Headlight Beam Level Control Actuator Circuit: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (READY).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / HL Auto Leveling / Active Test.
5. Check that the leveling motors operate.
   HL AUTO LEVELING
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Drive The Leveling Motor UP	Leveling motor upward operation	ON/OFF	ON: Move up OFF: Stop
   Drive The Leveling Motor DOWN	Leveling motor downward operation	ON/OFF	ON: Move down OFF: Stop

   OK

   Headlight leveling motors operate normally.

NG → See step   2 

OK → See step   5 

1. Disconnect the A96 headlight leveling ECU assembly connector.
2. Disconnect the A87 or A99 headlight unit (headlight leveling motor) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   LH SIDE
   
   

   Tester Connection	Condition	Specified Condition
   A96-18 (LHT) - A87-2 (LH T)	Always	Below 1 Ω
   A96-11 (LH+) - A87-3 (LHIG)	Always	Below 1 Ω
   A96-24 (LH-) - A87-1 (LH E)	Always	Below 1 Ω
   A96-18 (LHT) - Body ground	Always	10 kΩ or higher
   A96-11 (LH+) - Body ground	Always	10 kΩ or higher
   A96-24 (LH-) - Body ground	Always	10 kΩ or higher

   RH SIDE
   
   

   Tester Connection	Condition	Specified Condition
   A96-17 (RHT) - A99-2 (RH T)	Always	Below 1 Ω
   A96-10 (RH+) - A99-3 (RHIG)	Always	Below 1 Ω
   A96-23 (RH-) - A99-1 (RH E)	Always	Below 1 Ω
   A96-17 (RHT) - Body ground	Always	10 kΩ or higher
   A96-10 (RH+) - Body ground	Always	10 kΩ or higher
   A96-23 (RH-) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the headlight unit (headlight leveling motor) with a new or a known good one. Refer to REMOVAL .
2. Perform the active test of the leveling motors.

   OK

   Headlight leveling motors operate normally.

NG → See step   4 

OK → END (HEADLIGHT UNIT (HEADLIGHT LEVELING MOTOR) WAS DEFECTIVE)