Lane Keeping Assist System (LKAS) Symptom Troubleshooting Index

Symptom	Diagnostic procedure	Also check for
LKAS indicator (on the MID) does not come on	Symptom troubleshooting - Refer to: Lane Keeping Assist System (LKAS) Symptom Troubleshooting - LKAS indicator (on the MID) does not come on .
LKAS indicator (on the MID) does not go off	NOTE: If any of the CAN communication failure DTCs are indicated in other systems, troubleshoot the DTC first. Check for open wire or shorted wire in the F-CAN circuit; Between the gauge control module and the CAN gateway (F-CAN D_H, F-CAN D_L) Between the millimeter wave radar and the CAN gateway (F-CAN E_H, F-CAN E_L) Check the millimeter wave radar power circuit (IG1_VSA(VST)) Check the millimeter wave radar unit ground circuit (GND) Do the gauge control module self-diagnostic function .	Refer to the following about the indicator operating condition; How to Troubleshoot - Refer to: How to Troubleshoot the Lane Keeping Assist System (LKAS) (2022 - 2023) How to Troubleshoot the Lane Keeping Assist System (LKAS) (2019 - 2021) . Refer to the followings about the circuit troubleshooting; Gauge control module connector for inputs and outputs Millimeter wave radar connector for inputs and outputs LKAS circuit diagram - Refer to: Lane Keeping Assist System (LKAS) Circuit Diagram (2019 - 2021 or Lane Keeping Assist System (LKAS) Circuit Diagram (2022 - 2023) Fuse to components index Ground to components index

Symptom

Diagnostic procedure

Also check for

LKAS indicator (on the MID) does not come on

LKAS indicator (on the MID) does not go off

NOTE: If any of the CAN communication failure DTCs are indicated in other systems, troubleshoot the DTC first.

Check for open wire or shorted wire in the F-CAN circuit;
- Between the gauge control module and the CAN gateway (F-CAN D_H, F-CAN D_L)
- Between the millimeter wave radar and the CAN gateway (F-CAN E_H, F-CAN E_L)
Check the millimeter wave radar power circuit (IG1_VSA(VST))
Check the millimeter wave radar unit ground circuit (GND)
Do the gauge control module self-diagnostic function .

Refer to the following about the indicator operating condition;

Refer to the followings about the circuit troubleshooting;