AFS ECU Communication Stop Mode (07/2015 -): Procedure

1. Disconnect the cable from the negative (-) battery terminal.
2. Disconnect the A72 headlight swivel ECU assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A72-12 (CANH) - A72-13 (CANL)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Headlight Swivel ECU Assembly)

Result:  NG

NG 

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (HEADLIGHT SWIVEL ECU ASSEMBLY) 

Result:  OK

OK 

See step  2

1. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A72-22 (E1) - Body ground	Cable disconnected from negative (-) battery terminal	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Headlight Swivel ECU Assembly)

2. Reconnect the cable to the negative (-) battery terminal.
3. Measure the voltage according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A72-15 (IG) - Body ground	Engine switch on (IG)	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Headlight Swivel ECU Assembly)

   Result

   Result	Proceed to
   OK (w/ Adaptive Front-lighting System)	A
   OK (w/ Automatic Headlight Beam Level Control System)	B
   NG	C

Result:  A

A 

REPLACE HEADLIGHT SWIVEL ECU ASSEMBLY 

(Refer to REMOVAL (07/2015 -) )

Result:  B

B 

REPLACE HEADLIGHT LEVELING ECU (HEADLIGHT SWIVEL ECU ASSEMBLY) 

(Refer to REMOVAL (07/2015 -) )

Result:  C

C 

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)