How To Proceed With Troubleshooting [08/2013 - ]
WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
HINT:
- Use these procedures to troubleshoot the lane departure alert system.
- *: Use the Techstream.
- VEHICLE BROUGHT TO WORKSHOP
NEXT: Go to next step
- INSPECT AUXILIARY BATTERY VOLTAGE
- Measure the auxiliary battery voltage with the power switch off.
Standard voltage
11 to 14 V
If the voltage is below 11 V, replace or recharge the auxiliary battery before proceeding to the next step.
NEXT: Go to next step
- Measure the auxiliary battery voltage with the power switch off.
- CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*
- Use the Techstream to check if the CAN communication system is functioning normally.RESULT
Result Proceed to CAN DTC is not output A CAN DTC is output B B → GO TO CAN COMMUNICATION SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ]
A: Go to next step
- Use the Techstream to check if the CAN communication system is functioning normally.
- CHECK FOR DTCs*
Refer to DTC Check / Clear. Refer to DTC CHECK / CLEAR [08/2013 - ] .
- Check for DTCs and note any codes that are output.
- Clear the DTCs.
- Recheck for DTCs. Based on the DTCs output in the first step, try to reproduce the lane departure alert system DTCs by simulating the conditions indicated by the DTCs.RESULT
Result Proceed to DTCs are not output A DTCs are output B B → GO TO DTC CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART [08/2013 - ]
A: Go to next step
- PROBLEM SYMPTOMS TABLE
- Refer to Problem Symptoms Table. Refer to PROBLEM SYMPTOMS TABLE [08/2013 - ] .RESULT
Result Proceed to Fault is not listed in problem symptoms table A Fault is listed in problem symptoms table B B → Go to step 8
A: Go to next step
- Refer to Problem Symptoms Table. Refer to PROBLEM SYMPTOMS TABLE [08/2013 - ] .
- OVERALL ANALYSIS AND TROUBLESHOOTING*
- Terminals of ECU. Refer to TERMINALS OF ECU [08/2013 - ]
- Data List / Active Test. Refer to DATA LIST / ACTIVE TEST [08/2013 - ]
NEXT: Go to next step
- ADJUST, REPAIR OR REPLACE NOTE:
When the lane departure warning camera is replaced with a new one, adjustment of the lane departure warning camera beam axis must be performed. Refer to ADJUSTMENT [08/2013 - ] .
NEXT: Go to next step
- CONFIRMATION TEST
NEXT → END