MONITORING RADAR AIMING.)
1		No	Go to Step 3.
2	VERIFY TROUBLESHOOTING COMPLETED • Clear the DTC from the rear vehicle monitoring control module using the M-MDS. (See CLEARING DTC [REAR VEHICLE MONITORING SYSTEM].) • Verify the rear vehicle monitoring system DTC using the M-MDS. (See DTC INSPECTION [REAR VEHICLE MONITORING SYSTEM].) • Is the same DTC present?	Yes	Replace the rear vehicle monitoring control module (LH), then go to the next step. (See REAR VEHICLE MONITORING CONTROL MODULE REMOVAL/INSTALLATION.)
2		No	Go to the next step.
3	VERIFY THAT NO OTHER DTCs ARE PRESENT • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [REAR VEHICLE MONITORING SYSTEM].)
3		No	DTC troubleshooting completed.