DTC B242E: Open in IG Circuit [10/2018 - ]: Procedure

1. Choose the model to be inspected.

   Result

   Result	Proceed to
   for Triple Beam Headlight	A
   for Single Beam Headlight	B

Result: 

B 

See step  4

Result: 

A 

See step  2

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / AFS or AFS (Sub) / Trouble Codes.
5. Clear the DTCs.

   Body Electrical > AFS > Clear DTCs 

   Body Electrical > AFS (Sub) > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  3

1. Wait 10 seconds or more.
2. Enter the following menus: Body Electrical / AFS or AFS (Sub) / Trouble Codes.
3. Check for DTCs.

   Body Electrical > AFS > Trouble Codes 

   Body Electrical > AFS (Sub) > Trouble Codes 

   OK

   DTC B242E is not output.

   Result

   Result	Proceed to
   OK	A
   NG (DTC output from No. 1 headlight ECU sub-assembly LH)	B
   NG (DTC output from No. 1 headlight ECU sub-assembly RH)	C

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - ] 

Result: 

B 

See step  6

Result: 

C 

See step  8

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.
5. Clear the DTCs.

   Body Electrical > HL AutoLeveling > Clear DTCs 

   Body Electrical > HL AutoLeveling (Sub) > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  5

1. Wait 10 seconds or more.
2. Enter the following menus: Body Electrical / HL AutoLeveling or HL AutoLeveling (Sub) / Trouble Codes.
3. Check for DTCs.

   Body Electrical > HL AutoLeveling > Trouble Codes 

   Body Electrical > HL AutoLeveling (Sub) > Trouble Codes 

   OK

   DTC B242E is not output.

   Result

   Result	Proceed to
   OK	A
   NG (DTC output from No. 1 headlight ECU sub-assembly LH)	B
   NG (DTC output from No. 1 headlight ECU sub-assembly RH)	C

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - ] 

Result: 

C 

See step  8

Result: 

B 

See step  6

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the No. 1 headlight ECU sub-assembly LH connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   A15-4 (IG) - Body ground	Ignition switch ON	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  7

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A15-12 (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 [10/2018 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the No. 1 headlight ECU sub-assembly RH connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   A16-4 (IG) - Body ground	Ignition switch ON	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  9

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A16-12 (GND) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY RH. Refer to  REMOVAL [10/2018 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR