Headlight Beam Level Control Actuator Circuit [10/2016 - 09/2020]: Procedure

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 AutoLeveling / Active Test.
5. Perform the Active Test according to the display on the Techstream.

   Body Electrical > HL AutoLeveling > Active Test 

   Tester Display	Measurement Item	Control Range	Diagnostic Note
   Drive The Leveling Motor	Headlight leveling motor upward or downward operation	Stop, Down or Up	Perform the Active Test with the engine started and vehicle stopped.

   Body Electrical > HL AutoLeveling > Active Test 

   Tester Display
   Drive The Leveling Motor

   OK

   Headlight leveling motors operate normally.

   Result

   Result	Proceed to
   OK	A
   NG (for LH Side)	B
   NG (for RH Side)	C

Result: 

A 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [10/2016 - 09/2020] 

Result: 

C 

See step  5

Result: 

B 

See step  2

1. Replace the headlight unit LH with a new or known good one.

   Refer to DISASSEMBLY [10/2016 - 09/2018] , or refer to DISASSEMBLY [09/2018 - 09/2020]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  3

1. Replace the headlight leveling motor LH with a new or known good one.

   Refer to DISASSEMBLY [10/2016 - 09/2018] , or refer to DISASSEMBLY [09/2018 - 09/2020]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  4

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 AutoLeveling / Active Test.
5. Perform the Active Test according to the display on the Techstream.

   Body Electrical > HL AutoLeveling > Active Test 

   Tester Display	Measurement Item	Control Range	Diagnostic Note
   Drive The Leveling Motor	Headlight leveling motor upward or downward operation	Stop, Down or Up	Perform the Active Test with the engine started and vehicle stopped.

   Body Electrical > HL AutoLeveling > Active Test 

   Tester Display
   Drive The Leveling Motor

   OK

   Headlight leveling motors operate normally.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (HEADLIGHT LEVELING MOTOR LH WAS DEFECTIVE) 

Result: 

NG 

REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH. Refer to  REMOVAL [10/2016 - 09/2020] 

1. Replace the headlight unit RH with a new or known good one.

   Refer to DISASSEMBLY [10/2016 - 09/2018] , or refer to DISASSEMBLY [09/2018 - 09/2020]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  6

1. Replace the headlight leveling motor RH with a new or known good one.

   Refer to DISASSEMBLY [10/2016 - 09/2018] , or refer to DISASSEMBLY [09/2018 - 09/2020]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  7

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 AutoLeveling / Active Test.
5. Perform the Active Test according to the display on the Techstream.

   Body Electrical > HL AutoLeveling > Active Test 

   Tester Display	Measurement Item	Control Range	Diagnostic Note
   Drive The Leveling Motor	Headlight leveling motor upward or downward operation	Stop, Down or Up	Perform the Active Test with the engine started and vehicle stopped.

   Body Electrical > HL AutoLeveling > Active Test 

   Tester Display
   Drive The Leveling Motor

   OK

   Headlight leveling motors operate normally.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (HEADLIGHT LEVELING MOTOR RH WAS DEFECTIVE) 

Result: 

NG 

REPLACE NO. 1 HEADLIGHT ECU SUB-ASSEMBLY RH. Refer to  REMOVAL [10/2016 - 09/2020]