DTC U0423:68 [HEADLIGHT AUTO LEVELING SYSTEM]

id0902i7017600

Description

Error signal received from instrument cluster

•  Selector lever R position (ATX)/shift lever reverse (MTX) signal error
•  Selector lever R position (ATX)/shift lever reverse (MTX) signal not determined
Detection condition
•  Selector lever R position (ATX)/shift lever reverse (MTX) signal error
―  Auto leveling control module received the selector lever R position (ATX)/shift lever reverse (MTX) signal error for 5 s or more with the ignition switched ON (engine off or on).
•  Selector lever R position (ATX)/shift lever reverse (MTX) signal not determined
―  Auto leveling control module detected the undetermined selector lever R position (ATX)/shift lever reverse (MTX) signal.
Fail-safe function
•  Selector lever R position (ATX)/shift lever reverse (MTX) signal error
―  Control of the headlight auto leveling system is continued.
•  Selector lever R position (ATX)/shift lever reverse (MTX) signal not determined
―  Control of the headlight auto leveling system is continued.
Possible cause
•  DTCs are stored in the instrument cluster.
•  Instrument cluster malfunction
•  Auto leveling control module malfunction
System wiring diagram
Not applicable

Diagnostic Procedure

Step

Inspection

Action
1
VERIFY INSTRUMENT CLUSTER DTCs
•  Retrieve the instrument cluster DTCs using the M-MDS.
•  Are any DTCs displayed?
Yes
Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [INSTRUMENT CLUSTER].)
No
Go to the next step.
2
PERFORM DTC INSPECTION AND VERIFY INSTRUMENT CLUSTER MALFUNCTION
•  Clear the DTC for the auto leveling control module using the M-MDS.
•  Switch the ignition ON (engine off or on) and wait for 5 s or more.
•  Retrieve the auto leveling control module DTCs using the M-MDS.
•  Is the same DTC displayed?
Yes
Replace the instrument cluster, then go to the next step.
(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
No
Go to Step 4.
3
VERIFY THAT REPAIRS HAVE BEEN COMPLETED
•  Clear the DTC for the auto leveling control module using the M-MDS.
•  Switch the ignition ON (engine off or on) and wait for 5 s or more.
•  Retrieve the auto leveling control module DTCs using the M-MDS.
•  Is the same DTC displayed?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the auto leveling control module.
Go to the next step.
No
Go to the next step.
4
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 [HEADLIGHT AUTO LEVELING SYSTEM].)
No
DTC troubleshooting completed.