Skid Control ECU Communication Stop Mode [11/2017 - ]: Procedure

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A75-22 (CANH) - A75-10 (CANL)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

Result: 

NG 

REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) (CAN-H, CAN-L) 

Result: 

OK 

See step  2

1. Disconnect the brake actuator assembly (skid control ECU) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A75-25 (GND1) - Body ground	Cable disconnected from negative (-) battery terminal	Below 1 Ω
   A75-1 (GND2) - Body ground	Cable disconnected from negative (-) battery terminal	Below 1 Ω

3. Reconnect the cable to the negative (-) battery terminal.
   NOTE:

   When disconnecting the cable, some systems need to be initialized after the cable is reconnected (Refer to INITIALIZATION [11/2017 - ] )

4. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   A75-38 (+BS) - Body ground	Always	11 to 14 V
   A75-13 (BM) - Body ground	Always	11 to 14 V
   A75-12 (IG1) - Body ground	Ignition switch ON	11 to 14 V

Result: 

OK 

REPLACE BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) 

(Refer to REMOVAL [11/2017 - ] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR