DTC B242E: Open in IG Circuit [06/2015 - ]: Procedure

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [06/2015 - 11/2018] , or refer to DTC CHECK / CLEAR [11/2018 - ]

   Body Electrical > HL AutoLeveling > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  2

1. Turn the power switch on (IG).
2. Turn on the headlights using the headlight dimmer switch.
3. Check for DTCs.

   Refer to DTC CHECK / CLEAR [06/2015 - 11/2018] , or refer to DTC CHECK / CLEAR [11/2018 - ]

   Body Electrical > HL AutoLeveling > Trouble Codes 

   Result

   Result	Proceed to
   DTC B242E output does not occur	A
   DTC B242E output occurs	B

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2015 - 11/2018]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ] 

Result: 

B 

See step  3

1. Disconnect the headlight light control ECU sub-assembly RH connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to headlight Light Control ECU Sub-assembly RH)

2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   A30-4 (IG) - Body ground	Power switch off	Below 1 V
   A30-4 (IG) - Body ground	Power switch on (IG)	11 to 14 V

3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A30-12 (GND) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE HEADLIGHT LIGHT CONTROL ECU SUB-ASSEMBLY RH. Refer to  DISASSEMBLY [06/2015 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR