DTC B242E: Open in IG Circuit [09/2014 - 10/2018]: Procedure
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2018 Lexus RC 350, 2018 Lexus RC 300, 2017 Lexus RC 350, 2017 Lexus RC 300, and 2017 Lexus RC 200t. However, it is still accessible from the selected car via links, so may be relevant.
- CLEAR DTC
- Clear the DTCs.
Refer to DTC CHECK / CLEAR [09/2014 - 10/2018]
Body Electrical > HL AutoLeveling > Clear DTCs
Result
Proceed to NEXT
Result:
NEXT
See step 2
- Clear the DTCs.
- CHECK FOR DTC
- Turn the engine switch on (IG).
- Check for DTCs.
Refer to DTC CHECK / CLEAR [09/2014 - 10/2018]
Body Electrical > HL AutoLeveling > Trouble Codes
OK
DTC B242E is not output.
Result
Proceed to OK NG
Result:
OK
USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2014 - 10/2015] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - 11/2017] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2017 - 10/2018]
Result:
NG
See step 3
- CHECK HARNESS AND CONNECTOR (HEADLIGHT LIGHT CONTROL ECU SUB-ASSEMBLY RH - BATTERY AND BODY GROUND)
- Disconnect the A7 headlight light control ECU sub-assembly RH connector.
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition A7-4 (IG) - Body ground Engine switch off Below 1 V A7-4 (IG) - Body ground Engine switch on (IG) 11 to 14 V - Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition A7-12 (GND) - Body ground Always Below 1 Ω Result
Proceed to OK NG
Result:
OK
REPLACE HEADLIGHT LIGHT CONTROL ECU SUB-ASSEMBLY RH. Refer to REMOVAL [09/2014 - 10/2018]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR