Lane Keeping Assist System (LKAS) Symptom Troubleshooting - LKAS switch does not work
LKAS switch does not work
1.
Gauge control module operation check:

Gauge control module operation check
?1.
Do the gauge control module self-diagnostic function.

Is the multi-information display (MID) OK?

     
YES
     
     
     
Go to step 2.
     
NO
     
     
     
2.
LKAS switch check 1:

LKAS switch check 1
?1.
Check the parameter(s) below with the HDS pressing the MAIN switch and the LKAS switch of the LKAS switch.
Signal
Current conditions
Values
Unit
MAIN switch
    
LKAS switch
    

Does it indicate ON when the appropriate switch is pressed, and OFF when the appropriate switch is released?

     
YES
     
     
     
Go to step 3.
     
NO
     
     
     
Any of the indicators turned ON and OFF, replace the LKAS switch.?
     
NO
     
     
     
No indicator turned ON and OFF, go to step 4.
3.
Body electrical DTCs check:

Body electrical DTCs check
?1.
Check for DTCs with the HDS.
DTC Description
DTC
   

Are any DTCs indicated?

     
YES
     
     
     
Go to the indicated DTC's troubleshooting.?
     
NO
     
     
     
Check other related systems (PGM-FI system, VSA system, and EPS system).?
4.
LKAS switch check 2:

LKAS switch check 2
?1.
Test the LKAS switch.

Is the switch OK?

     
YES
     
     
     
Check for poor connections or loose terminals between the gauge control module and the LKAS switch. If OK, replace the gauge control module.?
     
NO