DTC U1A4B:54 [REAR VEHICLE MONITORING SYSTEM]

id0902z2668600

Description

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

Detection condition

•  Malfunction in radar aiming of the rear vehicle monitoring control module (RH) detected for 1 s or more.

Fail-safe function

•  Inhibits the rear vehicle monitoring system.

Possible cause

•  Rear vehicle monitoring radar aiming (RH) was not performed.

•  Deviation of rear vehicle monitoring control module (RH) radar sensor axis

•  Rear vehicle monitoring control module (RH) malfunction

System wiring diagram

Not applicable

Description	Radar aiming is not performed or radar sensor axis is deviated (Rear vehicle monitoring control module (RH))
Detection condition	• Malfunction in radar aiming of the rear vehicle monitoring control module (RH) detected for 1 s or more.
Fail-safe function	• Inhibits the rear vehicle monitoring system.
Possible cause	• Rear vehicle monitoring radar aiming (RH) was not performed. • Deviation of rear vehicle monitoring control module (RH) radar sensor axis • Rear vehicle monitoring control module (RH) malfunction
System wiring diagram	Not applicable

Diagnostic Procedure

Step	Inspection		Action
1	PERFORM REAR VEHICLE MONITORING RADAR AIMING (RH) • Perform the rear vehicle monitoring radar aiming (RH). (See REAR VEHICLE MONITORING RADAR AIMING.) • Clear the DTC for the rear vehicle monitoring control module using the M-MDS. (See CLEARING DTC [REAR VEHICLE MONITORING SYSTEM].) • Switch the ignition ON (engine off or on) and wait for 2.5 s or more. • Retrieve the rear vehicle monitoring control module DTCs using the M-MDS. (See DTC INSPECTION [REAR VEHICLE MONITORING SYSTEM].) • Is the same DTC displayed?	Yes	Perform the rear vehicle monitoring radar aiming (RH) again, then go to the next step. (See REAR VEHICLE MONITORING RADAR AIMING.)
1		No	Go to Step 3.
2	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Clear the DTC for the rear vehicle monitoring control module using the M-MDS. (See CLEARING DTC [REAR VEHICLE MONITORING SYSTEM].) • Switch the ignition ON (engine off or on) and wait for 2.5 s or more. • Retrieve the rear vehicle monitoring control module DTCs using the M-MDS. (See DTC INSPECTION [REAR VEHICLE MONITORING SYSTEM].) • Is the same DTC displayed?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the rear vehicle monitoring control module (RH). (See REAR VEHICLE MONITORING CONTROL MODULE REMOVAL/INSTALLATION.) Go to the next step.
2		No	Go to the next step.
3	VERIFY IF OTHER DTCs DISPLAYED • Are any other DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [REAR VEHICLE MONITORING SYSTEM].)
3		No	DTC troubleshooting completed.