DTC B2412: Headlight Swivel Motor LH Malfunction; DTC B2413: Headlight Swivel Motor RH Malfunction: Procedure

1. Clear the DTC. Refer to DTC CHECK / CLEAR .
2. Check for DTC. Refer to DTC CHECK / CLEAR .

   OK

   DTC B2412 or B2413 output does not occur.

NG → See step   2 

OK → See step   9 

1. Using the Techstream, perform the Active Test.
   AFS
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Drive Swivel Motor RH RIGHT	Swivel motor RH right direction rotation	OFF - RIGHT	-
   Drive Swivel Motor RH LEFT	Swivel motor RH left direction rotation	OFF - LEFT	-
   Drive Swivel Motor LH RIGHT	Swivel motor LH right direction rotation	OFF - RIGHT	-
   Drive Swivel Motor LH LEFT	Swivel motor LH left direction rotation	OFF - LEFT	-

   OK

   Swivel motors operate normally.

NG → See step   4 

OK: Go to next step 

1. Temporarily replace the headlight swivel motor with a new or normally functioning one. Refer to DISASSEMBLY .
2. Check for DTC. Refer to DTC CHECK / CLEAR .

   OK

   DTC B2412 or B2413 output does not occur.

NG → See step   10 

OK → See step   12 

Fig 1: Identifying A37 AFS ECU (IGS) Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the A37 ECU connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard voltage

   Tester Connection	Switch Condition	Specified Condition
   A37-14 (IGS) - Body ground	Engine switch on (IG)	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

Fig 2: Identifying A37 AFS ECU (E1) Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the A37 ECU connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   A37-22 (E1) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

Fig 3: Identifying AFS ECU And Headlight Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the A37 ECU connector.
2. Disconnect the B1 or B11 light connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   for LH 

   for RH 

   Tester Connection	Condition	Specified Condition
   A37-1 (SMBL) - B1-22 (SMBL)	Always	Below 1 Ω
   A37-29 (SML) - B1-23 (SML)	Always	Below 1 Ω
   A37-23 (SMGL) - B1-24 (SMGL)	Always	Below 1 Ω
   A37-1 (SMBL) - Body ground	Always	10 kΩ or higher
   A37-29 (SML) - Body ground	Always	10 kΩ or higher
   A37-23 (SMGL) - Body ground	Always	10 kΩ or higher

   Tester Connection	Condition	Specified Condition
   A37-2 (SMBR) - B11-22 (SMBR)	Always	Below 1 Ω
   A37-10 (SMR) - B11-23 (SMR)	Always	Below 1 Ω
   A37-24 (SMGR) - B11-24 (SMGR)	Always	Below 1 Ω
   A37-2 (SMBR) - Body ground	Always	10 kΩ or higher
   A37-10 (SMR) - Body ground	Always	10 kΩ or higher
   A37-24 (SMGR) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

Fig 4: Inspecting Headlight Assembly

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the headlight assembly. Refer to REMOVAL .
2. Disconnect the swivel motor connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   for LH 

   for RH 

   Tester Connection	Condition	Specified Condition
   22 (SMBL) - 3 (IG)	Always	Below 1 Ω
   23 (SML) - 2 (LIN)	Always	Below 1 Ω
   24 (SMGL) - 1 (GND)	Always	Below 1 Ω

   Tester Connection	Condition	Specified Condition
   22 (SMBR) - 3 (IG)	Always	Below 1 Ω
   23 (SMR) - 2 (LIN)	Always	Below 1 Ω
   24 (SMGR) - 1 (GND)	Always	Below 1 Ω

NG → See step   11 

OK: Go to next step 

1. Temporarily replace the headlight swivel motor with a new or normally functioning one. Refer to DISASSEMBLY .
2. Check for DTC. Refer to DTC CHECK / CLEAR .

   OK

   DTC B2412 or B2413 output does not occur.

NG → See step   10 

OK → See step   12