DTC B242E: Open in IG Circuit [12/2018 -]: Procedure
WARNING: This page is about a different car, the 2022 Toyota Prius, 2021 Toyota Prius, 2020 Toyota Prius, and 2019 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.
- CLEAR DTC
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG).
- Turn the Techstream on.
- Enter the following menus: Body Electrical / AFS / Trouble Codes.
- Clear the DTCs.
Body Electrical > AFS > Clear DTCs
Result
Proceed to NEXT
Result:
NEXT
See step 2
- CHECK FOR DTC
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG).
- Turn the Techstream on.
- Enter the following menus: Body Electrical / AFS / Trouble Codes.
- Check for DTCs.
Body Electrical > AFS > 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 [12/2018 - 07/2020] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [07/2020 - 06/2021] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2021 -]
Result:
NG
See step 3
- INSPECT NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH (IG TERMINAL VOLTAGE)
*a Component without harness connected
(No. 1 Headlight ECU Sub-assembly LH)- Disconnect the A65 No. 1 headlight ECU sub-assembly LH connector.
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
& Routing (A65)
(A65)
Tester Connection Condition Specified Condition A65-4 (IG) - Body ground Power switch off Below 1 V A65-4 (IG) - Body ground Power switch on (IG) 11 to 14 V Result
Proceed to OK NG
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 4
- CHECK HARNESS AND CONNECTOR (NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH - BODY GROUND)
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
& Routing (A65)
(A65)
Tester Connection Condition Specified Condition A65-12 (GND) - Body ground Always Below 1 Ω Result
Proceed to OK NG
Result:
OK
REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH. Refer to REMOVAL [12/2018 -]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
- Measure the resistance according to the value(s) in the table below.