DTC U1000: CAN Communication Failure (Message Registry) [08/2019 - ]: Procedure

1. Choose the model to be inspected.

   Result

   Result	Proceed to
   for Multiple 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 engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / AFS / Trouble Codes.
5. Clear the DTCs.

   Body Electrical > AFS > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  3

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / AFS / Trouble Codes.
5. Check for DTCs.

   Body Electrical > AFS > Trouble Codes 

   OK

   DTC U1000 is not output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - ] 

Result: 

NG 

REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH. Refer to  REMOVAL [08/2019 - ] 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / HL Auto Leveling / Trouble Codes.
5. Clear the DTCs.

   Body Electrical > HL Auto Leveling > Clear DTCs 

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  5

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / HL Auto Leveling / Trouble Codes.
5. Check for DTCs.

   Body Electrical > HL Auto Leveling > Trouble Codes 

   OK

   DTC U1000 is not output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - ] 

Result: 

NG 

REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH. Refer to  REMOVAL [08/2019 - ]