Skid Control ECU Communication Stop Mode: Procedure

1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and the branch wire.
   WARNING:

   Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

   NOTE:

   When disconnecting the cable, some systems need to be initialized after the cable is reconnected. Refer to INITIALIZATION .

NEXT: Go to next step 

1. Turn the ignition switch off.
   Fig 1: Checking CAN Bus Wires (Master Cylinder Solenoid (Skid Control ECU))

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the A4 master cylinder solenoid (skid control ECU) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   A4-11 (CANH) - A4-25 (CANL)	Ignition switch off	54 to 69 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Master Cylinder Solenoid (Skid Control ECU))

NG → REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (CAN-H, CAN-L) 

OK: Go to next step 

1. Connect 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 .

2. Measure the resistance according to the value(s) in the table below.
   Fig 2: Checking Harness And Connector (Master Cylinder Solenoid (Skid Control ECU) - Battery And Body Ground)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A4-32 (GND2) - Body ground	Always	Below 1 Ω

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

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   A4-46 (IG1) - Body ground	Ignition switch ON	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Master Cylinder Solenoid (Skid Control ECU))

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   4