Millimeter Wave Radar Unit Aiming/DTC Troubleshooting: 120, 121, 122, 123, 124

DTCs (if the aiming is incomplete)
NOTE: If the aiming is incomplete, the MID indicates a DTC. The adaptive cruise control (ACC) unit does not store the DTC, and you can not read the DTCs with the HDS, so note the DTC before cycling the ignition key. If the aiming is finished while there is a DTC on the MID, DTC 107 is indicated to show the aiming is incomplete.

DTC indication (on the MID)
Cause
How to solve
DTC 120
Two or more aiming targets exist.
Remove all reflective objects except the correct special tools, and repeat the aiming procedure.
DTC 121
The width of the aiming target is out of specification.
Use the genuine aiming target, and repeat the aiming procedure.
DTC 122
The distance of the aiming target is out of specification.
Set the distance to the aiming target 4.9−5.1 m (16.0−16.7 ft), and repeat the aiming procedure.
DTC 123
The aiming target is moved.
Do the aiming procedure again.
DTC 124
The right and left position of the aiming target is out of specification.
Reset the aiming target at the correct position, and repeat the aiming procedure.