DTC B2417: Headlight Beam Level Control Motor LH Malfunction; DTC B2418: Headlight Beam Level Control Motor RH Malfunction: 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 / AFS / Active Test.
5. Check the operation.
   AFS (AFS ECU)
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Drive The Leveling Motor	Leveling motor upward operation	UP/OFF	-
   Drive The Leveling Motor	Leveling motor downward operation	DOWN/OFF	-

   OK

   Headlight leveling motor is operated.

   Result

   Result	Proceed to
   OK (When checking from PROBLEM SYMPTOMS TABLE)	A
   OK (When checking from DIAGNOSTIC TROUBLE CODE CHART)	B
   NG	C

C → See step   2 

B → REPLACE AFS ECU 

A → PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

Fig 1: Identifying A28 AFS ECU Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the B12 and B2 headlight assembly connectors.
2. Disconnect the A28 AFS ECU connector.
3. Measure the resistance according to the value (s) in the table below.

   Standard resistance

   LH Side (B2417) 

   RH Side (B2418) 

   Tester Connection	Condition	Specified Condition
   A28-29 (LL1+) - B12-15 (LL1+)	Always	Below 1 Ω
   A28-30 (LL1-) - B12-14 (LL1-)	Always	Below 1 Ω
   A28-31 (LL2+) - B12-13 (LL2+)	Always	Below 1 Ω
   A28-32 (LL2-) - B12-12 (LL2-)	Always	Below 1 Ω
   A28-29 (LL1+) - Body ground	Always	10 kΩ or higher
   A28-30 (LL1-) - Body ground	Always	10 kΩ or higher
   A28-31 (LL2+) - Body ground	Always	10 kΩ or higher
   A28-32 (LL2-) - Body ground	Always	10 kΩ or higher

   Tester Connection	Condition	Specified Condition
   A28-13 (LR1+) - B2-15 (LR1+)	Always	Below 1 Ω
   A28-14 (LR1-) - B2-14 (LR1-)	Always	Below 1 Ω
   A28-15 (LR2+) - B2-13 (LR2+)	Always	Below 1 Ω
   A28-16 (LR2-) - B2-12 (LR2-)	Always	Below 1 Ω
   A28-13 (LR1+) - Body ground	Always	10 kΩ or higher
   A28-14 (LR1-) - Body ground	Always	10 kΩ or higher
   A28-15 (LR2+) - Body ground	Always	10 kΩ or higher
   A28-16 (LR2-) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the headlight leveling motor connector.
   Fig 2: Identifying Headlight Leveling Motor Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   LH Side 

   RH Side 

   Tester Connection	Condition	Specified Condition
   B12-15 (LL1+) - 3	Always	Below 1 Ω
   B12-14 (LL1-) - 4	Always	Below 1 Ω
   B12-13 (LL2+) - 1	Always	Below 1 Ω
   B12-12 (LL2-) - 2	Always	Below 1 Ω
   B12-15 (LL1+) - Body ground	Always	10 kΩ or higher
   B12-14 (LL1-) - Body ground	Always	10 kΩ or higher
   B12-13 (LL2+) - Body ground	Always	10 kΩ or higher
   B12-12 (LL2-) - Body ground	Always	10 kΩ or higher

   Tester Connection	Condition	Specified Condition
   B2-15 (LR1+) - 3	Always	Below 1 Ω
   B2-14 (LR1-) - 4	Always	Below 1 Ω
   B2-13 (LR2+) - 1	Always	Below 1 Ω
   B2-12 (LR2-) - 2	Always	Below 1 Ω
   B2-15 (LR1+) - Body ground	Always	10 kΩ or higher
   B2-14 (LR1-) - Body ground	Always	10 kΩ or higher
   B2-13 (LR2+) - Body ground	Always	10 kΩ or higher
   B2-12 (LR2-) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below.
   Fig 3: Identifying Headlight Beam Level Control Motor Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance

   RH Side (B2418) 

   LH Side (B2417) 

   Tester Connection	Condition	Specified Condition
   1 - 2	Always	5.8 to 12.5 Ω
   3 - 4	Always	5.8 to 12.5 Ω

   Tester Connection	Condition	Specified Condition
   1 - 2	Always	5.8 to 12.5 Ω
   3 - 4	Always	5.8 to 12.5 Ω

NG → REPLACE HEADLIGHT ASSEMBLY LH OR HEADLIGHT ASSEMBLY RH 

OK → REPLACE AFS ECU