Skid Control ECU Communication Stop Mode [06/2016 - ]: Procedure

1. Disconnect the cable from the negative (-) battery terminal.
2. Disconnect the A5 skid control ECU (brake actuator 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
   A5-26 (CANH) - A5-14 (CANL)	Cable disconnected from negative (-) battery terminal	114 to 126 Ω

   TEXT IN ILLUSTRATION
   
   

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

Result: 

NG 

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

Result: 

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
   A5-13 (GND2) - Body ground	Cable disconnected from negative (-) battery terminal	Below 1 Ω
   A5-38 (GND1) - Body ground	Cable disconnected from negative (-) battery terminal	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

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

2. Connect 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
   A5-1 (+BM) - Body ground	Ignition switch off	11 to 14 V
   A5-25 (+BS) - Body ground	Ignition switch off	11 to 14 V
   A5-28 (IG1) - Body ground	Ignition switch ON	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

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

Result: 

OK 

REPLACE SKID CONTROL ECU 

(Refer to REMOVAL [06/2016 - ] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)