Brake Actuator (Skid Control ECU) Communication Stop Mode [04/2013 - 10/2016]: Procedure

1. Disconnect the cable from the negative (-) battery terminal.
2. Disconnect the A15 skid control ECU (brake actuator assembly) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Skid Control ECU (Brake Actuator Assembly))

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A15-25 (CANH) - A15-14 (CANL)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

   Result

   Result
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)) 

Result: 

OK 

See step  2

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Skid Control ECU (Brake Actuator Assembly))

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A15-1 (GND1) - Body ground	Cable disconnected from negative (-) battery terminal	Below 1 Ω
   A15-13 (GND2) - Body ground	Cable disconnected from negative (-) battery terminal	Below 1 Ω

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

   *a	Front view of wire harness connector (to Skid Control ECU (Brake Actuator Assembly))

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A15-12 (+BS) - Body ground	Always	11 to 14 V
   A15-24 (BM) - Body ground	Always	11 to 14 V
   A15-34 (IG1) - Body ground	Engine switch on (IG)	11 to 14 V

   Result

   Result
   OK
   NG

Result: 

OK 

REPLACE BRAKE ACTUATOR ASSEMBLY. Refer to  REMOVAL [04/2013 - 10/2016] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)